systemd-volatile-root.service(8) — Linux manual page

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

NAME

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

SYNOPSIS

       systemd-volatile-root.service

       /usr/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)

COLOPHON

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
       a bug report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-13.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

systemd 257~devel                                   SYSTEMD...SERVICE(8)

Pages that refer to this page: kernel-command-line(7), systemd.directives(7), systemd.index(7), systemd-fstab-generator(8)

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