**Warning**

This feature is fairly new. Most of the bugs are worked out, but there still are some quirks, especially with the web interface.

To use unionfs, you must use either runnix or the livecd and an image built from SVN 1319 or later. You'll also need a partition that is formatted as ext2.

Astlinux supports the user of a unionfs partition to overwrite any content on the read-only operating system image. This allows users to maintain persistent passwords through version upgrades among other things.

To use this feature, add the following to your boot line:

asturw=/dev/XdYZ

For example (assuming your unionfs partition is /dev/hda3) :

root=/dev/ram0 rw init=/linuxrc console=ttyS0,19200n8 astlinux=via astimg=astlinux-version.run astkd=/dev/hda2 asturw=/dev/hda3 astlive ide=nodma

Another option is to use the asturw partition and NOT an astkd partition. Simply remove the astkd line from the above boot line, and manually copy the contents of what would normally get copied onto the key disk. Eventually we'll add this to the genkd script.