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本文转自：http://hi.baidu.com/visual_art/item/6713e2091b41ea33a2332a15

#!/bin/bash
#This is a ShellScript For Auto DB Backup
#Powered by SearchDatabase
#2005-09

#Setting
#配置数据库名，数据库登录名，密码，备份路径，日志路径，数据文档位置，连同备份方式
#默认情况下备份方式是tar，还能够是mysqldump,mysqldotcopy
#默认情况下，用root(空)登录mysql数据库，备份至/root/dbxxxxx.tgz
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 $DBName > $DumpFile
fi
tar czvf $NewFile $DumpFile >> $LogFile 2>&1
echo “[$NewFile]Backup Success!” >> $LogFile
rm -rf $DumpFile
;;
mysqlhotcopy)
rm -rf $DumpFile
mkdir $DumpFile
if [ -z $DBPasswd ]
then
mysqlhotcopy -u $DBUser $DBName $DumpFile >> $LogFile 2>&1
else
mysqlhotcopy -u $DBUser -p $DBPasswd $DBName $DumpFile >>$LogFile 2>&1
fi
tar czvf $NewFile $DumpFile >> $LogFile 2>&1
echo “[$NewFile]Backup Success!” >> $LogFile
rm -rf $DumpFile
;;
*)
/etc/init.d/mysqld stop >/dev/null 2>&1
tar czvf $NewFile $DBPath$DBName >> $LogFile 2>&1
/etc/init.d/mysqld start >/dev/null 2>&1
echo “[$NewFile]Backup Success!” >> $LogFile
;;
esac
fi

echo “——————————————-” >> $LogFile

还可以参考：定时每天备份mysql并定时删除上月记录（脚本）

http://hi.baidu.com/52xjm/blog/item/de3ce916262a5f02972b43e7.html

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。

#!/bin/bash

#This is a ShellScript For Auto DB Backup

#Powered by aspbiz

#2004-09

#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，

#以及备份方式

#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

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 $DBName > $DumpFile

      fi

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

      echo “[$NewFile]Backup Success!” >> $LogFile

      rm -rf $DumpFile

      ;;

   mysqlhotcopy)

      rm -rf $DumpFile

      mkdir $DumpFile

      if [ -z $DBPasswd ]

      then

         mysqlhotcopy -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>&1

      echo “[$NewFile]Backup Success!” >> $LogFile

      rm -rf $DumpFile

      ;;

   *)

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

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

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

      echo “[$NewFile]Backup Success!” >> $LogFile

      ;;

   esac

fi

echo “——————————————-” >> $LogFile

以上资料来源于网络！