Speed Up Multiple SSH Connections to the Same Server

If you run a lot of terminal tabs or scripts that all need to make OpenSSH connections to the same server, you can speed them all up with multiplexing: making the first one act as the master and letting the others share its TCP connection to the server. If you don’t already have a config file in the .ssh directory in your home directory, create it with permissions 600: readable and writeable only by you.

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