GNU nano is a small and friendly text editor. Besides
basic text editing, nano offers features like undo/redo,
syntax coloring, interactive search-and-replace, auto-indentation,
line numbers, word completion, file locking, backup files, and
internationalization support.
The original goal for nano was to be a complete bug-for-bug
emulation of Pico. But currently the goal is to be as compatible
as is reasonable while offering a superset of Pico’s functionality.
See Pico Compatibility for more details on how nano and
Pico differ.
Starting with version 4.0, nano no longer hard-wraps an overlong
line by default. It further uses linewise scrolling by default, and by
default includes the line below the title bar into the editing area.
If you want the old, Pico behavior back, you can use the
following options: --breaklonglines,
--jumpyscrolling, and --emptyline
(or -bje).
But it is also possible to specify one or more options (see Command-line Options),
and to edit several files in a row. Additionally, the cursor
can be put on a specific line of a file by adding the line number
with a plus sign before the filename, and even in a specific column by
adding it with a comma.
(Negative numbers count from the end of the file or line.)
The cursor can also be put on the first or last occurrence of a specific string
by specifying that string after +/ or +? before the filename.
The string can be made case sensitive and/or caused to be interpreted as a
regular expression by inserting a c and/or r after the plus sign.
These search modes can be explicitly disabled by using the uppercase variant
of those letters: C and/or R. When the string contains spaces,
it needs to be enclosed in quotes.
A more complete command synopsis thus is:
Normally, however, you set your preferred options in a nanorc
file (see Nanorc Files). And when using set positionlog
(making nano remember the cursor position when you close a file),
you will rarely need to specify a line number.
As a special case: when instead of a filename a dash is given, nano
will read data from standard input. This means you can pipe the output of
a command straight into a buffer, and then edit it.
The default screen of nano consists of four areas.
From top to bottom these are: the title bar, the edit window,
the status bar, and two help lines.
The title bar consists of
three sections: left, center and right. The section on the left
displays the version of nano being used. The center section
displays the current filename, or "New Buffer" if the file has not yet
been named. The section on the right displays "Modified" if the
file has been modified since it was last saved or opened.
The status bar is the third line from the bottom of the screen. It
shows important and informational messages. Any error messages that
occur from using the editor will appear on the status bar. Any questions
that are asked of the user will be asked on the status bar, and any user
input (search strings, filenames, etc.) will be input on the status bar.
The two help lines at the bottom of the screen show some of the most
essential functions of the editor.
3.2 Entering Text
nano is a "modeless" editor. This means that all keystrokes,
with the exception of Control and Meta sequences, enter text into the
file being edited.
Characters not present on the keyboard can be entered in two ways:
For characters with a single-byte code,
pressing the Esc key twice and then typing a three-digit decimal number
(from 000 to 255) will make nano behave as if you
typed the key with that value.
For any possible character, pressing M-V (Alt+V) and then typing a
six-digit hexadecimal number (starting with 0 or 1) will enter the
corresponding Unicode character into the buffer.
For example, typing Esc Esc 2 3 4 will enter the character "ê" —
useful when writing about a French party. Typing M-V 0 0 2 2 c 4
will enter the symbol "⋄", a little diamond.
3.3 Commands
Commands are given by using the Control key (Ctrl, shown as ^)
or the Meta key (Alt or Cmd, shown as M-).
A control-key sequence is entered by holding down the Ctrl key and
pressing the desired key.
A meta-key sequence is entered by holding down the Meta key (normally
the Alt key) and pressing the desired key.
If for some reason on your system the combinations with Ctrl or Alt do
not work, you can generate them by using the Esc key. A control-key
sequence is generated by pressing the Esc key twice and then pressing
the desired key, and a meta-key sequence by pressing the Esc key once
and then pressing the desired key.
3.4 The Cutbuffer
Text can be cut from a file a whole line at a time with ^K.
The cut line is stored in the cutbuffer. Consecutive strokes of ^K
will add each cut line to this buffer, but a ^K
after any other keystroke will overwrite the entire cutbuffer.
The contents of the cutbuffer can be pasted at the current cursor position
with ^U.
A line of text can be copied into the cutbuffer (without cutting it)
with M-6.
3.5 The Mark
Text can be selected by first ’setting the Mark’ with ^6
or M-A and then moving the cursor to the other end of the portion
to be selected. The selected portion of text will be highlighted.
This selection can now be cut or copied in its entirety with a single
^K or M-6. Or the selection can be used to limit the scope of
a search-and-replace (^\) or spell-checking session (^T^T).
On some terminals, text can be selected also by holding down Shift
while using the cursor keys. Holding down the Ctrl or Alt
key too will increase the stride. Such a selection is cancelled
upon any cursor movement where Shift isn’t held.
Cutting or copying selected text toggles off the mark automatically.
If needed, it can be toggled off manually with another ^6 or M-A.
3.6 Search and Replace
One can search the current buffer for the occurrence of any string
with the Search command (default key binding: ^W). The default search
mode is forward, case-insensitive, and for literal strings. But one
can search backwards by pressing M-B, search case sensitively with M-C,
and interpret regular expressions in the search string with M-R.
A regular expression in a search string always covers just one line;
it cannot span multiple lines. And when replacing (with ^\ or M-R)
the replacement string cannot contain a newline (LF).
3.7 Using the Mouse
When mouse support has been configured and enabled, a single mouse click
places the cursor at the indicated position. Clicking a second time in
the same position toggles the mark. Clicking in the two help lines
executes the selected shortcut. To be able to select text with the
left button, or paste text with the middle button, hold down the
Shift key during those actions.
The mouse will work in the X Window System, and on the console when gpm
is running.
3.8 Anchors
With M-Ins you can place an anchor (a kind of temporary bookmark)
at the current line. With M-PgUp and M-PgDn you can jump
to an anchor in the backward/forward direction. This jumping wraps
around at the top and bottom.
When a line with an anchor is removed, the line where the cursor ends up
inherits the anchor. After performing an operation on the entire buffer
(like formatting it, piping it through a command, or doing an external
spell check on it), any anchors that were present are gone. And when
you close the buffer, all its anchors simply disappear; they are not saved.
Anchors are visualized in the margin when line numbers are activated.
3.9 Limitations
The recording and playback of keyboard macros works correctly only on a
terminal emulator, not on a Linux console (VT), because the latter does
not by default distinguish modified from unmodified arrow keys.
4 The Help Viewer
The built-in help in nano is available by pressing ^G.
It is fairly self-explanatory. It documents the various parts of the
editor and the available keystrokes. Navigation is via the ^Y (Page Up)
and ^V (Page Down) keys. ^X exits from the help viewer.
5 The File Browser
When in the Read-File (^R) or Write-Out menu (^O),
pressing ^T will invoke the file browser.
Here, one can navigate directories in a graphical manner in order to
find the desired file.
Basic movement in the file browser is accomplished with the arrow and
other cursor-movement keys. More targeted movement is accomplished by
searching, via ^W or w, or by changing directory, via
^_ or g. The behavior of the Enter key (or s)
varies by what is currently selected.
If the currently selected object is a directory, the file browser will
enter and display the contents of the directory. If the object is a
file, this filename and path are copied to the status bar, and the file
browser exits.
6 Command-line Options
nano takes the following options from the command line:
-A
--smarthome
Make the Home key smarter. When Home is pressed anywhere but at the
very beginning of non-whitespace characters on a line, the cursor will
jump to that beginning (either forwards or backwards). If the cursor is
already at that position, it will jump to the true beginning of the
line.
-B
--backup
When saving a file, back up the previous version of it, using the current
filename suffixed with a tilde (~).
-C directory
--backupdir=directory
Make and keep not just one backup file, but make and keep a uniquely
numbered one every time a file is saved — when backups are enabled.
The uniquely numbered files are stored in the specified directory.
-D
--boldtext
For the interface, use bold instead of reverse video. This will be overridden
by setting the options titlecolor, statuscolor, keycolor,
functioncolor, numbercolor, and/or selectedcolor in your
nanorc file. See set keycolor for details.
-E
--tabstospaces
Convert each typed tab to spaces — to the number of spaces
that a tab at that position would take up.
-F
--multibuffer
Read a file into a new buffer by default.
-G
--locking
Enable vim-style file locking when editing files.
-H
--historylog
Save the last hundred search strings and replacement strings and
executed commands, so they can be easily reused in later sessions.
-I
--ignorercfiles
Don’t look at the system’s nanorc file nor at the user’s nanorc.
-J
--guidestripe
Draw a vertical stripe at the given column, to help judge the width of the
text. (The color of the stripe can be changed with set stripecolor
in your nanorc file.)
-K
--rawsequences
Interpret escape sequences directly, instead of asking ncurses
to translate them. (If you need this option to get some keys to work
properly, it means that the terminfo terminal description that is used
does not fully match the actual behavior of your terminal. This can
happen when you ssh into a BSD machine, for example.)
Using this option disables nano’s mouse support.
-L
--nonewlines
Don’t automatically add a newline when a text does not end with one.
(This can cause you to save non-POSIX text files.)
-M
--trimblanks
Snip trailing whitespace from the wrapped line when automatic
hard-wrapping occurs or when text is justified.
-N
--noconvert
Disable automatic conversion of files from DOS/Mac format.
-O
--bookstyle
When justifying, treat any line that starts with whitespace as the
beginning of a paragraph (unless auto-indenting is on).
-P
--positionlog
For the 200 most recent files, log the last position of the cursor,
and place it at that position again upon reopening such a file.
-Q "regex"
--quotestr="regex"
Set the regular expression for matching the quoting part of a line.
The default value is "^([ \t]*([!#%:;>|}]|//))+".
(Note that \t stands for a literal Tab character.)
This makes it possible to rejustify blocks of quoted text when composing
email, and to rewrap blocks of line comments when writing source code.
-R
--restricted
Restricted mode: don’t read or write to any file not specified on the
command line. This means: don’t read or write history files; don’t allow
suspending; don’t allow spell checking; don’t
allow a file to be appended to, prepended to, or saved under a different
name if it already has one; and don’t make backup files.
Restricted mode can also be activated by invoking nano with
any name beginning with r (e.g. rnano).
-S
--softwrap
Display over multiple screen rows lines that exceed the screen’s width.
(You can make this soft-wrapping occur at whitespace instead of rudely at
the screen’s edge, by using also --atblanks.)
(The old short option, -$, is deprecated.)
-T number
--tabsize=number
Set the displayed tab length to number columns. The value of
number must be greater than 0. The default value is 8.
-U
--quickblank
Make status-bar messages disappear after 1 keystroke instead of after 20.
Note that option -c (--constantshow) overrides this.
When option --minibar or --zero is in effect,
--quickblank makes a message disappear after
0.8 seconds instead of after the default 1.5 seconds.
-V
--version
Show the current version number and exit.
-W
--wordbounds
Detect word boundaries differently by treating punctuation
characters as parts of words.
-X "characters"
--wordchars="characters"
Specify which other characters (besides the normal alphanumeric ones)
should be considered as parts of words. When using this option, you
probably want to omit -W (--wordbounds).
-Y name
--syntax=name
Specify the syntax to be used for highlighting.
See Syntax Highlighting for more info.
-Z
--zap
Let an unmodified Backspace or Delete erase the marked region
(instead of a single character, and without affecting the cutbuffer).
-a
--atblanks
When doing soft line wrapping, wrap lines at whitespace
instead of always at the edge of the screen.
-b
--breaklonglines
Automatically hard-wrap the current line when it becomes overlong.
(This option is the opposite of -w (--nowrap) —
the last one given takes effect.)
-c
--constantshow
Constantly display the cursor position (line number, column number,
and character number) on the status bar.
Note that this overrides option -U (--quickblank).
-d
--rebinddelete
Interpret the Delete and Backspace keys differently so that
both work properly. You should only use this option when on your system
either Backspace acts like Delete or Delete acts like Backspace.
-e
--emptyline
Do not use the line below the title bar, leaving it entirely blank.
-f file
--rcfile=file
Read only this file for setting nano’s options, instead of reading
both the system-wide and the user’s nanorc files.
-g
--showcursor
Make the cursor visible in the file browser (putting it on the
highlighted item) and in the help viewer. Useful for braille users
and people with poor vision.
-h
--help
Show a summary of command-line options and exit.
-i
--autoindent
Automatically indent a newly created line to the same number of tabs
and/or spaces as the previous line (or as the next line if the previous
line is the beginning of a paragraph).
-j
--jumpyscrolling
Scroll the buffer contents per half-screen instead of per line.
-k
--cutfromcursor
Make the ’Cut Text’ command (normally ^K) cut from the current cursor
position to the end of the line, instead of cutting the entire line.
-l
--linenumbers
Display line numbers to the left of the text area.
(Any line with an anchor additionally gets a mark in the margin.)
-m
--mouse
Enable mouse support, if available for your system. When enabled, mouse
clicks can be used to place the cursor, set the mark (with a double
click), and execute shortcuts. The mouse will work in the X Window
System, and on the console when gpm is running. Text can still be
selected through dragging by holding down the Shift key.
-n
--noread
Treat any name given on the command line as a new file. This allows
nano to write to named pipes: it will start with a blank buffer,
and will write to the pipe when the user saves the "file". This way
nano can be used as an editor in combination with for instance
gpg without having to write sensitive data to disk first.
-o directory
--operatingdir=directory
Set the operating directory. This makes nano set up something
similar to a chroot.
-p
--preserve
Preserve the ^Q (XON) and ^S (XOFF) sequences so data being
sent to the editor can be stopped and started.
-q
--indicator
Display a "scrollbar" on the righthand side of the edit window.
It shows the position of the viewport in the buffer
and how much of the buffer is covered by the viewport.
-r number
--fill=number
Set the target width for justifying and automatic hard-wrapping at this
number of columns. If the value is 0 or less, wrapping will occur
at the width of the screen minus number columns, allowing the wrap
point to vary along with the width of the screen if the screen is resized.
The default value is -8.
-s "program [argument …]"
--speller="program [argument …]"
Use the given program to do spell checking and correcting. By default,
nano uses the command specified in the SPELL environment
variable. If SPELL is not set, and --speller is
not specified either, then nano uses its own interactive spell
corrector, which requires either hunspell or GNU spell
to be installed.
-t
--saveonexit
Save a changed buffer without prompting (when exiting with ^X).
This can be handy when nano is used as the composer of an
email program.
(The old form of the long option, --tempfile, is deprecated.)
-u
--unix
Save a file by default in Unix format. This overrides nano’s
default behavior of saving a file in the format that it had.
(This option has no effect when you also use --noconvert.)
-v
--view
Don’t allow the contents of the file to be altered: read-only mode.
This mode allows the user to open also other files for viewing,
unless --restricted is given too.
(Note that this option should NOT be used in place of correct
file permissions to implement a read-only file.)
-w
--nowrap
Do not automatically hard-wrap the current line when it becomes overlong.
This is the default. (This option is the opposite of -b
(--breaklonglines) — the last one given takes effect.)
-x
--nohelp
Expert mode: don’t show the two help lines at the bottom of the screen.
This affects the location of the status bar as well, as in Expert mode it
is located at the very bottom of the editor.
Note: When accessing the help system, Expert mode is temporarily
disabled to display the help-system navigation keys.
-y
--afterends
Make Ctrl+Right and Ctrl+Delete stop at word ends
instead of beginnings.
-z
--suspendable
Obsolete option; ignored. Suspension is enabled by default,
reachable via ^T^Z. (If you want a plain ^Z to
suspend nano, add bind ^Z suspend main to your nanorc.)
-%
--stateflags
Use the top-right corner of the screen for showing some state flags:
I when auto-indenting, M when the mark is on, L when
hard-wrapping (breaking long lines), R when recording a macro,
and S when soft-wrapping.
When the buffer is modified, a star (*) is shown after the
filename in the center of the title bar.
-_
--minibar
Suppress the title bar and instead show information about
the current buffer at the bottom of the screen, in the space
for the status bar. In this "minibar" the filename is shown
on the left, followed by an asterisk if the buffer has been modified.
On the right are displayed the current line and column number, the
code of the character under the cursor (in Unicode format: U+xxxx),
the same flags as are shown by --stateflags, and a percentage
that expresses how far the cursor is into the file (linewise).
When a file is loaded or saved, and also when switching between buffers,
the number of lines in the buffer is displayed after the filename.
This number is cleared upon the next keystroke, or replaced with an
[i/n] counter when multiple buffers are open.
The line plus column numbers and the character code are displayed only when
--constantshow is used, and can be toggled on and off with M-C.
The state flags are displayed only when --stateflags is used.
-0
--zero
Hide all elements of the interface (title bar, status bar, and help lines)
and use all rows of the terminal for showing the contents of the buffer.
The status bar appears only when there is a significant message,
and disappears after 1.5 seconds or upon the next keystroke.
With M-Z the title bar plus status bar can be toggled.
With M-X the help lines.
-!
--magic
When neither the file’s name nor its first line give a clue,
try using libmagic to determine the applicable syntax.
7 Feature Toggles
Toggles allow you to change certain aspects of the editor while you are
editing, aspects that you would normally specify via command-line options
or nanorc options. Each toggle can be flicked via a Meta-key combination
— the Meta key is normally the Alt key (see Commands
for more details). The following global toggles are available:
Constant Cursor Position Display
M-C toggles the -c (--constantshow) command-line option.
Smart Home Key
M-H toggles the -A (--smarthome) command-line option.
Auto Indent
M-I toggles the -i (--autoindent) command-line option.
Cut From Cursor To End-of-Line
M-K toggles the -k (--cutfromcursor) command-line option.
Long-Line Wrapping
M-L toggles the -b (--breaklonglines) command-line option.
Mouse Support
M-M toggles the -m (--mouse) command-line option.
Line Numbers
M-N toggles the -l (--linenumbers) command-line option.
Tabs To Spaces
M-O toggles the -E (--tabstospaces) command-line option.
Whitespace Display
M-P toggles the displaying of whitespace (see Whitespace).
Soft Wrapping
M-S toggles the -S (--softwrap) command-line option.
Expert
M-X toggles the -x (--nohelp) command-line option.
Syntax Coloring
M-Y toggles syntax coloring, when your nanorc defines syntaxes
(see Syntax Highlighting).
Hidden Interface
M-Z toggles the -0 (--zero) command-line option,
but without the -x (--nohelp) part. That is: it toggles
just the title bar plus status bar (or the combined minibar plus status bar),
not the help lines. The latter are toggled with M-X.
8 Nanorc Files
Nanorc files can be used to configure nano to your liking
without using command-line options. During startup nano will
normally read two files: first the system-wide file, /etc/nanorc
(the exact path may be different on your system), and then the user-specific
file, either ~/.nanorc or $XDG_CONFIG_HOME/nano/nanorc or
.config/nano/nanorc, whichever exists first.
However, if --rcfile is given, nano will skip the
above files and will read just the specified settings file.
A nanorc file can contain set and unset commands for
various options (see Settings). It can also contain commands that
define syntax highlighting (see Syntax Highlighting) and commands
that rebind keys (Rebinding Keys). Each command should be on a
separate line, and all commands should be written in lowercase.
Options that do not take an argument are unset by default. So using
the unset command is only needed when wanting to override a
setting from the system’s nanorc file in your own nanorc. Options that
take an argument cannot be unset, but can be assigned the empty string.
Any command-line option overrides its nanorc setting, of course.
Quotes inside the characters parameters below should not be escaped.
The last double quote on the line will be seen as the closing quote.
Make Ctrl+Right and Ctrl+Delete stop at word ends
instead of beginnings.
set allow_insecure_backup
When backing up files, allow the backup to succeed even if its
permissions can’t be (re)set due to special OS considerations.
You should NOT enable this option unless you are sure you need it.
set atblanks
When soft line wrapping is enabled, make it wrap lines at blank characters
(tabs and spaces) instead of always at the edge of the screen.
set autoindent
Automatically indent a newly created line to the same number of tabs
and/or spaces as the previous line (or as the next line if the previous
line is the beginning of a paragraph).
set backup
When saving a file, back up the previous version of it, using the current
filename suffixed with a tilde (~).
set backupdir "directory"
Make and keep not just one backup file, but make and keep a uniquely
numbered one every time a file is saved — when backups are enabled
with set backup or --backup or -B.
The uniquely numbered files are stored in the specified directory.
set boldtext
Use bold instead of reverse video for the title bar, status bar, key combos,
function tags, line numbers, and selected text. This is overridden by
setting the options titlecolor, statuscolor, keycolor,
functioncolor, numbercolor, and/or selectedcolor.
set bookstyle
When justifying, treat any line that starts with whitespace as the
beginning of a paragraph (unless auto-indenting is on).
set brackets "characters"
Set the characters treated as closing brackets when justifying
paragraphs. This may not include blank characters. Only closing
punctuation (see set punct), optionally followed by the specified
closing brackets, can end sentences. The default value is
""')>]}".
set breaklonglines
Automatically hard-wrap the current line when it becomes overlong.
set casesensitive
Do case-sensitive searches by default.
set constantshow
Constantly display the cursor position on the status bar.
Note that this overrides quickblank.
set cutfromcursor
Use cut-from-cursor-to-end-of-line by default, instead of cutting the whole line.
set emptyline
Do not use the line below the title bar, leaving it entirely blank.
set errorcolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for the status bar when an error message is displayed.
The default value is bold,white,red.
See set keycolor for valid color names.
set fill number
Set the target width for justifying and automatic hard-wrapping at this
number of columns. If the value is 0 or less, wrapping will occur
at the width of the screen minus number columns, allowing the wrap
point to vary along with the width of the screen if the screen is resized.
The default value is -8.
set functioncolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for the concise function descriptions
in the two help lines at the bottom of the screen.
See set keycolor for valid color names.
set guidestripe number
Draw a vertical stripe at the given column, to help judge the width of the
text. (The color of the stripe can be changed with set stripecolor.)
set historylog
Save the last hundred search strings and replacement strings and
executed commands, so they can be easily reused in later sessions.
set indicator
Display a "scrollbar" on the righthand side of the edit window.
It shows the position of the viewport in the buffer
and how much of the buffer is covered by the viewport.
set jumpyscrolling
Scroll the buffer contents per half-screen instead of per line.
set keycolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for the shortcut key combos
in the two help lines at the bottom of the screen.
Valid names for the foreground and background colors are:
red, green, blue,
magenta, yellow, cyan,
white, and black.
Each of these eight names may be prefixed with the word
light to get a brighter version of that color.
The word grey or gray may be used
as a synonym for lightblack.
On terminal emulators that can do at least 256 colors,
other valid (but unprefixable) color names are:
pink, purple, mauve,
lagoon, mint, lime,
peach, orange, latte,
rosy, beet, plum, sea,
sky, slate, teal, sage,
brown, ocher, sand, tawny,
brick, crimson, and normal
— where normal means the default foreground or background color.
On such emulators, the color may also be specified as a three-digit hexadecimal
number prefixed with #, with the digits representing the amounts of red,
green, and blue, respectively. This tells nano to select from the
available palette the color that approximates the given values.
Either fgcolor or ,bgcolor may be left out,
and the pair may be preceded by bold and/or italic
(separated by commas) to get a bold and/or slanting typeface,
if your terminal can do those.
set linenumbers
Display line numbers to the left of the text area.
(Any line with an anchor additionally gets a mark in the margin.)
set locking
Enable vim-style lock-files for when editing files.
set magic
When neither the file’s name nor its first line give a clue,
try using libmagic to determine the applicable syntax.
(Calling libmagic can be relatively time consuming.
It is therefore not done by default.)
set matchbrackets "characters"
Specify the opening and closing brackets that can be found by bracket
searches. This may not include blank characters. The opening set must
come before the closing set, and the two sets must be in the same order.
The default value is "(<[{)>]}".
set minibar
Suppress the title bar and instead show information about
the current buffer at the bottom of the screen, in the space
for the status bar. In this "minibar" the filename is shown
on the left, followed by an asterisk if the buffer has been modified.
On the right are displayed the current line and column number, the
code of the character under the cursor (in Unicode format: U+xxxx),
the same flags as are shown by set stateflags, and a percentage
that expresses how far the cursor is into the file (linewise).
When a file is loaded or saved, and also when switching between buffers,
the number of lines in the buffer is displayed after the filename.
This number is cleared upon the next keystroke, or replaced with an
[i/n] counter when multiple buffers are open.
The line plus column numbers and the character code are displayed only when
set constantshow is used, and can be toggled on and off with M-C.
The state flags are displayed only when set stateflags is used.
set minicolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for the minibar.
(When this option is not specified, the colors of the title bar are used.)
See set keycolor for valid color names.
set mouse
Enable mouse support, so that mouse clicks can be used to place the
cursor, set the mark (with a double click), or execute shortcuts.
set multibuffer
When reading in a file with ^R, insert it into a new buffer by default.
set noconvert
Don’t convert files from DOS/Mac format.
set nohelp
Don’t display the help lists at the bottom of the screen.
set nonewlines
Don’t automatically add a newline when a text does not end with one.
(This can cause you to save non-POSIX text files.)
set nowrap
Deprecated option since it has become the default setting.
When needed, use unset breaklonglines instead.
set numbercolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for line numbers.
See set keycolor for valid color names.
set operatingdir "directory"
nano will only read and write files inside "directory" and its
subdirectories. Also, the current directory is changed to here, so
files are inserted from this directory. By default, the operating
directory feature is turned off.
set positionlog
Save the cursor position of files between editing sessions.
The cursor position is remembered for the 200 most-recently edited files.
set preserve
Preserve the XON and XOFF keys (^Q and ^S).
set promptcolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for the prompt bar.
(When this option is not specified, the colors of the title bar are used.)
See set keycolor for valid color names.
set punct "characters"
Set the characters treated as closing punctuation when justifying
paragraphs. This may not include blank characters. Only the
specified closing punctuation, optionally followed by closing brackets
(see set brackets), can end sentences.
The default value is "!.?".
set quickblank
Make status-bar messages disappear after 1 keystroke instead of after 20.
Note that option constantshow overrides this.
When option minibar or zero is in effect,
quickblank makes a message disappear after
0.8 seconds instead of after the default 1.5 seconds.
set quotestr "regex"
Set the regular expression for matching the quoting part of a line.
The default value is "^([ \t]*([!#%:;>|}]|//))+".
(Note that \t stands for a literal Tab character.)
This makes it possible to rejustify blocks of quoted text when composing
email, and to rewrap blocks of line comments when writing source code.
set rawsequences
Interpret escape sequences directly, instead of asking ncurses
to translate them. (If you need this option to get some keys to work
properly, it means that the terminfo terminal description that is used
does not fully match the actual behavior of your terminal. This can
happen when you ssh into a BSD machine, for example.)
Using this option disables nano’s mouse support.
set rebinddelete
Interpret the Delete and Backspace keys differently so that
both work properly. You should only use this option when on your system
either Backspace acts like Delete or Delete acts like Backspace.
set regexp
Do regular-expression searches by default.
Regular expressions in nano are of the extended type (ERE).
set saveonexit
Save a changed buffer automatically on exit (^X); don’t prompt.
(The old form of this option, set tempfile, is deprecated.)
set scrollercolor fgcolor,bgcolor
Use this color combination for the indicator alias "scrollbar".
(On terminal emulators that link to a libvte older than version 0.55,
using a background color here does not work correctly.)
See set keycolor for valid color names.
set selectedcolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for selected text.
See set keycolor for valid color names.
set showcursor
Put the cursor on the highlighted item in the file browser, and show
the cursor in the help viewer, to aid braille users and people with
poor vision.
set smarthome
Make the Home key smarter. When Home is pressed anywhere but at the
very beginning of non-whitespace characters on a line, the cursor will
jump to that beginning (either forwards or backwards). If the cursor is
already at that position, it will jump to the true beginning of the
line.
set softwrap
Display lines that exceed the screen’s width over multiple screen lines.
(You can make this soft-wrapping occur at whitespace instead of rudely at
the screen’s edge, by using also set atblanks.)
set speller "program [argument …]"
Use the given program to do spell checking and correcting.
See --speller for details.
set spotlightcolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for highlighting a search match.
The default value is black,lightyellow.
See set keycolor for valid color names.
set stateflags
Use the top-right corner of the screen for showing some state flags:
I when auto-indenting, M when the mark is on, L when
hard-wrapping (breaking long lines), R when recording a macro,
and S when soft-wrapping.
When the buffer is modified, a star (*) is shown after the
filename in the center of the title bar.
set statuscolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for the status bar.
See set keycolor for valid color names.
set stripecolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for the vertical guiding stripe.
See set keycolor for valid color names.
set suspendable
Obsolete option; ignored. Suspension is enabled by default,
reachable via ^T^Z. (If you want a plain ^Z to
suspend nano, add bind ^Z suspend main to your nanorc.)
set tabsize number
Use a tab size of number columns. The value of number must be
greater than 0. The default value is 8.
set tabstospaces
Convert each typed tab to spaces — to the number of spaces
that a tab at that position would take up.
set titlecolor [bold,][italic,]fgcolor,bgcolor
Use this color combination for the title bar.
See set keycolor for valid color names.
set trimblanks
Remove trailing whitespace from wrapped lines when automatic
hard-wrapping occurs or when text is justified.
set unix
Save a file by default in Unix format. This overrides nano’s
default behavior of saving a file in the format that it had.
(This option has no effect when you also use set noconvert.)
set whitespace "characters"
Set the two characters used to indicate the presence of tabs and
spaces. They must be single-column characters. The default pair
for a UTF-8 locale is "»·", and for other locales ">.".
set wordbounds
Detect word boundaries differently by treating punctuation
characters as part of a word.
set wordchars "characters"
Specify which other characters (besides the normal alphanumeric ones)
should be considered as parts of words. When using this option, you
probably want to unset wordbounds.
set zap
Let an unmodified Backspace or Delete erase the marked region
(instead of a single character, and without affecting the cutbuffer).
set zero
Hide all elements of the interface (title bar, status bar, and help lines)
and use all rows of the terminal for showing the contents of the buffer.
The status bar appears only when there is a significant message,
and disappears after 1.5 seconds or upon the next keystroke.
With M-Z the title bar plus status bar can be toggled.
With M-X the help lines.
8.2 Syntax Highlighting
Coloring the different syntactic elements of a file
is done via regular expressions (see the color command below).
This is inherently imperfect, because regular expressions are not
powerful enough to fully parse a file. Nevertheless, regular
expressions can do a lot and are easy to make, so they are a
good fit for a small editor like nano.
See /usr/share/nano/ and /usr/share/nano/extra/
for the syntax-coloring definitions that are available out of the box.
All regular expressions in nano are POSIX extended regular expressions
(ERE). This means that ., ?, *, +, ^,
$, and several other characters are special.
The period . matches any single character,
? means the preceding item is optional,
* means the preceding item may be matched zero or more times,
+ means the preceding item must be matched one or more times,
^ matches the beginning of a line, and $ the end,
\< matches the start of a word, and \> the end,
and \s matches a blank.
It also means that lookahead and lookbehind are not possible.
A complete explanation can be found in the manual of GNU grep:
info grep regular.
A separate syntax can be defined for each kind of file
via the following commands in a nanorc file:
syntax name ["fileregex" …]
Start the definition of a syntax with this name.
All subsequent color and other such commands
will be added to this syntax, until a new syntax
command is encountered.
When nano is run, this syntax will be automatically
activated if the current filename matches the extended regular
expression fileregex. Or the syntax can be explicitly
activated by using the -Y or --syntax
command-line option followed by the name.
The default syntax is special: it takes no fileregex,
and applies to files that don’t match any syntax’s regexes.
The none syntax is reserved; specifying it on the
command line is the same as not having a syntax at all.
header "regex" …
If from all defined syntaxes no fileregex matched, then compare
this regex (or regexes) against the first line of the current file,
to determine whether this syntax should be used for it.
magic "regex" …
If no fileregex matched and no header regex matched
either, then compare this regex (or regexes) against the
result of querying the magic database about the current
file, to determine whether this syntax should be used for it.
(This functionality only works when libmagic is installed
on the system and will be silently ignored otherwise.)
formatter program [argument …]
Run the given program on the full contents of the current buffer.
(The current buffer is written out to a temporary file, the program is
run on it, and then the temporary file is read back in, replacing the
contents of the buffer.)
linter program [argument …]
Use the given program to do a syntax check on the current buffer.
comment "string"
Use the given string for commenting and uncommenting lines.
If the string contains a vertical bar or pipe character (|),
this designates bracket-style comments; for example, "/*|*/" for
CSS files. The characters before the pipe are prepended to the line and the
characters after the pipe are appended at the end of the line. If no pipe
character is present, the full string is prepended; for example, "#" for
Python files. If empty double quotes are specified, the comment/uncomment
functions are disabled; for example, "" for JSON.
The default value is "#".
tabgives "string"
Make the <Tab> key produce the given string. Useful for languages like
Python that want to see only spaces for indentation.
This overrides the setting of the tabstospaces option.
color [bold,][italic,]fgcolor,bgcolor "regex" …
Paint all pieces of text that match the extended regular expression "regex"
with the given foreground and background colors, at least one of which must
be specified. Valid color names are:
red, green, blue,
magenta, yellow, cyan,
white, and black.
Each of these eight names may be prefixed with the word
light to get a brighter version of that color.
The word grey or gray may be used
as a synonym for lightblack.
On terminal emulators that can do at least 256 colors,
other valid (but unprefixable) color names are:
pink, purple, mauve,
lagoon, mint, lime,
peach, orange, latte,
rosy, beet, plum, sea,
sky, slate, teal, sage,
brown, ocher, sand, tawny,
brick, crimson, and normal
— where normal means the default foreground or background color.
On such emulators, the color may also be specified as a three-digit hexadecimal
number prefixed with #, with the digits representing the amounts of red,
green, and blue, respectively. This tells nano to select from the
available palette the color that approximates the given values.
The color pair may be preceded by bold and/or italic
(separated by commas) to get a bold and/or slanting typeface,
if your terminal can do those.
All coloring commands are applied in the order in which they are specified,
which means that later commands can recolor stuff that was colored earlier.
icolor [bold,][italic,]fgcolor,bgcolor "regex" …
Same as above, except that the matching is case insensitive.
color [bold,][italic,]fgcolor,bgcolor start="fromrx" end="torx"
Paint all pieces of text whose start matches extended regular expression
"fromrx" and whose end matches extended regular expression "torx" with
the given foreground and background colors, at least one of
which must be specified. This means that, after an initial instance of
"fromrx", all text until the first instance of "torx" will be colored.
This allows syntax highlighting to span multiple lines.
Same as above, except that the matching is case insensitive.
include "syntaxfile"
Read in self-contained color syntaxes from "syntaxfile". Note that
"syntaxfile" may contain only the above commands, from syntax
to icolor.
extendsyntax namecommandargument …
Extend the syntax previously defined as "name" with another command.
This allows you to add a new color, icolor, header,
magic, formatter, linter, comment,
or tabgives command to an already
defined syntax — useful when you want to slightly improve a syntax defined
in one of the system-installed files (which normally are not writable).
8.3 Rebinding Keys
Key bindings can be changed via the following three commands in a
nanorc file:
bind key function menu
Rebinds key to function in the context of menu
(or in all menus where the function exists when all is used).
bind key "string" menu
Makes key produce string in the context of menu
(or in all menus where the key exists when all is used).
The string can consist of text or commands or a mix of them.
(To enter a command into the string, precede its keystroke
with M-V.)
unbind key menu
Unbinds key from menu
(or from all menus where the key exists when all is used).
The format of key should be one of:
^X —— where X is a Latin letter, or one of several
ASCII characters (@, ], \, ^, _), or the word "Space".
Example: ^C.
M-X —— where X is any ASCII character except [,
or the word "Space".
Example: M-8.
Sh-M-X —— where X is a Latin letter.
Example: Sh-M-U.
By default, each Meta+letter keystroke does the same as the corresponding
Shift+Meta+letter. But when any Shift+Meta bind is made, that will
no longer be the case, for all letters.
Fn —— where n is a numeric value from 1 to 24.
Example: F10.
(Often, F13 to F24 can be typed as F1 to F12
with Shift.)
Ins or Del.
Rebinding ^M (Enter) or ^I (Tab) is probably not a good idea.
Rebinding ^[ (Esc) is not possible, because its keycode
is the starter byte of Meta keystrokes and escape sequences.
Rebinding any of the dedicated cursor-moving keys (the arrows, Home, End,
PageUp and PageDown) is not possible.
On some terminals it’s not possible to rebind ^H (unless --raw
is used) because its keycode is identical to that of the Backspace key.
Valid names for the function to be bound are:
help
Invokes the help viewer.
cancel
Cancels the current command.
exit
Exits from the program (or from the help viewer or file browser).
writeout
Writes the current buffer to disk, asking for a name.
savefile
Writes the current file to disk without prompting.
insert
Inserts a file into the current buffer (at the current cursor position),
or into a new buffer when option multibuffer is set.
whereis
Starts a forward search for text in the current buffer — or for filenames
matching a string in the current list in the file browser.
wherewas
Starts a backward search for text in the current buffer — or for filenames
matching a string in the current list in the file browser.
findprevious
Searches the next occurrence in the backward direction.
findnext
Searches the next occurrence in the forward direction.
replace
Interactively replaces text within the current buffer.
cut
Cuts and stores the current line (or the marked region).
copy
Copies the current line (or the marked region) without deleting it.
paste
Pastes the currently stored text into the current buffer at the
current cursor position.
zap
Throws away the current line (or the marked region).
(This function is bound by default to Alt+Delete.)
chopwordleft
Deletes from the cursor position to the beginning of the preceding word.
(This function is bound by default to Shift+Ctrl+Delete. If your terminal
produces ^H for Ctrl+Backspace, you can make Ctrl+Backspace delete
the word to the left of the cursor by rebinding ^H to this function.)
chopwordright
Deletes from the cursor position to the beginning of the next word.
(This function is bound by default to Ctrl+Delete.)
cutrestoffile
Cuts all text from the cursor position till the end of the buffer.
mark
Sets the mark at the current position, to start selecting text.
Or, when it is set, unsets the mark.
location
Reports the current position of the cursor in the buffer:
the line, column, and character positions.
(The old name of this function, ’curpos’, is deprecated.)
wordcount
Counts and reports on the status bar the number of lines, words,
and characters in the current buffer (or in the marked region).
execute
Prompts for a program to execute. The program’s output will be inserted
into the current buffer (or into a new buffer when M-F is toggled).
speller
Invokes a spell-checking program, either the default hunspell
or GNU spell, or the one defined by --speller or
set speller.
formatter
Invokes a full-buffer-processing program (if the active syntax defines one).
linter
Invokes a syntax-checking program (if the active syntax defines one).
justify
Justifies the current paragraph (or the marked region).
A paragraph is a group of contiguous lines
that, apart from possibly the first line, all have the same indentation. The
beginning of a paragraph is detected by either this lone line with a differing
indentation or by a preceding blank line.
fulljustify
Justifies the entire current buffer (or the marked region).
indent
Indents (shifts to the right) the current line or the marked lines.
unindent
Unindents (shifts to the left) the current line or the marked lines.
comment
Comments or uncomments the current line or the marked lines,
using the comment style specified in the active syntax.
complete
Completes (when possible) the fragment before the cursor
to a full word found elsewhere in the current buffer.
left
Goes left one position (in the editor or browser).
right
Goes right one position (in the editor or browser).
up
Goes one line up (in the editor or browser).
down
Goes one line down (in the editor or browser).
scrollup
Scrolls the viewport up one row (meaning that the text slides down)
while keeping the cursor in the same text position, if possible.
(This function is bound by default to Alt+Up.
If Alt+Up does nothing on your Linux console, see the FAQ:
https://nano-editor.org/dist/latest/faq.html#4.1.)
scrolldown
Scrolls the viewport down one row (meaning that the text slides up)
while keeping the cursor in the same text position, if possible.
(This function is bound by default to Alt+Down.)
center
Scrolls the line with the cursor to the middle of the screen.
prevword
Moves the cursor to the beginning of the previous word.
nextword
Moves the cursor to the beginning of the next word.
home
Moves the cursor to the beginning of the current line.
end
Moves the cursor to the end of the current line.
beginpara
Moves the cursor to the beginning of the current paragraph.
endpara
Moves the cursor to the end of the current paragraph.
prevblock
Moves the cursor to the beginning of the current or preceding block of text.
(Blocks are separated by one or more blank lines.)
nextblock
Moves the cursor to the beginning of the next block of text.
pageup
Goes up one screenful.
pagedown
Goes down one screenful.
firstline
Goes to the first line of the file.
lastline
Goes to the last line of the file.
gotoline
Goes to a specific line (and column if specified). Negative numbers count
from the end of the file (and end of the line).
findbracket
Moves the cursor to the bracket (or brace or parenthesis, etc.) that matches
(pairs) with the one under the cursor. See set matchbrackets.
anchor
Places an anchor at the current line, or removes it when already present.
(An anchor is visible when line numbers are activated.)
prevanchor
Goes to the first anchor before the current line.
nextanchor
Goes to the first anchor after the current line.
prevbuf
Switches to editing/viewing the previous buffer when multiple buffers are open.
nextbuf
Switches to editing/viewing the next buffer when multiple buffers are open.
verbatim
Inserts the next keystroke verbatim into the file.
tab
Inserts a tab at the current cursor location.
enter
Inserts a new line below the current one.
delete
Deletes the character under the cursor.
backspace
Deletes the character before the cursor.
recordmacro
Starts the recording of keystrokes — the keystrokes are stored
as a macro. When already recording, the recording is stopped.
runmacro
Replays the keystrokes of the last recorded macro.
undo
Undoes the last performed text action (add text, delete text, etc).
redo
Redoes the last undone action (i.e., it undoes an undo).
refresh
Refreshes the screen.
suspend
Suspends the editor and returns control to the shell
(until you tell the process to resume execution with fg).
casesens
Toggles whether searching/replacing ignores or respects the case of
the given characters.
regexp
Toggles whether searching/replacing uses literal strings or regular expressions.
backwards
Toggles whether searching/replacing goes forward or backward.
older
Retrieves the previous (earlier) entry at a prompt.
newer
Retrieves the next (later) entry at a prompt.
flipreplace
Toggles between searching for something and replacing something.
flipgoto
Toggles between searching for text and targeting a line number.
flipexecute
Toggles between inserting a file and executing a command.
flippipe
When executing a command, toggles whether the current buffer (or marked
region) is piped to the command.
flipnewbuffer
Toggles between inserting into the current buffer and into a new
empty buffer.
flipconvert
When reading in a file, toggles between converting and not converting
it from DOS/Mac format. Converting is the default.
dosformat
When writing a file, switches to writing a DOS format (CR/LF).
macformat
When writing a file, switches to writing a Mac format.
append
When writing a file, appends to the end instead of overwriting.
prepend
When writing a file, ’prepends’ (writes at the beginning) instead of overwriting.
backup
When writing a file, creates a backup of the current file.
discardbuffer
When about to write a file, discard the current buffer without saving.
(This function is bound by default only when option --saveonexit
is in effect.)
browser
Starts the file browser (in the Read File and Write Out menus),
allowing to select a file from a list.
gotodir
Goes to a directory to be specified, allowing to browse anywhere
in the filesystem.
firstfile
Goes to the first file in the list when using the file browser.
lastfile
Goes to the last file in the list when using the file browser.
nohelp
Toggles the presence of the two-line list of key bindings at the bottom of the screen.
(This toggle is special: it is available in all menus except the help viewer
and the linter. All further toggles are available in the main menu only.)
zero
Toggles the presence of title bar and status bar.
constantshow
Toggles the constant display of the current line, column, and character positions.
softwrap
Toggles the displaying of overlong lines on multiple screen lines.
linenumbers
Toggles the display of line numbers in front of the text.
whitespacedisplay
Toggles the showing of whitespace.
nosyntax
Toggles syntax highlighting.
smarthome
Toggles the smartness of the Home key.
autoindent
Toggles whether a newly created line will contain the same amount of leading
whitespace as the preceding line — or as the next line if the preceding line
is the beginning of a paragraph.
cutfromcursor
Toggles whether cutting text will cut the whole line or just from the current cursor
position to the end of the line.
breaklonglines
Toggles whether long lines will be hard-wrapped to the next line.
(The old name of this function, ’nowrap’, is deprecated.)
tabstospaces
Toggles whether typed tabs will be converted to spaces.
mouse
Toggles mouse support.
Valid names for menu are:
main
The main editor window where text is entered and edited.
help
The help-viewer menu.
search
The search menu (AKA whereis).
replace
The ’search to replace’ menu.
replacewith
The ’replace with’ menu, which comes up after ’search to replace’.
yesno
The ’yesno’ menu, where the Yes/No/All/Cancel question is asked.
gotoline
The ’goto line (and column)’ menu.
writeout
The ’write file’ menu.
insert
The ’insert file’ menu.
browser
The ’file browser’ menu, for selecting a file to be opened or
inserted or written to.
whereisfile
The ’search for a file’ menu in the file browser.
gotodir
The ’go to directory’ menu in the file browser.
execute
The menu for inserting the output from an external command,
or for filtering the buffer (or the marked region) through
an external command, or for executing one of several tools.
(The old form of this menu name, ’extcmd’, is deprecated.)
spell
The menu of the integrated spell checker where the user can edit a misspelled word.
linter
The linter menu, which allows jumping through the linting messages.
all
A special name that encompasses all menus. For bind it means
all menus where the specified function exists; for unbind
it means all menus where the specified key exists.
9 Pico Compatibility
nano emulates Pico quite closely, but there
are some differences between the two editors:
Hard-Wrapping
Unlike Pico, nano does not automatically hard-wrap the current
line when it becomes overlong during typing. This hard-wrapping can be
switched on with the --breaklonglines option. With that option,
nano by default breaks lines at screen width minus eight columns,
whereas Pico does it at screen width minus six columns. You can make
nano do as Pico by using --fill=-6.
Scrolling
By default, nano will scroll just one line (instead of half
a screen) when the cursor is moved to a line that is just out of view.
And when paging up or down, nano keeps the cursor in the same
screen position as much as possible, instead of always placing it on the
first line of the viewport. The Pico-like behavior can be obtained
with the --jumpyscrolling option.
Edit Area
Pico never uses the line directly below the title bar, leaving it always
blank. nano includes this line in the editing area, in order
to not waste space, and because in this way it is slightly clearer where
the text starts. If you are accustomed to this line being empty, you can
get it back with the --emptyline option.
Interactive Replace
Instead of allowing you to replace either just one occurrence of a search
string or all of them, nano’s replace function is interactive: it
will pause at each found search string and query whether to replace this
instance. You can then choose Yes, or No (skip this one), or All (don’t
ask any more), or Cancel (stop with replacing).
Search and Replace History
When the option -H or --historylog is given (or set in
a nanorc file), text entered as search or replace strings is stored.
These strings can be accessed with the up/down arrow keys at their
respective prompts, or you can
type the first few characters and then use Tab to cycle through the
matching strings. A retrieved string can subsequently be edited.
Position History
When the option -P or --positionlog is given (or set in
a nanorc file), nano will store the position of the cursor
when you close a file, and will place the cursor in that position
again when you later reopen the file.
Current Cursor Position
The output of the "Display Cursor Position" command (^C) displays
not only the current line and character position of the cursor,
but also (between the two) the current column position.
Spell Checking
In the internal spell checker misspelled words are sorted alphabetically
and trimmed for uniqueness, such that the words ’apple’ and ’Apple’ will
be prompted for correction separately.
Writing Selected Text to Files
When using the Write-Out key (^O), text that has been selected using the
marking key (^^) can not just be written out to a new (or existing) file,
it can also be appended or prepended to an existing file.
Reading Text from a Command
When using the Read-File key (^R), nano can not just read a file,
it can also read the output of a command to be run (^X).
Reading from Working Directory
By default, Pico will read files from the user’s home directory (when
using ^R), but it will write files to the current working directory
(when using ^O). nano makes this symmetrical: always reading
from and writing to the current working directory — the directory
that nano was started in.
File Browser
In the file browser, nano does not implement the Add, Copy,
Rename, and Delete commands that Pico provides. In nano the
browser is just a file browser, not a file manager.
Toggles
Many options which alter the functionality of the program can be
"toggled" on or off using Meta key sequences, meaning the program does
not have to be restarted to turn a particular feature on or off.
See Feature Toggles for a list of options that can be toggled.
Or see the list at the end of the main internal help text (^G) instead.
10 Building and its Options
Building nano from source is straightforward if you are
familiar with compiling programs with autoconf support:
tar -xf nano-x.y.tar.gz
cd nano-x.y
./configure
make
make install
The possible options to ./configure are:
--disable-browser
Exclude the file browser that can be called with ^T when
wanting to read or write a file.
--disable-color
Exclude support for syntax coloring. This also eliminates the -Y
command-line option, which allows choosing a specific syntax.
--disable-comment
Exclude the single-keystroke comment/uncomment function (M-3).
--disable-extra
Exclude the Easter egg: a crawl of major contributors.
--disable-help
Exclude the help texts (^G). This makes the binary much smaller,
but also makes it difficult for new users to learn more than very basic
things about using the editor.
--disable-histories
Exclude the code for handling the history files: the search and
replace strings that were used, the commands that were executed,
and the cursor position at which each file was closed.
This also eliminates the -H and -P command-line
options, which switch on the storing of search/replace strings,
executed commands, and cursor positions.
--disable-justify
Exclude the text-justification functions (^J and M-J).
--disable-libmagic
Exclude the code for using the library of magic-number tests (for
determining the file type and thus which syntax to use for coloring —
in most cases the regexes for filename and header line will be enough).
--disable-linenumbers
Exclude the ability to show line numbers. This also eliminates
the -l command-line option, which turns line numbering on.
--disable-mouse
Exclude all mouse functionality. This also eliminates the -m
command-line option, which enables the mouse functionality.
--disable-multibuffer
Exclude support for opening multiple files at a time and switching
between them. This also eliminates the -F command-line option,
which causes a file to be read into a separate buffer by default.
--disable-nanorc
Exclude support for reading the nanorc files at startup. With such
support, you can store custom settings in a system-wide and a per-user
nanorc file rather than having to pass command-line options to get
the desired behavior. See Nanorc Files for more info.
Disabling this also eliminates the -I command-line option,
which inhibits the reading of nanorc files.
--disable-operatingdir
Exclude the code for setting an operating directory. This also eliminates
the -o command-line option, which sets the operating directory.
--disable-speller
Exclude the code for spell checking. This also eliminates the -s
command-line option, which allows specifying an alternate spell checker.
--disable-tabcomp
Exclude tab completion (when nano asks for a filename or search string
or replace string or command to execute).
--disable-wordcomp
Exclude word completion (^]).
--disable-wrapping
Exclude all hard-wrapping of overlong lines. This also eliminates the
-b and -w command-line options, which switch automatic
long-line wrapping on and off, respectively.
--enable-tiny
This option implies all of the above. It also disables some other
internals of the editor, like the function toggles, the marking of text,
the undo/redo code, line anchors, the recording and playback of a macro,
softwrapping, and the cut-to-end-of-line code. These things stay disabled
also when using the enabling counterpart of the above options together with
--enable-tiny to switch specific features back on.
--enable-debug
Include some code for runtime debugging output. This can get messy, so
chances are you only want this feature when you’re working on the nano source.
--disable-nls
Exclude Native Language support. This will disable the use of any
available GNU nano translations.
--enable-utf8
Include support for handling and displaying Unicode files.
This requires a "wide" version of the curses library.
--disable-utf8
Exclude support for handling and displaying Unicode files. Normally the
configure script auto-detects whether to enable UTF-8 support or not.
You can use this or the previous option to override that detection.
--enable-altrcname=name
Use the file with the given name (in the user’s home directory)
as nano’s settings file, instead of the default .nanorc.