SSH: Use Dedicated SSH Key for a Git Host
Normally, when using ssh for git (github, gitlab) you just need to upload a public key so that your terminal can authenticate. And normally that will be something like
~/.ssh/id_ed25519.pub because that’s your default key.
But what if you want to use a dedicated ssh key for some host, say corporate gitlab or github? That is possible.
Create a New Key
ssh-keygen.exe -t ed25519 -C "email for new key"
and when prompted to save the key, put it under different name, say
That will create
work_gitlab.pub which is what you can use with a trivial configuration.
If you don’t have
~/.ssh/config file, then create it, and add a section:
Host work-git HostName hostname.of.work-git User git IdentityFile ~/.ssh/work_gitlab IdentitiesOnly yes
Host specifies an alias for the host (read later),
HostName is actual DNS name of the host.
Clone Using New Key
Normally when you clone something, the url will look like
git clone ssh://email@example.com:2222/org/repo.git
but to use the new key just use the alias you’ve just created:
git clone ssh://git@work-git:2222/org/repo.git.
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