Linux计划任务通过执行脚本…

原文地址：Linux计划任务通过执行脚本备份XAMPP安装的MySQL数据库作者：邓强

1. 首先编辑计划任务

# vim /etc/crontab  加入以下代码：

# mysqldump mysqlbases to thisfile

0 2 * * * root/usr/bin/mysqlbak

这是设置每天2点定时执行mysqlbak文件，mysqlbak是一个脚本文件，下面会写到其中内容。

2.创建mysql数据库备份到的文件夹并给予此文件夹写入的权限

#mkdir /home/mysqldatabak

# chmod -R 777/home/mysqldatabak

3. 创建shell脚本文件mysqlbak

# vi /usr/bin/mysqlbak

并将以下内容编辑到此脚本文件中

#!/bin/sh

# mysql_backup.sh: backup mysql databasesand keep newest 5 days backup.

#

# your mysql logininformation

# db_user is mysql username

# db_passwd is mysqlpassword

# db_host is mysql host

#-----------------------------

db_user="root"

db_passwd="123456"

db_host="localhost"

# the directory for story your backupfile.

backup_dir="/home/mysqldatabak"

# date format for backup file(dd-mm-yyyy)

time="$(date +"%Y-%m-%d")"

# mysql, mysqldump and some other bin'spath

MYSQL="/opt/lampp/bin/mysql"

# "$(which mysql)"

MYSQLDUMP="/opt/lampp/bin/mysqldump"

#"$(which mysqldump)"

MKDIR="$(which mkdir)"

RM="$(which rm)"

MV="$(which mv)"

GZIP="$(which gzip)"

# check the directory for store backup iswriteable

test ! -w $backup_dir&& echo "Error: $backup_dir isun-writeable." && exit0

# the directory for story the newestbackup

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;

4.  

给/usr/bin/mysqlbak脚本可执行的权限

# chmod +x /usr/bin/mysqlbak

最后重启计划任务   service crondrestart

5. 这样在/home/mysqldatabak/ 每天的凌晨2时会自动运行此脚本，然后备份数据库到此目录。如下图所示则说明备份成功：

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本文修改自：http://www.wangjunfeng.com.cn/archives/243.html