A simple shell script to backup all MySQL Server Database.

#!/bin/bash

# A simple shell script to backup all MySQL Server Database
#   http://bash.cyberciti.biz/backup/dump-all-mysql-databases/
#
# Dump all MySQL database every hour from raid10 db disk to /nas/mysql
#
# Each dump will be line as follows:
#   - Directory:  /nas/mysql/mm-dd-yyyy
#   - File: mysql-DBNAME.04-25-2008-14:23:40.gz
#   - Full path: /nas/mysql/mm-dd-yyyy/mysql-DBNAME.04-25-2008-14:23:40.gz
#
# Install cron job as follows to run script every hour:
#  $ @hourly /root/scripts/db1hr.backup.sh >/dev/null 2>&1
#
# -------------------------------------------------------------------------
# Copyright (c) 2005 nixCraft project <http://cyberciti.biz/fb/>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
#
#
# -------------------------------------------------------------------------
# Last updated: Jul-16-2009 - Fixed a small bug
#         - Make sure NAS really mounted on $NAS
# -------------------------------------------------------------------------
NOW=$(date +"%m-%d-%Y") # mm-dd-yyyy format
FILE=""     # used in a loop
NASBASE="/nas"    # NAS Mount Point
BAK="${NAS}/mysql/${NOW}" # Path to backup dir on $NAS

### Server Setup ###
#* MySQL login user name *#
MUSER="root"

#* MySQL login PASSWORD name *#
MPASS="YOUR-PASSWORD"

#* MySQL login HOST name *#
MHOST="127.0.0.1"

#* MySQL binaries *#
MYSQL="$(which mysql)"
MYSQLDUMP="$(which mysqldump)"
GZIP="$(which gzip)"

# Make sure nas is really mounted
mount | awk '{ print $3}' |grep -w $NASBASE >/dev/null
if [ $? -ne 0 ]
then
  echo "Error: NAS not mounted at $NASBASE, please mount NAS server to local directory and try again."
  exit 99
fi

### NAS MUST BE MOUNTED in Advance ###
# assuming that /nas is mounted via /etc/fstab
if [ ! -d $BAK ]; then
  mkdir -p $BAK
else
 :
fi

# get all database listing
DBS="$($MYSQL -u $MUSER -h $MHOST -p$MPASS -Bse 'show databases')"

# start to dump database one by one
for db in $DBS
do
 FILE=$BAK/mysql-$db.$NOW-$(date +"%T").gz
 # gzip compression for each backup file
 $MYSQLDUMP -u $MUSER -h $MHOST -p$MPASS $db | $GZIP -9 > $FILE
done