Dial starts a client connection to the given SSH server.

DialWithJumpHost access host buy through jumper.

DialWithKey starts a client connection to the given SSH server with key authmethod.

DialWithKeyWithPassphrase same as DialWithKey but with a passphrase to decrypt the private key.

DialWithPasswd starts a client connection to the given SSH server with passwd authmethod.

DialWithSSHAgent same as DialWithKey but retrieval private key through ssh-agent.