A good backup system can help you recover from a lot of different kinds of situations: a botched upgrade (requiring re-installation), a hard drive crash, or even thumb-fingered users deleting the wrong file. In practice, though I’ve experienced all of these, it’s the last sort of problem that causes me the most pain. Sometimes you just wish you could go back a few days in time and grab that file. What you want is something like the Internet Archive’s “Wayback Machine”, but for your own system. Here’s how to set one up using the rsnapshot package (included in the Debian and Ubuntu distributions).

Suppose you’ve been good (or sort of good anyway), and you have a huge stack of CD-ROMs (or DVDs) with backups and archives of your old files. Great. But how can you find anything? I solved this problem today by making an index of all the files stored on these disks using a few simple GNU command line tools.

Backup, like security, is a well-worn mantra in the world of GNU/Linux—and even the most battle-hardened, street-wise user has, for whatever reason, thought about regular backups after disaster has already struck. It is an all too familiar story. System Administrators, by the very nature of their work, will have that imperative carved on their headstones. For them it will be a way of life. Desktop users, being responsible only for themselves, can afford to be a little more louche about such things. If it all goes a bit “arms in the air” there is no one to reproach them but themselves.