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doc: Add a minimal rd.live.overlay documentation

Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
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Fabian Deutsch 10 years ago
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  1. 12
      dracut.cmdline.7.asc

12
dracut.cmdline.7.asc

@ -838,6 +838,18 @@ can be found. By default, this is __LiveOS__. @@ -838,6 +838,18 @@ can be found. By default, this is __LiveOS__.
Copy the complete image to RAM and use this for booting. This is useful
when the image resides on i.e. a DVD which needs to be ejected later on.

**rd.live.overlay=**_<devspec>_:_(<pathspec>|auto)__
Allow the usage of a permanent overlay.
_<devspec>_ specifies the path to a device with a mountable filesystem.
_<pathspec>_ is the path to a file within that filesystem, which shall be used to
persist the changes made to the device specified by **root=live:__<url>__** option.
+
[listing]
.Example
--
rd.live.overlay=/dev/sdb1:persistent-overlay.img
--

**rd.live.overlay.thin=**1::
Enables the usage of thin snapshots instead of classic dm snapshots.
The advantage of thin snapshots is, that they support discards, and will free

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