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ssh_config.md

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GITHUB SSH Keys

If you with to install your own github ssh keys for another account (for example on a work VDI), you can generate a different set of private keys for a different email and install that public key on github.

Generate new RSA key for different email account:

ssh-keygen -t rsa -C "<other-email>@<domain>"
Generating public/private rsa key pair.
Enter file in which to save the key (/home/<user>/.ssh/id_rsa): /home/<user>/.ssh/id_rsa.<other-email>
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/<user>/.ssh/id_rsa.<other-email>.
Your public key has been saved in /home/<user>/.ssh/id_rsa.<other-email>.pub.
The key fingerprint is:
xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx <other-email>@<domain>
...

⚠️ Don't overwrite your existing id_rsa file for your normal user account.

Update .ssh/config to add new host info. If the file doesn't exist, create it and set permissions using chmod 600 ~/.ssh/config.

NOTE: This may also cause other SSH/SCP issues with other hosts. So to work around this, add strict identify file usage for all hosts.

Host github.com
  Hostname github.com
  User <github-username>
  IdentityFile ~/.ssh/id_rsa.<other-email>

Host *
  IdentitiesOnly yes

Add your .ssh/id_rsa.<other-email>.pub public key to your github account in the Settings / SSH and GPG keys page.

Test your SSH connection to github.

ssh -T github.com

If you want to use these SSH credentials for an existing repository, you may need to update your <repository>/.git/config file to the following. If using this dotfiles repository, the git config will be at ${HOME}/.cfg/config. You will also need to make sure the username and email is correct for this repository:

[remote "origin"]
	url = [email protected]:<user-name>/<repository>
[user]
	name = <user-name>
	email = <other-email>@<domain>