LIVE-BOOT(1) Debian Live Project LIVE-BOOT(1)
live-snapshot - simple script to ease persistence usage
live-snapshot [-c|--cow DIRECTORY] [-d|--device DEVICE]
[-e|--exclude-list FILE] [-o|--output FILE] [-t|--type TYPE]
live-snapshot [-r|--resync-string STRING]
live-snapshot is a script which can be used to build the right types of
persistent image files supported by live-boot(7). It is also used on
exit by the live-boot init script to resync the boot-found snapshots
-c, --cow DIRECTORY
specifies the input directory to be cloned in the image file. Its
default value "/live/cow" should be right for most uses. However it
could be handy to specify "/home" and type ext2 for the type to
prepare an image file suited to be directly mounted by live-boot as
-d, --device DEVICE
sets the device where the media which the snapshot/persistence
file/partition will be put. If it is not specified, a tmpfs will be
used and linked to the user's desktop to move it where it is
needed. If the device has no filesystem, an ext2 fs will be auto‐
matically created and labelled according to the values specified
after the "--output" value or with a sane default.
-e, --exclude-list FILE
a file containing a list of filenames/paths that should not be
saved. This exclude list will be remebered on the target snapshot
media for reuse.
-o, --output FILE
the filename/label used for the output file/partition. If left
blank, live-snapshot will search for a proper file on the device or
use the whole partition.
-r, --resync-string STRING
internally used on resyncs.
try to do the same operation that should be done at reboot or halt,
resyncing boot-time auto discovered snapshots. Useful to prevent a
crash or surge power-off.
-t, --type TYPE
Type could be one of "cpio", "squashfs", "ext2", "ext3", "ext4", or
display help and exit.
show usage and exit.
output version information and exit.
Some variables can be configured via this config file (inside the
This optional file (inside the live media) contains a list of
white-space or carriage-return-separated file names corresponding
to disk images in the "/live" directory. If this file exists, only
images listed here will be merged into the root aufs, and they will
be loaded in the order listed here. The first entry in this file
will be the "lowest" point in the aufs, and the last file in this
list will be on the "top" of the aufs, directly below /cow. With‐
out this file, any images in the "/live" directory are loaded in
This optional file (which resides in the rootfs system, not in the
live media) is used as a list of directories which not need be per‐
sistent: ie. their content does not need to survive reboots when
using the persistence features.
This saves expensive writes and speeds up operations on volatile
data such as web caches and temporary files (like e.g. /tmp and
.mozilla) which are regenerated each time. This is achieved by bind
mounting each listed directory with a tmpfs on the original path.
This optional file, if present changes the behaviour of live-snap‐
shot: only files and directories listed there are included (inte‐
grally) in the snapshot. Beware, it is an experimental feature that
only works for cpio targets now.
More information about live-boot and the Debian Live project can be
found on the homepage at <http://live.debian.net/> and in the manual at
Bugs can be reported by submitting a bugreport for the live-boot pack‐
age in the Debian Bug Tracking System at <http://bugs.debian.org/> or
by writing a mail to the Debian Live mailing list at <debian-
live-boot was written by Daniel Baumann <email@example.com> for the
2.0.15 2011-02-01 LIVE-BOOT(1)