man/systemd.snapshot.5

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  22 .SH "NAME"
  23 systemd.snapshot \- Snapshot unit configuration
  24 .SH "SYNOPSIS"
  25 .PP
  26 \fIsnapshot\fR\&.snapshot
  27 .SH "DESCRIPTION"
  28 .PP
  29 Snapshot units are not configured via unit configuration files\&. Nonetheless they are named similar to filenames\&. A unit whose name ends in
  30 "\&.snapshot"
  31 refers to a dynamic snapshot of the systemd runtime state\&.
  32 .PP
  33 Snapshots are not configured on disk but created dynamically via
  34 \fBsystemctl snapshot\fR
  35 (see
  36 \fBsystemctl\fR(1)
  37 for details) or an equivalent command\&. When created, they will automatically get dependencies on the currently activated units\&. They act as saved runtime state of the systemd manager\&. Later on, the user may choose to return to the saved state via
  38 \fBsystemctl isolate\fR\&. They are useful to roll back to a defined state after temporarily starting/stopping services or similar\&.
  39 .SH "SEE ALSO"
  40 .PP
  41 \fBsystemd\fR(1),
  42 \fBsystemctl\fR(1),
  43 \fBsystemd.unit\fR(5),
  44 \fBsystemd.directives\fR(7)