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 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)