Tweaks for Knoppix 6.7.1

[utu]

An addendum to the personal backup/update*.tar.gz idea:

/mnt-system/restore.txt
Save thus to /mnt-system to help remind yourself how to restore
your persistent store if it becomes corrupted.

If the LiveUSB will not boot as usual, then start over
and at the 'boot:' prompt, input 'knoppix noimage' and knoppix
should boot with the original CD version of Knoppix 6.7.1.

After this has booted, then re-establish KNOPPIX-DATA with the
command, as root, 'tar -xzf update112410.tar.gz -C /',
assuming the saved update is 'update112410.tar.gz'.

Once that is completed, reboot again, and knoppix-data.img
should have been rolled-back to a former state.
Some recent changes in usr/ may not survive,
but all of home/ root/ etc/ & syslinux.cfg should be preserved.