简单应用：一个Mysql自动备份脚本

#!/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