How to specify the private SSH-key to use when executing shell command on Git?

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None of these solutions worked for me.

Instead, I elaborate on @Martin v. Löwis ‘s mention of setting a config file for SSH.

SSH will look for the user’s ~/.ssh/config file. I have mine setup as:

Host gitserv
    Hostname remote.server.com
    IdentityFile ~/.ssh/id_rsa.github
    IdentitiesOnly yes # see NOTES below

And I add a remote git repository:

git remote add origin git@gitserv:myrepo.git

And then git commands work normally for me.

git push -v origin master

NOTES

  • The IdentitiesOnly yes is required to prevent the SSH default behavior of sending the identity file matching the default filename for each protocol. If you have a file named ~/.ssh/id_rsa that will get tried BEFORE your ~/.ssh/id_rsa.github without this option.

References

  • Best way to use multiple SSH private keys on one client
  • How could I stop ssh offering a wrong key

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