bash backup

#!/bin/sh

umount /mnt/backup

mount /dev/sdb1 /mnt/backup



if [ `date +%d` = '01' ] #每月1号进行完全备份

then

bakdir="/mnt/bak/daybak/month/"`date +%m%d`

zl="" #进行完全备份

else

backup_dir="/mnt/backup/"`date +%d`

zl="-N "`date +'%Y-%m-01 00:00:01'`; #差异备份

#zl="-N "`date -d '-1 day' +'%Y-%m-%d 00:00:01'` #日增量备份

fi



tar "${zl}" -czf ${backup_dir}/ /var/www

umount /mnt/backup