本地和异地ftp传输备份脚本及使用crontab定时自动执行

一、本地和异地ftp传输备份脚本           
'本地采用12小时一备同时上传异地
           
'文件备份目录创建auto_bak,我放在/usr/local/目录下           
[root@localhost local]#mkdir auto_bak           
[root@localhost local]#cd auto_bak           
           
'编写备份脚本           
[root@localhost auto_bak]#vi auto_bak_db.sh           
           
   #!/bin/sh           
   #delete old file           
   rm -rf /usr/local/auto_bak/dbname*           
              
   #backup the datebase file to              
   /usr/local/mysql/bin/mysqldump -u sa 123456 dbname >/usr/local/auto_bak/dbname.sql           
              
   #ftp the file to 192.168.0.11            
   #login in Ftp server and transfer the file           
     ftp -i -n <     open 192.168.0.11           
     user bak 123456           
              
     #turn to local directory           
     lcd /usr/local/auto_bak/           
              
     #transfer the file and add time lable           
     put /usr/local/auto_bak/dbname.sql dbname`date -d today +"20%y-%m-%d"~"%H:%M"`.sql           
     quit           
     end           
            
'添加权限            
[root@localhost auto_bak]#chmod +x auto_bak_db.sh            
           
二、使用crontab定时执行auto_bak_db.sh           
[root@localhost local]#crontab -u root -e           
  #每12小时备份一次，并记录到日志           
  0 */12 * * *  /usr/local/auto_bak/auto_bak_db.sh 1>/usr/local/auto_bak/auto_bak_db.log 2>&1               
           
说明：后面所加的" 1>/usr/local/auto_bak/auto_bak_db.log 2>&1  " 产生的日志可以作为问题查找的参考。