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Edisson Ballesteros Aguilar
Edisson Ballesteros Aguilar

Posted on • Updated on

Setup Multiple SSH Key's

#ssh #beginners

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>"
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RSA 2048

ssh-keygen -t rsa -b 2048 -C "<comment>"
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2. Add SSH Key 

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

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

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

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

4. Setup public key 

cat private_key.pub
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ssh-ed25519 ABBBC3NzaC1lZDI1NTE5AAAAIBSFa3klpakF4ZkNPO7JWMsQDqy3Wd6ZvyPslt <comment>
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Copy the key to your repository preferences and create the SSH key

5. Verify the connection 

ssh -T git@gitlab-scope
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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!
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6. Clone the repository 

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

git clone ssh://aws-codecommit/v1/repos/repository-name
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