systemd-remount-fs.service, systemd-remount-fs — Remount root and kernel file systems
systemd-remount-fs.service is an early boot service that applies mount options
listed in fstab(5), or
gathered from the partition table (when
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
/etc/fstab and the other sources. This service ignores normal file
systems and only changes the root file system (i.e.
and the virtual kernel API file systems such as
/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.
systemd-remount-fs.service is usually pulled in by
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
which is affected by
systemd.gpt_auto and other options.