mysql_backup_script.sh

#!/bin/bash

# MySQL Server Info
MyUSER="root"
MyPASS="passwd"
MyHOST="localhost"

# Linux bin paths, change this if it can not be autodetected via which command
MYSQL="$(which mysql)"
MYSQLDUMP="$(which mysqldump)"
CHOWN="$(which chown)"
CHMOD="$(which chmod)"
GZIP="$(which gzip)"

# Backup Dest directory, change this if you have someother location
DEST="/var/www/backup"

# Main directory where backup will be stored
MBD="$DEST/mysql"

# Get data in yyyy-mm-dd format
NOW="$(date +"%Y-%m-%d")"

# File to store current backup file
FILE=""
# Store list of databases 
DBS=""

# DO NOT BACKUP these databases
IGGY="information_schema mysql performance_schema"

[ ! -d $MBD ] && mkdir -p $MBD || :

# Only root can access it!
$CHOWN 0.0 -R $DEST
$CHMOD 0600 $DEST

# Get all database list first
DBS="$($MYSQL -u $MyUSER -h $MyHOST -p$MyPASS -Bse 'show databases')"

for db in $DBS
do
  skipdb=-1
	if [ "$IGGY" != "" ]; then
		for i in $IGGY
		do
			[ "$db" == "$i" ] && skipdb=1 || :
		done
	fi

	if [ "$skipdb" == "-1" ] ; then
		FILE="$MBD/$db.$NOW.sql.gz"
		$MYSQLDUMP -u $MyUSER -h $MyHOST -p$MyPASS --opt $db | $GZIP -9 > $FILE
	fi
done