Git: Public key authentication failed

Question

When I want to use git on with azure devops (vsts) I can't use git clone, pull, push etc. I get the error:

remote: remote: Your Git command did not succeed. remote: Details: remote: Public key authentication failed. remote: fatal: Could not read from remote repository.

But when I use the command below it works, so the problem is not the key. ssh-agent sh -c 'ssh-add ~/.ssh/key; git push repo'

When I do a git clone, push, pull etc I thought it goes through your .ssh dir to automatically check which key to use. Anybody any idea on how to fix this?

I'm seeing a similar thread at developercommunity which indicates this bug is fixed — Jayendran
– Jayendran, Commented Oct 8, 2018 at 7:52
check this question: stackoverflow.com/questions/42705553/… — Shayki Abramczyk
– Shayki Abramczyk, Commented Oct 8, 2018 at 8:17
look at the official doc I have multiple SSH keys. How do I use different SSH keys for different SSH servers or repos? — vladimir
– vladimir, Commented May 6, 2020 at 9:34

bramvdk · Accepted Answer · 2018-10-08 11:25:20Z

27

Fixed it by creating ~/.ssh/config and added:

Host xxx.visualstudio.com
  IdentityFile ~/.ssh/key

Make sure to do chmod 0400 ~/.ssh/config

answered Oct 8, 2018 at 11:25

bramvdk

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vladimir Over a year ago

look at the official doc I have multiple SSH keys. How do I use different SSH keys for different SSH servers or repos?

Lolorol · Accepted Answer · 2019-06-03 01:31:11Z

15

I added in the ~/.ssh/config:

Host ssh.dev.azure.com
  IdentityFile ~/.ssh/[you private key file]

answered Jun 3, 2019 at 1:31

Lolorol

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Guildenstern70 · Accepted Answer · 2021-09-30 12:53:35Z

6

I solved the problem by adding the identity to the SSH provider with

ssh-add [path to your private key]

so, for instance:

ssh-add /home/myuser/.ssh/id_rsa

answered Sep 30, 2021 at 12:53

Guildenstern70

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NoobInside Over a year ago

The only thing that worked for me. Definitely need more up votes !

yozniak · Accepted Answer · 2022-07-27 02:41:38Z

5

My case was more tricky. VisualStudio.com banned my old ssh key and didn't bother to somehow notify me. Experimentally I figured out that I just need to add a new key and use it instead.

ssh-keygen -f ~/.ssh/new_key

In ~/.ssh/config:

Host vs-ssh.visualstudio.com
  IdentityFile ~/.ssh/new_key

That worked. Then fun thing was that they don't let you remove the old banned key from SSH Keys page.

Update: With OpenSSH 8.9p1 that makes ssh-rsa keys by default, you may need to enable ssh-rsa in ssh_config or ~/.ssh/config.

    PubkeyAcceptedAlgorithms +ssh-rsa
    HostkeyAlgorithms +ssh-rsa

See https://stackoverflow.com/a/72102410/4653540

edited Jul 27, 2022 at 2:41

answered Aug 21, 2019 at 21:55

yozniak

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ivan · Accepted Answer · 2020-12-14 22:53:29Z

1

Along a similar line as Yuriy Pozniak's solution, I simply removed and re-added my public key, and that resolved my issue.

Modifying the ~/.ssh/config file to explicitly point the azure devops host to my private key did not work for me.

answered Dec 14, 2020 at 22:53

ivan

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Kiran Over a year ago

Thanks! Adding a new public key worked for me. This is really crazy. Last night I am able to connect from Debian machine and I wake up in the Morning and suddenly I can't push changes to the repository. If it's Micro$oft, it has to be crazy.

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