Setup Multiple SSH Key's

Edisson Ballesteros Aguilar — Wed, 15 Jun 2022 02:22:51 +0000

Sometimes you will need to deal with multiple projects at the same time, some client with AWS, Gitlab, Github etc.
Here are some steps that could be helpful ;)

1. Create a new SSH Key

ED25519

ssh-keygen -t ed25519 -C "<comment>"

2. Add SSH Key

eval $(ssh-agent -s)
ssh-add <directory to private SSH key>

3. Setup config

Touch or update the config file in ~/.ssh/:

Host gitlab-scope
  HostName gitlab.com
  PreferredAuthentications publickey
  IdentityFile ~/.ssh/gitlab_com_rsa

AWS Codecommit

Host aws-codecommit
  HostName git-codecommit.{region}.amazonaws.com
  User APKARF3PHVLQ1EXAMPLE
  PreferredAuthentications publickey
  IdentityFile ~/.ssh/private_key
  PubkeyAcceptedAlgorithms +ssh-rsa
  HostkeyAlgorithms +ssh-rsa

Hostnames

Gitlab: gitlab.com
Github: github.com
AWS Codecommit: git-codecommit.{region}.amazonaws.com

4. Setup public key

cat private_key.pub

ssh-ed25519 ABBBC3NzaC1lZDI1NTE5AAAAIBSFa3klpakF4ZkNPO7JWMsQDqy3Wd6ZvyPslt <comment>

Copy the key to your repository preferences and create the SSH key

5. Verify the connection

ssh -T git@gitlab-scope

The authenticity of host 'gitlab.com (172.0.0.1)' can't be established.
ECDSA key fingerprint is SHA256:hfksfbdfoerHKSDKFDFDFDF.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'gitlab.com,172.0.0.1' (ECDSA) to the list of known hosts.
Welcome to GitLab, @user!

6. Clone the repository

git clone git@gitlab-scope:project/repository-name.git