SSH’ing into a server takes a few seconds. This doesn’t seem like much but when your logging into and out of servers all day removing those seconds makes life a little easier.
The following configuration will create a master connection where all the crypto negation and key exchange takes place. This master connection can then be reused for any subsequent connection meaning that the connections are near instant.
Put the following configuration into your SSH config file at
Host * ControlPath ~/.ssh/%C.sock ControlMaster auto ControlPersist 10m
The socket file will get written into your
.ssh directory and the socket will persist after logout for
10m. You can change that timeout period to anything you like with the
I measured connections to a remote server and got the following: