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Lukas Lukac
Lukas Lukac

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How to configure a local Git repository to use a specific SSH key

Sounds familiar?

git push origin master

fatal: Could not read from remote repository.
Please make sure you have the correct access rights
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When you work on multiple projects from the same machine, you often need to use a different SSH key per repository.

For example you may have two repositories:

  • github.com/work/work-repo-1 [work SSH key]
  • github.com/personal/personal-repo-1 [personal SSH key]

If you don't want to mess around with the global SSH config stored by default in ~/.ssh/config, you can configure the local one, located as a hidden folder inside your cloned repository path.

Open the local repository's git config file:

cd $HOME/your-projects/github.com/work/work-repo-1
vim .git/config
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You will see settings like:

[core]
        repositoryformatversion = 0
        filemode = true
        bare = false
        logallrefupdates = true
        ignorecase = true
        precomposeunicode = true

[remote "origin"]
        url = git@github.com:web3coach/web.git
        fetch = +refs/heads/*:refs/remotes/origin/*
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Individualize the settings

Β Configure your user

Configure your user's name, email by modifying the user group settings. This is important because this name and email will appear in your project's git commit history.

[user]
        name = Lukas Lukac
        email = lukas@web3.coach
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Β Configure your auth permissions

Git uses SSH for permissions authentication. Specify what SSH key you want to use by defining the sshCommand setting inside the core group:

[core]
        sshCommand = "ssh -i ~/.ssh/id_rsa_web3coach"
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All together:

[user]
        name = Lukas Lukac
        email = lukas@web3.coach

[core]
        repositoryformatversion = 0
        filemode = true
        bare = false
        logallrefupdates = true
        ignorecase = true
        precomposeunicode = true

        sshCommand = "ssh -i ~/.ssh/id_rsa_web3coach"

[remote "origin"]
        url = git@github.com:web3coach/web.git
        fetch = +refs/heads/*:refs/remotes/origin/*
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Alternative

Prefix your git command with an ENV variable on the fly:

GIT_SSH_COMMAND='ssh -i ~/.ssh/id_rsa_web3coach' git push origin master
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Thank you for reading.


If you like this tutorial, follow me on Twitter where I share my blockchain programming journey: https://twitter.com/Web3Coach

Top comments (5)

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chrisdrmw profile image
ChrisDrMW

super, thanks ! this helped me fixing a problem with push command

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richstoneio profile image
Rich Steinmetz

thanks man, very useful!

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sweethuman profile image
Gheorghe Avram

Perfect and very quick.

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arturoaguilar1 profile image
Arturo Aguilar Lopez

Thank you ! Very useful for me!

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Carlos Saltos

Thanks for sharing, you saved the day !! πŸ‘πŸ˜Ž

Regex for lazy developers

regex for lazy devs

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