reprogrammer reprogrammer - 18 days ago 5
Git Question

Configuring Git over SSH to login once

I have cloned my git repository over ssh. So, each time I communicate with the origin master by pushing or pulling, I have to reenter my password. How can I configure git so that I do not need to enter my password multiple times?

Answer

Try ssh-add, you need ssh-agent to be running and holding your private key

(Ok, responding to the updated question, you first run ssh-keygen to generate a public and private key as Jefromi explained. You put the public key on the server. You should use a passphrase, if you don't you have the equivalent of a plain-text password in your private key. But if you do, then you need as a practical matter ssh-agent as explained below.)

You need to be running ssh-agent in the background when you log in, and then the first time you log in, run ssh-add to give the agent your passphrase. All ssh-family commands will then consult the agent and automatically be able to use your private key.

On OSX (err, macOS), GNOME and KDE systems, ssh-agent is usually launched automatically for you. I will go through the details in case, like me, you also have a Cygwin or other windows environment where this most certainly is not done for you.

Start here: man ssh-agent.

There are a multitude of ways to automatically run the agent. As the man page explains, you can either run it so that it is a parent of all the other processes and arrange for the environment variables it provides (for interprocess contact) to automatically be in all child environments, or you can run the agent as an ordinary child, save the environment settings in a file, and source that file in every shell when they start.

My OSX and Ubuntu systems automatically do the agent launch setup, so all I have to do is run ssh-add once. Try running ssh-add and see if it works, if so, then you just need to do that once per reboot.

My Cygwin system needed it done manually, so I did this in my .profile and I have .bashrc source .profile:

. .agent > /dev/null
ps -p $SSH_AGENT_PID | grep ssh-agent > /dev/null || {
        ssh-agent > .agent
        . .agent > /dev/null
}

The .agent file is created automatically by the script; it contains the environment variables definitions and exports. The above tries to source the .agent file, and then tries to ps(1) the agent. If it doesn't work it starts an agent and creates a new agent file. You can also just run ssh-add and if it fails start an agent.

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