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Simple MySQL database backup

I made this script after I decided it was easier for me to do it myself than find one online. It takes a backup as often as you'd like (I set a cron for doing it hourly). The backups are saved until their modification time is 7 days old. Note, I said modification time not creation time.

This is because there's no way to figure that out in linux (at least not my version). The only line you should have to change is:

FILE_LOCATION=/root/backups/$SERVER/db/;

Make sure after you edit the location, you create the actual directory they're going to be saved into:

mkdir -p /root/backups/test.server.com/db

backup_db.sh

#!/bin/bash
if [ ! $1 ] ; then
    echo 'Missing server.';
    echo 'Syntax: ./backup_db.sh <server> <username> <password>';
    exit 1;
fi
if [ ! $2 ] ; then
    echo 'Missing username.';
    echo 'Syntax: ./backup_db.sh <server> <username> <password>';
    exit 1;
fi
if [ ! $3 ] ; then
    echo 'Missing password.';
    echo 'Syntax: ./backup_db.sh <server> <username> <password>';
    exit 1;
fi
SERVER=$1;
USERNAME=$2;
PASSWORD=$3;
DATE=`date '+%Y-%m-%d-%H:%M:%S'`
FILE_LOCATION=/root/backups/$SERVER/db/;
mkdir -p $FILE_LOCATION;
/usr/bin/mysqldump -h $SERVER -u $USERNAME -p$PASSWORD --opt --all-databases --quote-names | bzip2 -c > $FILE_LOCATION$SERVER-$DATE.sql.bz2;
# delete old backups
find $FILE_LOCATION -type f -mtime 7 | xargs rm -f

Here's an example cron:

40 * * * * /root/scripts/backup/backup_db.sh db-server.example.com backup mypassword

Here's the line you can edit for changing the amount of days until deletion:

find $FILE_LOCATION -type f -mtime 7 | xargs rm -f