~/.ssh/config

ssh_config

Host gitlab
    HostName gitlab.com
    User git
    PubkeyAcceptedKeyTypes +ssh-rsa
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/gitlab-key/id_rsa
    
Host github
    HostName github.com
    User git
    Port 22
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/github-key/id_rsa

Host gist
    HostName gist.github.com
    User git
    Port 22
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa

Host my-dev
    HostName 192.168.0.214
    User lesstif
    Port 9022
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/dev/id_rsa
    
## Host 를 * 로 지정하면 위에서 설정한 Host를 제외하고 모든 Host 에 적용됨
Host *
    User lesstif
    PreferredAuthentications publickey, password
    IdentityFile ~/.ssh/id_rsa