MySQL定时备份之使用Linux下的crontab定时备份实例

##################################################################  
# 备份某个数据库  
##################################################################  

# root 用户,创建备份目录  
mkdir -p /usr/local/cncounter/mysql_dump  
cd /usr/local/cncounter/mysql_dump  

# 导出数据库,热备  
mysqldump -u root -pmypasssecret cncounter > cncounter_dump.sql.20140414_1333 

##################################################################  
# 还原某个数据库  
##################################################################  
# 修改密码  
# mysqladmin -u root password "mypasssecret"  
# mysqladmin -u root password oldpass "mypasssecret"  

# 登录  
mysql -u root -pmypasssecret  

-- 热备只是备份数据库内部的表,以及数据  
use cncounter;  
source /usr/local/cncounter/mysql_dump/cncounter_dump.sql.20140414_1333;  
exit; 

##################################################################
# crontab 定时备份
##################################################################
# 
# root 用户,创建执行脚本
mkdir -p /root/mysql_dump/data
cd /root/mysql_dump
touch mysql_back.sh
chmod 755 mysql_back.sh

# 编辑备份脚本
vim mysql_back.sh

################下面是备份脚本的内容
#!/bin/sh
# File: /root/mysql_dump/mysql_back.sh
# Database info
DB_NAME="cncounter"
DB_USER="root"
DB_PASS="mypasssecret"
# Others vars
# whereis mysqldump
# IS ` but not '
BIN_DIR="/usr/bin"
BCK_DIR="/root/mysql_dump/data"
DATE=`date +%Y%m%d_%H%M%S`
# TODO
mkdir -p $BCK_DIR
$BIN_DIR/mysqldump --opt -u$DB_USER -p$DB_PASS $DB_NAME \
 > $BCK_DIR/$DB_NAME.dump_$DATE.sql

/usr/bin/mysqldump --opt -uroot -pmypasssecret cncounter \
> /root/mysql_dump/data/cncounter.dump_`date +%Y%m%d_%H%M%S`.sql

/usr/bin/mysqldump --opt -uroot -pmypasssecret cncounter | gzip \
> /root/mysql_dump/data/cncounter.dump_`date +%Y%m%d_%H%M%S`.sql.gz

# 添加到crontab
crontab -e

# 添加一行,root用户不需要指定执行的用户名,ESC,wq
1 1 * * * /root/mysql_dump/mysql_back.sh

# 不一定需要重启crontab服务
# service crond restart

# cat /etc/crontab 
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/

# For details see man 4 crontabs

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name command to be executed