Bypass passphrase when cloning git repositories

by Jii
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note
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diary

When you clone a repository using a SSH key, it prompts you to enter the passphrase. If you’re cloning a single repository, this may not be an issue. However, if you’re trying to clone multiple repositories, this becomes a troublesome. We can bypass this via configuring SSH auth.

First create a config file in ~/.ssh directory.

mkdir ~/.ssh
touch ~/.ssh/config
vim ~/.ssh/config

Use the SSH currently used in GitHub and register in like the following:

Host github.com
HostName github.com
IdentitiesOnly yes
UseKeychain yes
IdentityFile ~/.ssh/id_ed25519

In the case of macOS, add the SSH key to the system keychain as well.

ssh-add --apple-use-keychain ~/.ssh/id_ed25519

Add GitHub’s server host key to the known_hosts.

ssh-keyscan github.com >> ~/.ssh/known_hosts

Confirm SSH key auth is working properly.

ssh -T git@github.com

Setting is complete if you see a message like the below:

Hi tadanoyu! You've successfully authenticated, 
but GitHub does not provide shell access.

Once the setup is complete, it won’t ask for the passphrase when you clone a repository using SSH key.