SYSTEMD-REMOUNT-FS.SERVICEsystemd-remount-fs.servSYSTEMD-REMOUNT-FS.SERVICE(8)
NAME
systemd-remount-fs.service, systemd-remount-fs - Remount root and
kernel file systems
SYNOPSIS
systemd-remount-fs.service
/lib/systemd/systemd-remount-fs
DESCRIPTION
systemd-remount-fs.service is an early boot service that applies mount
options listed in fstab(5), or gathered from the partition table (when
systemd-gpt-auto-generator(8) is active) to the root file system, the
/usr file system, and the kernel API file systems. This is required so
that the mount options of these file systems -- which are pre-mounted
by the kernel, the initial RAM disk, container environments or system
manager code -- are updated to those configured in /etc/fstab and the
other sources. This service ignores normal file systems and only
changes the root file system (i.e. /), /usr, and the virtual kernel
API file systems such as /proc, /sys or /dev. This service executes no
operation if no configuration is found (/etc/fstab does not exist or
lists no entries for the mentioned file systems, or the partition table
does not contain relevant entries).
For a longer discussion of kernel API file systems see API File
Systems[1].
Note: systemd-remount-fs.service is usually pulled in by systemd-fstab-
generator(8), hence it is also affected by the kernel command line
option fstab=, which may be used to disable the generator. It may also
pulled in by systemd-gpt-auto-generator(8), which is affected by
systemd.gpt_auto and other options.
SEE ALSO
systemd(1), fstab(5), mount(8), systemd-fstab-generator(8), systemd-
gpt-auto-generator(8)
NOTES
1. API File Systems
https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
systemd 245 SYSTEMD-REMOUNT-FS.SERVICE(8)