SSH: multiple keys for the same host

refs: https://gist.github.com/oanhnn/80a89405ab9023894df7, https://www.freecodecamp.org/news/the-ultimate-guide-to-ssh-setting-up-ssh-keys/, https://betterprogramming.pub/how-to-set-up-multiple-ssh-keys-ae6688f76570, https://stackoverflow.com/questions/2419566/best-way-to-use-multiple-ssh-private-keys-on-one-client

eg: one ssh key for work, another for personal

  1. generate both keys
    • ssh-keygen -t rsa (default path ~/.ssh)
    • ssh-keygen -t rsa (different path, eg ~/.ssh2)
  2. add alias host names in ~/.ssh/config 
    Host work
  HostName bitbucket.org
  IdentityFile ~/.ssh/id_rsa
  User git

Host personal
  HostName bitbucket.org
  IdentityFile ~/.ssh2/id_rsa
  User git
  3. add private keys to ssh-agent (default one is added automatically)
    • ssh-add ~/.ssh2/id_rsa
  4. use the alias while cloning
    • instead of: git clone git@bitbucket.org:username/my-work-project.git
    • use: git clone git@work:username/my-work-project.git
    • and: git clone git@personal:username/my-personal-project.git