create a ssh-key

• ssh-keygen -t rsa -C "root"

ssh-copy

• ssh-copy-id -f -i .ssh/ss.pub [email protected]

ssh-config

    Host ss 122.10.11.11
    HostName 122.10.11.11
    IdentityFile ~/.ssh/ss
    User root

ssh test

    ssh -T ss

connect

    ssh ss