Show HN: Invite friends to SSH into your laptop using their GitHub handle
Neat.I use the following incantation when authorizing folks to ssh into my servers via github public keys:    curl https://github.com/[github name].keys >> ~/.ssh/authorized_keys

[github name] here should be replaced with github username of your friend or colleague. Really handy because I can just authorize them without a human request/response loop and manual key moving. Simple and no external tools needed. Normal caveats about authorizing people apply.