SYSTEMD-VOLATILE-ROOT.SERVICE(8) 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)

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