I use loop-aes. http://loop-aes.sf.net/ It's good for swap, as well as for filesystems.
Not to hijack the thread too much, but has anybody come across something similar (i.e. a loopback device) for compressed filesystems? I've read about squash/cramFS, but it seems with those you end up with a read-only filesystem? I keep several days of online backups using rsync/hard-links (http://www.mikerubel.org/computers/rsync_snapshots/), and I could save lots of space if the diffs were compressed. In this case I have DVD-based backups as well, and saving space on these non-critical online backups would let me keep more days of backups available at once. Regards, Mike -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml