Remember git passphrase in WSL

I tried both methods in previous answers (as well as others found elsewhere) on WSL 2 and they either did not work or had caveats I couldn't live with. This is what worked for me.

Install keychain:

sudo apt install keychain

Then add the following line to your shell's configuration file (likely ~/.bashrc or ~/.zshrc):

eval `keychain --quiet --eval --agents ssh id_rsa`

Now you will only have to enter your password when booting WSL!

Thank you Birk Holland for this article.

I tried the option to add AddKeysToAgent yes to ~/.ssh/config but it doesn't keep it between new tabs on the terminal.

The best solution I found so far is to do the following:

sudo apt install keychain

Find your hostname using the terminal:

hostname

Then add the following to your ~/.bashrc or ~/.zshrc file:

/usr/bin/keychain --nogui ~/.ssh/id_rsa
source $HOME/.keychain/YOUR-HOSTNAME-HERE-sh

Now, each time you reboot, you’ll have to enter your passphrase. But you only have to do it one time until you reboot or terminate WSL.

If you want to use the same key you already have on Windows you can follow this post Sharing SSH keys between Windows and WSL 2

I found the answer!

First, make sure you have ssh-agent running all the time by adding eval $(ssh-agent) to your .bash_profile.

Then add AddKeysToAgent yes to your ssh config:

touch ~/.ssh/config
chmod 600 ~/.ssh/config
echo "AddKeysToAgent yes" >> ~/.ssh/config

You'll get prompted when you first do some ssh, but the passphrase will be automatically added to the ssh-agent so you won't have to type it again until you end your session and start a new one.