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linux下mysql自动备份脚本代码

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脚本放在 /home/user/mysql_backup.sh  crontab  # crontab -l  # m h dom mon dow command  28 16 * * * /home/user/mysql_backup.sh  脚本如下  。

复制代码代码如下

#!/bin/sh  # mysql_backup.sh: backup mysql databases and keep newest 5 days backup.  #  # Last updated: 20 March 2006  # ----------------------------------------------------------------------  # This is a free shell script under GNU GPL version 2.0 or above  # Copyright (C) 2006 Sam Tang  # Feedback/comment/suggestions : http://www.real-blog.com/  # ----------------------------------------------------------------------  # your mysql login information  # db_user is mysql username  # db_passwd is mysql password  # db_host is mysql host  # -----------------------------  db_user="root"  db_passwd="password"  db_host="localhost"  # the directory for story your backup file.  backup_dir="/home/mybackup"  # date format for backup file (dd-mm-yyyy)  time="$(date +"%d-%m-%Y")"  # mysql, mysqldump and some other bin's path  MYSQL="/usr/local/mysql/bin/mysql"  MYSQLDUMP="/usr/local/mysql/bin/mysqldump"  MKDIR="/bin/mkdir"  RM="/bin/rm"  MV="/bin/mv"  GZIP="/bin/gzip"  # check the directory for store backup is writeable  test ! -w $backup_dir && echo "Error: $backup_dir is un-writeable." && exit 0  # the directory for story the newest backup  test ! -d "$backup_dir/backup.0/" && $MKDIR "$backup_dir/backup.0/"  # get all databases  all_db="$($MYSQL -u $db_user -h $db_host -p$db_passwd -Bse 'show databases')"  for db in $all_db  do  $MYSQLDUMP -u $db_user -h $db_host -p$db_passwd $db | $GZIP -9 > "$backup_dir/backup.0/$time.$db.gz"  done  # delete the oldest backup  test -d "$backup_dir/backup.5/" && $RM -rf "$backup_dir/backup.5"  # rotate backup directory  for int in 4 3 2 1 0  do  if(test -d "$backup_dir"/backup."$int")  then  next_int=`expr $int + 1`  $MV "$backup_dir"/backup."$int" "$backup_dir"/backup."$next_int"  fi  done  exit 0;  。

备注:  mysql是以mysql用户身份运行的,对/home /mybackup不可写也会失败  chmod 777 /home/mybackup问题解决了 。

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