linux 增量备份脚本,保留7天

周一全量其他时间为增量，删除七天前的备份

#!/bin/sh
week=`date "+%u"`
today=`date "+%Y%m%d"`
source=/source
backup=/backup

cd $backup

if [ $week -eq 1 ]; then
rm -rf snapshot
tar -g snapshot -zcPf "full$today.tar.gz" $source
else
tar -g snapshot -zcPf "inc$today.tar.gz" $source
fi
find /miniobackup -name "*.tar.gz" -mtime +7 -exec rm -rf {} \;