Shell script to use duplicity and AWS S3 to backup files on a server, hooray. Not the most secure way to handle your password and AWS key, but couldn't get easier, giving you no reason to have some kind of backup of your server.

backup.sh

#!/bin/bash

export PASSPHRASE=your_gpg_passphrase
export AWS_ACCESS_KEY_ID=your_s3_access_key
export AWS_SECRET_ACCESS_KEY=your_s3_secret

export MYSQL_PASSWORD=your_mysql_password

for DB in app_1 app_2 app_3; do
  mysqldump -h localhost -u backup_user -p${MYSQL_PASSWORD} ${DB} | gzip > /var/dbdumps/${DB}.sql
done

duplicity --include /var/www --include --include /var/dbdumps --exclude "**"  --full-if-older-than 30D / s3+http://com.mycorp.myhost.backup