How to set up authentication for two separate GitHub accounts from same ssh client?

Question

The short version:

Is there any way to set up automatic public-key-based ssh authentication from one Linux account to two different Github accounts?

Answer 1

You need to create two sets of (public/private) keys, one for each account.

You can reference them through an ssh config file, as detailed in "GitHub: Multiple account setup"/

#Account one
Host github.com
    HostName github.com
    PreferredAuthentications publickey
    IdentityFile /c/Users/yourname/.ssh/id_rsa
    User git

#Account two
Host ac2.github.com
    HostName github.com
    PreferredAuthentications publickey
    IdentityFile /c/Users/yourname/.ssh/id_rsa_ac2
    User git