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Linux® Desk Reference, Second Edition by Scott Hawkins

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Backup Levels

The UNIX world has adopted the concept of numeric backup levels to describe which files are being saved in a given backup.

Level Meaning
0 Full backup of all files.
1 Backup of all files modified since the last time a level 0 backup was performed.
2 Backup of all files modified since the most recent level 1 backup.

At some point in your life, your computer will crash, and you will lose all the data on it. Whether this is a temporary inconvenience or the first step down the road to suicide is entirely dependent on your level of preparation. Right now, right this second, you should think about what you have on your machine that you ...

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