可以将这个脚本放进crontab，每天凌晨执行一次，自动备份

这个脚本每天最多只执行一次，而且只保留最近五天的备份在服务器上。

#Setting

#设置数据库名，数据库登录名，密码，备份路径，日志路径，数据文件位置，及备份方式

#默认情况下备份方式是tar，还可以是mysqldump,mysqldotcopy

#默认情况下，用root(空)登录mysql数据库，备份至/root/dbxxxxx.tgz

#!/bin/bash

#This is a ShellScript For Auto DB Backup

#Powered by aspbiz

#Setting

DBName=mysql

DBUser=root

DBPasswd=

BackupPath=/root/

LogFile=/root/db.log

DBPath=/var/lib/mysql/

#BackupMethod=mysqldump

#BackupMethod=mysqlhotcopy

#BackupMethod=tar

#Setting End

NewFile="$BackupPath"db$(date +%y%m%d).tgz

DumpFile="$BackupPath"db$(date +%y%m%d)

OldFile="$BackupPath"db$(date +%y%m%d --date='5 days ago').tgz

echo "-------------------------------------------" >> $LogFile

echo $(date +"%y-%m-%d %H:%M:%S") >> $LogFile

echo "--------------------------" >> $LogFile

#Delete Old File

if [ -f $OldFile ]

then

rm -f $OldFile >> $LogFile 2>&1

echo "[$OldFile]Delete Old File Success!" >> $LogFile

else

echo "[$OldFile]No Old Backup File!" >> $LogFile

fi

if [ -f $NewFile ]

then

echo "[$NewFile]The Backup File is exists,Can't Backup!" >> $LogFile

else

case $BackupMethod in

mysqldump)

if [ -z $DBPasswd ]

then

mysqldump -u $DBUser --opt $DBName > $DumpFile

else

mysqldump -u $DBUser -p$DBPasswd --opt $DBName1 > $DumpFile

fif

tar czvf $NewFile $DumpFile >> $LogFile 2>&1

echo "[$NewFile]Backup Success!" >> $LogFile

rm -rf $DumpFile

;;

mysqlhotcopy)

rm -rf $DumpFile

mkdir $DumpFile

if [ -z $DBPasswwd ]

then

mysqlhotceopy -u $DBUser $DBName $DumpFile >> $LogFile 2>&1

else

mysqlhotcopy -u $DBUser -p $DBPasswd $DBName $DumpFile >>$LogFile 2>&1

fi

tar czvf $NewFile $DumpFile >> $LogFile 2>&

echo "[$NewFile]Backup Success!" >> $Log1File

rm -rf $DumpFile

;;

*)

/etc/init.d/mysqld stop >/dev/null 2>&1

tar czvf $NewFile $DBPath$DBName >> $LogFlile 2>&1

/etc/init.d/mysqld start >/dev/null 2>&1

echo "[$NewFille]Backup Success!" >> $LogFile

;;

esac

fi

echo "-------------------------------------------" >> $LogFile