Mysql for linux mysql自动备份脚本

可以将这个脚本放进crontab，他的配制文件在 /etc/crontab中每天凌晨执行一次，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/namexxxxx.tgz
DBName=mysql
DBUser=root
DBPasswd=password
BackupPath=/root/
LogFile=/root/db.log
DBPath=/var/local/mysql5/var/
#BackupMethod=mysqldump
#BackupMethod=mysqlhotcopy
#BackupMethod=tar
#Setting End

NewFile="$BackupPath""$DBName"$(date +%y%m%d).tgz
DumpFile="$BackupPath""$DBName"$(date +%y%m%d)
OldFile="$BackupPath""$DBName"$(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 

其他手动备份
mysqldump -uroot -p(密码) 数据名称 > 数据名称.sql
例：mysqldump -uroot -plingzhong emlog > emlog.sql
还原
mysql -uroot -p(密码) 数据名 < 数据名.sql