Install openssh and ssh-copy-id

brew install

Create SSH Key

cd ~/.ssh/
ssh-keygen -t rsa

Copy to your server

ssh-copy-id [-p port] username@hostname
then enter your server' password

Configure

vim ~/.ssh/config

Host alias-name
HostName hostname
Port post
User username
IdentitiesOnly yes

Set alias command

vim .zshrc

alias sshl='cat ~/.ssh/config | grep "Host "'

Finish

You can list the ssh servers by `sshl`
then connect your server by `ssh alias-name`

Enjoy yourself!