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   systemd-volatile-root.service    ( 8 )

сделайте корневую файловую систему изменчивой (Make the root file system volatile)

Имя (Name)

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

Синопсис (Synopsis)

systemd-volatile-root.service


       /usr/lib/systemd/systemd-volatile-root

Описание (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.

Смотри также (See also)

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