Multiple SSH keys for different github accounts

multiple_ssh_config.md

Multiple SSH Keys config for different github accounts

SSH keys

Suppose we have 3 SSH keys

• ~/.ssh/id_rsa
• ~/.ssh/id_rsa_sky
• ~/.ssh/id_rsa_heart

Your SSH config would look like this:

$ cat ~/.ssh/config

Host github.com
	HostName github.com
	User git
	IdentityFile ~/.ssh/id_rsa
        IdentitiesOnly yes

Host github.com-sky
	HostName github.com
	User git
	IdentityFile ~/.ssh/id_rsa_sky
        IdentitiesOnly yes
  
Host github.com-heart
	HostName github.com
	User git
	IdentityFile ~/.ssh/id_rsa_heart
        IdentitiesOnly yes

By default, git would use the first SSH key that is configured with Host github.com For those repositories that you want to use different SSH key, you need to change their git config:

$ cd /path/to/that/repository
$ cat .git/config
...
[remote "origin"]
	url = git@github.com-sky:[REPO-ORGANIZATION]/[REPO-NAME].git
	fetch = +refs/heads/*:refs/remotes/origin/*
...

With this update, git will attempt to use ~/.ssh/id_rsa_sky to connect to github

The same goes with another github account/SSH key.