How to use multiple SSH keys

multiple-ssh-keys.md

How to use multiple SSH keys

Note: Replace USER_NAME with your username.

Create SSH Key

In this scenario we assume that we use two different GIT repos:

1. Run ssh-keygen -t rsa -C "[email protected]"
2. Enter file name (and path), e.g. C:\Users\USER_NAME\.ssh\id_rsa_github
3. Type in a passphrase (use a secure, long passphrase)
4. Confirm passphrase
5. Re-do step 1 to 4 for id_rsa_azure

Export public key

If you have cygwin installed:

1. clip < C:\Users\USER_NAME\.ssh\id_rsa_github (for the GitHub RSA public key)
2. Paste it in the GitHub settings, do the same for the Azure environment

Otherwise:

1. Open C:\Users\USER_NAME\.ssh\id_rsa_github.pub with an editor
2. Select all content and copy/paste it in the GitHub settings, do the same for the Azure environment

Define which RSA key is used for which GIT repo

1. Open C:\Users\USER_NAME\.ssh\config with an editor
2. Add following lines:

Host github.com
 HostName github.com
 IdentityFile C:\Users\USER_NAME\.ssh\id_rsa_github
 
Host ssh.dev.azure.com
 HostName ssh.dev.azure.com
 IdentityFile C:\Users\USER_NAME\.ssh\id_rsa_azure

3. Done

See also

• https://superuser.com/a/232406/191287