Configure Server with SSH for GitLab

Docs of SSH GitLab

In your server, generate new SSH key with name id_gitlab wihtout password

ssh-keygen -t rsa -b 4096 -C "[email protected]" -f ~/.ssh/id_gitlab

now add the public key (id_gitlab.pub) to GitLab

add in ~/.ssh/config

Host gitlab.com
    Hostname gitlab.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_gitlab

add the identity

eval $(ssh-agent -s)
ssh-add ~/.ssh/id_gitlab

now test connection with

ssh -T [email protected]