This is a shell script you run, with a list of servers

Example:

revoke-ssh-key.sh mycomputer.company.com server.nonprofit.org othercomputer.government.biz

This tool will:

• Assume you've already removed the key from web apps like Google Compute Engine and GitHub, and

• Assume you have a bad old key in ~/.ssh/id_rsa_old and ~/.ssh/id_rsa_old.pub, and

• Assume the old key is still in ssh-agent (you can add it if not), and

• Assume you use ssh-agent, and

• Assume you have generated a new key in ~/.ssh/id_rsa and ~/.ssh/id_rsa.pub.

• It will check if the machine in question has your new key, and
• If so, it will remove the old key, and
• If it doesn't have the new key, it'll add it.

export DRY_RUN=yes

GPLv2 or later, at your option.

(C) 2015 Asheesh Laroia