remote backup to tape

#Server

  useradd backup
su - backup
ssh-keygen -t rsa
mv .ssh/id_dsa.pub .ssh/authorized_keys
mt -f /dev/st0 rewind
chown backup /bin/st0

#copy your key to client
(use vi to copy and past) or scp etc..

#Client

  vi backup.sh
#!/bin/sh
#remote backup to tape
#Author: Yu-Jen Chen
filename="www_"`date +%Y%m%d_%H%M%S`".tar.gz"
remote="203.64.178.107"
tar -zcf $filename /var/www/html/
scp -i id_rsa $filename backup@$remote:~
ssh -i id_rsa backup@$remote "tar -rvf /dev/st0 "$filename

#set crontab

 crontab -e
0 3 15,30 * * /var/www/backup/backup.sh