[转载]Back up all of your mysql databases nightly

原文地址：http://www.linuxbrigade.com/back-up-all-of-your-mysql-databases-nightly/

Put the following into something like /usr/local/bin/mysql_backup.sh and since it has MySQL’s root password in it, make sure that you chmod 700 to it so no one else can read it.

#!/bin/bash

DB_BACKUP="/backups/mysql_backup/`date +%Y-%m-%d`"
DB_USER="root"
DB_PASSWD="secretttt"
HN=`hostname | awk -F. '{print $1}'`

# Create the backup directory
mkdir -p $DB_BACKUP

# Remove backups older than  days
find /backups/mysql_backup/ -maxdepth  -type d -mtime + -exec rm -rf {} \;

# Backup each database on the system
for db in $(mysql --user=$DB_USER --password=$DB_PASSWD -e 'show databases' -s --skip-column-names|grep -viE '(staging|performance_schema|information_schema)');
do mysqldump --user=$DB_USER --password=$DB_PASSWD --events --opt --single-transaction $db | gzip > "$DB_BACKUP/mysqldump-$HN-$db-$(date +%Y-%m-%d).gz";
done

By the way, we’re skipping tables ‘performance_schema’ and ‘information_schema’…
Then just call it from cron by creating a root cron entry:

  * * * /usr/local/bin/mysql_backup.sh

（完）