git – Best way to use multiple ssh private keys on one client – Stack Overflow http://stackoverflow.com/questions/2419566/best-way-to-use-multiple-ssh-private-keys-on-one-client
rebuild vs restore | DigitalOcean https://www.digitalocean.com/community/questions/rebuild-vs-restore
Frequently Asked Questions – Technical | DigitalOcean https://www.digitalocean.com/help/technical/setup/