systemd-volatile-root.service(8) - phpMan

SYSTEMD-VOLATILE-ROOT.SERVICE(8)  systemd-volatile-root.service  SYSTEMD-VOLATILE-ROOT.SERVICE(8)

NAME
       systemd-volatile-root.service, systemd-volatile-root - Make the root file system volatile

SYNOPSIS
       systemd-volatile-root.service

       /lib/systemd/systemd-volatile-root

DESCRIPTION
       systemd-volatile-root.service is a service that replaces the root directory with a
       volatile memory file system ("tmpfs"), mounting the original (non-volatile) /usr/ inside
       it read-only. This way, vendor data from /usr/ is available as usual, but all
       configuration data in /etc/, all state data in /var/ and all other resources stored
       directly under the root directory are reset on boot and lost at shutdown, enabling fully
       stateless systems.

       This service is only enabled if full volatile mode is selected, for example by specifying
       "systemd.volatile=yes" on the kernel command line. This service runs only in the initial
       RAM disk ("initrd"), before the system transitions to the host's root directory. Note that
       this service is not used if "systemd.volatile=state" is used, as in that mode the root
       directory is non-volatile.

SEE ALSO
       systemd(1), systemd-fstab-generator(8), kernel-command-line(7)

systemd 249                                                      SYSTEMD-VOLATILE-ROOT.SERVICE(8)

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