Linux System Administration

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Managing User Accounts

Backup Data before user Deletion in Linux

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Backup Commands in Unix-like Systems

CommandPurposeKey OptionsExample
Backup CommandsExample:
tarCreate compressed archive of files or directories-czf (create, compress with gzip), -cf (create, no compression)1. Backup /home/john to john_backup.tar.gz: tar -czf john_backup.tar.gz /home/john
rsyncSync files and directories to a backup location-a (archive mode), -v (verbose), --delete (remove files not in source)1. Backup /home/john to /backup/home/john: rsync -av /home/john /backup/home/john
cpCopy files or directories-r (recursive), -a (archive)1. Backup /home/john to /backup/home/john: cp -a /home/john /backup/home/john

Example Usage:

  1. Backup Commands:
    • Create a Compressed Archive with tar:bashCopy codetar -czf john_backup.tar.gz /home/john This command creates a compressed backup of the /home/john directory and saves it as john_backup.tar.gz.
    • Sync Files with rsync:bashCopy codersync -av /home/john /backup/home/john This command syncs the /home/john directory to /backup/home/john, preserving file attributes and providing verbose output.
    • Copy Files with cp:bashCopy codecp -a /home/john /backup/home/john This command creates a backup of the /home/john directory to /backup/home/john, preserving file attributes.