系統(tǒng)中比較重要的目錄有/etc,/home,/var/spool/mail等，每天2:45進(jìn)行備份，備份數(shù)據(jù)存到/backup中，并用tar將備份數(shù)據(jù)打包
#mkdir /root/bin; vim /root/bin/backup.sh
#!/bin/bash
backdir="/etc /home /root /var//spool/mail"
basedir=/backup
[! -d "$basedir"] && mkdir $basedir
backfile=$basedir/backup.tar.gz
tar -zcvf $backfile $backdir
#vim /etc/crontab
45 2 * * * root sh /root/bin/backup.sh
