1SYSTEMD-REMOUNT-FS.SERVICE(s8y)stemd-remount-fs.serviScYeSTEMD-REMOUNT-FS.SERVICE(8)
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6 systemd-remount-fs.service, systemd-remount-fs - Remount root and
7 kernel file systems
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10 systemd-remount-fs.service
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12 /usr/lib/systemd/systemd-remount-fs
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15 systemd-remount-fs.service is an early boot service that applies mount
16 options listed in fstab(5), or gathered from the partition table (when
17 systemd-gpt-auto-generator(8) is active) to the root file system, the
18 /usr/ file system, and the kernel API file systems. This is required so
19 that the mount options of these file systems — which are pre-mounted by
20 the kernel, the initial RAM disk, container environments or system
21 manager code — are updated to those configured in /etc/fstab and the
22 other sources. This service ignores normal file systems and only
23 changes the root file system (i.e. /), /usr/, and the virtual kernel
24 API file systems such as /proc/, /sys/ or /dev/. This service executes
25 no operation if no configuration is found (/etc/fstab does not exist or
26 lists no entries for the mentioned file systems, or the partition table
27 does not contain relevant entries).
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29 For a longer discussion of kernel API file systems see API File
30 Systems[1].
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32 Note: systemd-remount-fs.service is usually pulled in by systemd-fstab-
33 generator(8), hence it is also affected by the kernel command line
34 option fstab=, which may be used to disable the generator. It may also
35 pulled in by systemd-gpt-auto-generator(8), which is affected by
36 systemd.gpt_auto and other options.
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39 systemd(1), fstab(5), mount(8), systemd-fstab-generator(8), systemd-
40 gpt-auto-generator(8)
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43 1. API File Systems
44 https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
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48systemd 251 SYSTEMD-REMOUNT-FS.SERVICE(8)