Host github.com
    User git
    HostName github.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/github

Host gitlab.com
    User git
    HostName gitlab.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/gitlab

Host server
    User ubuntu
    HostName 152.70.52.247
    IdentityFile ~/.ssh/server

Host local-server
    User guus
    HostName 81.206.144.139
    IdentityFile ~/.ssh/local-server

Host mail-server
    User ubuntu
    HostName 158.101.217.202
    IdentityFile ~/.ssh/mail-server