Mastering Linux, part 18

Spiga, Jarrod
May 2006
APC (Bauer Media Group);May2006, Vol. 26 Issue 5, p122
The article presents information on the need of keeping backup of all critical data. Jarrod Spiga, a network engineer, says that backups of all critical data should be performed frequently because the risk of disaster persists. A tar archive stores all files in a sequential manner and preserves directory structures and file system permissions. The format was originally designed to store data appropriately on tape backup devices, where all data must be stored in a sequential fashion. The GZip utility only has the ability to compress a single file into a compressed archive. Using both tar and GZip allows you to compress a large number of files and directories into a single archive, while preserving file-system permissions and the directory structure. Whenever one creates a new archive, it's prudent to test the archive to ensure that tar can recover the data stored within it. One of the most difficult aspects of backing up is knowing what data to include. On a Windows XP system, most would back up as much of the obvious user data as possible.


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