linux自动备份shell(使用全备份,增量备份策略)

在cron里设置,每周一凌晨2点执行(每周一全备份,其余时间增量备份)

#vi backup.sh

#!/bin/bash

# define
dayofweek=`date "+%u"`
today=`date "+%Y%m%d"`
source=/data/
backup=/backup/

# action
cd $backup

if [ $dayofweek -eq 1 ]; then
　　if [ ! -f "full$today.tar.gz" ]; then
　　　　rm -rf snapshot
　　　　tar -g snapshot -zcf "full$today.tar.gz" $source --exclude $sourceserver.log
　　fi
else
　　if [ ! -f "inc$today.tar.gz" ]; then
　　　　tar -g snapshot -zcf "inc$today.tar.gz" $source --exclude $sourceserver.log
　　fi
fi