backup and restore of persistent overlay data

[Nio Wiklund]

Hi everybody,

The casper-rw or live-rw partition that stores persistent overlay data
is easily damaged, particularly if you remove the pendrive before it is
unmounted. Therefore it is important to have a convenient way to backup
and restore the persistent data. This is implemented in mkusb 10.3.4
with shell-scripts to make it easy to backup and restore the overlayed
persistent data of the persistent live system created by mkusb.

https://help.ubuntu.com/community/mkusb#Backup_and_restore_of_persistent_overlay_data

Best regards
Nio