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Showing posts from July, 2008

unix backup with tar and mt

Rewind tape drive: # mt -f /dev/st0 rewind Backup directory /www and /home with tar command (z - compressed): # tar -czf /dev/st0 /www /home Find out what block you are at with mt command: # mt -f /dev/st0 tell Display list of files on tape drive: # tar -tzf /dev/st0 Restore /www directory: # cd / # mt -f /dev/st0 rewind # tar -xzf /dev/st0 www Unload the tape: # mt -f /dev/st0 offline Display status information about the tape unit: # mt -f /dev/st0 status Erase the tape: # mt -f /dev/st0 erase You can go BACKWARD or FORWARD on tape with mt command itself: (a) Go to end of data: # mt -f /dev/nst0 eod (b) Goto previous record: # mt -f /dev/nst0 bsfm 1 (c) Forward record: # mt -f /dev/nst0 fsf 1

deleting message from postfix queue

To list the queue execute: mailq You can find the problematic messages id and the execute: find /var/spool/postfix -name "messegeID" | xargs rm