Fedora Linux

 growisofs -Z /dev/dvd -RJz /tmp/zftree /system-*
 # Eject the disc
 eject
else
 echo 'Skipping burn: snapshot or file compression failed.'
fi
# Delete the zftree
rm -rf /tmp/zftree 2>/dev/null
) 2>&1|mail -s 'Backup Log $(hostname)' backup-alert

Each LV to be backed up must have a mount point identified in /etc/fstab.

6.3.3.2. ...putting more than one backup on a tape?

The device node /dev/st0 is the default (first) tape drive on the system, configured to rewind after each use. /dev/nst0 is the same device but without the automatic rewind.

In order to position the tape, Fedora provides the mt command, described in Table 6-7 .

Table 6-7. mt tape control commands

mt command	Description
mt rewind	Rewinds the tape
mt fsf	Forward-skips a file
mt fsf count	Forward-skips count files
mt bsf	Backward-skips a file
mt bsf count	Backward-skips count files
mt status	Displays the drive status
mt offline or mt eject	Rewinds and ejects the tape (if possible)

The mt command uses /dev/tape as its default device; create this as a symbolic link to /dev/nst0 if it does not already exist:

# ln -s /dev/nst 0 /dev/tape

You can now create a multibackup tape:

# mt rewind
# tar cvzf /dev/tape /home
# tar cvzf /dev/tape /etc
# mt rewind

To read a specific backup on a multibackup tape, rewind to the beginning (just to be sure you're at the start), and then skip any files (backups) necessary to reach the archive you want. These commands will access the table of contents for the second archive, for example:

# mt rewind
# mt fsf
# tar tvzf /dev/tape
etc/
etc/smrsh/
etc/smrsh/mailman
etc/group-
etc/gnopernicus-1.0/
etc/gnopernicus-1.0/translation_tables/
...(Lines snipped)...

6.3.3.3. ...backing up multiple systems onto a central tape archive?

Fedora Core includes amanda , a powerful client-server tape backup system that can be used for this purpose. See the amanda manpages for details.