Software: nginx/1.23.4. PHP/5.6.40-65+ubuntu20.04.1+deb.sury.org+1 

uname -a: Linux foro-restaurado-2 5.15.0-1040-oracle #46-Ubuntu SMP Fri Jul 14 21:47:21 UTC 2023
aarch64 

uid=33(www-data) gid=33(www-data) groups=33(www-data) 

Safe-mode: OFF (not secure)

/usr/src/linux-oracle-headers-5.15.0-1040/tools/testing/selftests/mount/   drwxr-xr-x
Free 83.31 GB of 96.73 GB (86.13%)
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Viewing file:     run_unprivileged_remount.sh (285 B)      -rwxr-xr-x

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4

# Run mount selftests
if [ -f /proc/self/uid_map ] ; then
	./unprivileged-remount-test ;
else
	echo "WARN: No /proc/self/uid_map exist, test skipped." ;
	exit $ksft_skip
fi