A simple backup script written by https://levels.io/backup-linode-digital-ocean-vps-amazon-s3/

backuptos3.sh

#!/bin/sh
echo 'Started'
date +'%a %b %e %H:%M:$S %Z %Y'
s3cmd sync --recursive --preserve /srv s3://nameofyours3bucket
s3cmd sync --recursive --preserve /etc s3://nameofyours3bucket
s3cmd sync --recursive --preserve /home s3://nameofyours3bucket
s3cmd sync --recursive --preserve /var s3://nameofyours3bucket
dpkg --get-selections > dpkg.list
s3cmd sync --recursive --preserve dpkg.list s3://nameofyours3bucket
date +'%a %b %e %H:%M:$S %Z %Y'
echo 'Finished'