'\" t .TH "SYSTEMD\-VOLATILE\-ROOT\&.SERVICE" "8" "" "systemd 256.8" "systemd-volatile-root.service" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" http://bugs.debian.org/507673 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .SH "NAME" systemd-volatile-root.service, systemd-volatile-root \- Make the root file system volatile .SH "SYNOPSIS" .PP systemd\-volatile\-root\&.service .PP /usr/lib/systemd/systemd\-volatile\-root .SH "DESCRIPTION" .PP 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\&. .PP 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\*(Aqs 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\&. .SH "SEE ALSO" .PP \fBsystemd\fR(1), \fBsystemd-fstab-generator\fR(8), \fBkernel-command-line\fR(7)