Manual: systemd-remount-fs.service

SYSTEMD-REMOUNT-FS.SERVICE(8)			 systemd-remount-fs.service		       SYSTEMD-REMOUNT-FS.SERVICE(8)

NAME
       systemd-remount-fs.service, systemd-remount-fs - Remount root and kernel file systems

SYNOPSIS
       systemd-remount-fs.service

       /usr/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 initrd, 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 be 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://systemd.io/API_FILE_SYSTEMS

systemd 259.5										       SYSTEMD-REMOUNT-FS.SERVICE(8)