How to tar backup on tape through ssh

# tar -cvzf /www | ssh root@station.domain.com "cat > /backup/www.tar.gz"

OR

# tar zcvf - /www | ssh root@192.168.1.101 "cat > /backup/www.tar.gz"

Output:

tar: Removing leading `/' from member names

/www/

/www/n/xx.in/

/www/c/zasx.asd/

....

..

You can also use dd command for clarity purpose:

# tar cvzf - /www | ssh root@192.168.1.101 "dd of=/backup/www.tar.gz"

It is also possible to dump backup to remote tape device:

# tar cvzf - /www | ssh ssh root@192.168.1.101 "cat > /dev/st0"

OR

you can use mt to rewind tape and then dump it using cat command:

# tar cvzf - /www | ssh ssh root@192.168.1.101 $(mt -f /dev/st0 rewind; cat > /dev/st0)$

You can restore tar backup over ssh session:

# ssh root@192.168.1.101 "cat /backup/www.tar.gz" | tar zxvf -