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I tried to clone one of my repositories on github from my newly installed linux machine running manjaro with fluxbox. i set up the user.name and user.email and uploaded the correct ssh key. but i always get

The authenticity of host 'github.com (192.30.252.129)' can't be established. RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8. Are you sure you want to continue connecting (yes/no)? Host key verification failed. fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.

I googled it and found that i should do ssh-keygen -R github.com which should delete github from my known_hosts file but the known_hosts file doesn't even exist yet, because i just finished setting up a new linux install.

so i tried ssh -vT git@github which gave me

ssh -vT [email protected] OpenSSH_7.1p1, OpenSSL 1.0.2d 9 Jul 2015 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Connecting to github.com [192.30.252.128] port 22. debug1: Connection established. debug1: identity file /home/masterkraft0r/.ssh/id_rsa type 1 debug1: key_load_public: No such file or directory debug1: identity file /home/masterkraft0r/.ssh/id_rsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/masterkraft0r/.ssh/id_dsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/masterkraft0r/.ssh/id_dsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/masterkraft0r/.ssh/id_ecdsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/masterkraft0r/.ssh/id_ecdsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/masterkraft0r/.ssh/id_ed25519 type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/masterkraft0r/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.1 debug1: Remote protocol version 2.0, remote software version libssh-0.7.0 debug1: no match: libssh-0.7.0 debug1: Authenticating to github.com:22 as 'git' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client [email protected] <implicit> none debug1: kex: client->server [email protected] <implicit> none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ssh-rsa SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8 The authenticity of host 'github.com (192.30.252.128)' can't be established. RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8. Are you sure you want to continue connecting (yes/no)? Host key verification failed.

which is way over my head. can somebody tell me what went wrong and maybe how to fix this mess?

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  • Is your home directory on this server owned by your user, or by root? What exactly was the name of the "correct" key file you copied to your user account, and precisely where did you put it? Can you please add the output of ls -la ~masterkraft0r/.ssh/ to your question? Also, FYI, kräftor is crayfish in Swedish. :) Commented Sep 3, 2015 at 23:52
  • If you typed yes in response to the prompt, the ssh client would update your known_hosts file itself. Commented Aug 26, 2017 at 18:11

5 Answers 5

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52

Did you try to add github as known host?

If you have an existing known_hosts file and do not want to overwrite (as @Puce suggested in the comment), use this.

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

This will add the rsa key to the end of the known_hosts.

If you have no idea what known_hosts is/means, or you never engaged with it for sure, you can simply write a new one, but note that this will remove the existing one if you had any.

ssh-keyscan -t rsa github.com > ~/.ssh/known_hosts
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5 Comments

Also carefully follow the instruction again. Most of time people forget to do a step or two.
Np. I'd be appreciated if you check this one as answer if it helped. Thanks.
This removes all existing entries, if the known_hosts file already exists!
I think you'd be better off putting the edited version first considering the first version is destructive.
@toxaq will do. Thanks for the suggestion :)
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Step 1: Generate KEY

- cd ~/.ssh - ssh-keygen -t rsa -b 4096 -C "[email protected]"

NOTE - Keys need to be only readable by you:

chmod 400 ~/.ssh/id_rsa

If Keys need to be read-writable by you:

chmod 600 ~/.ssh/id_rsa

Step 2: Check the Contents and copy

cat ~/.ssh/nameOfFile.pub | pbcopy

Step 3: Configure your SSH key into Bitbucket (similar applies to Github)

GOTO settings => SSHKEY

- Add what you copied in Step 2 and give it a name

Step 4: Clone your repository using SSH protocol

git clone [email protected]:{username}/repo.git git clone [email protected]:{username}/repo.git

This should work BUT

If you keep getting this error

[ Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights ]

Follow this steps.

i. ssh -T [email protected] OR ssh -T [email protected] depending on which you are using { This will test your connection to Bitbucket OR Github). ii. If you do not see a message similar  to (logged in as username.). Go to the next step iii. ssh-add ~/.ssh/identity (identity is whatever name you saved the file when generating a key) iv. You will get this message (Identity added: /path to ssh file/.ssh/mywork ([email protected]) v. You can now clone your repository.
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0

If you just want to clone the repository, but you also use bitbucket or any other git tools, try to use https instead of ssh.

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This problem also happens to me when set the origin with newly generated ssh key due to re-installation of windows.

When I Update the ssh key path (new generated) it solved my problem using the following code

 eval $(ssh-agent -s) ssh-add /d/key **(path of new key d:/key)**
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-4

I'm no expert on git, but looking at this it seems like something was wrong with the connection between the server and your PC. It says:

 Host key verification failed. fatal: Could not read from remote repository.

That sounds like something went wrong when you received the data. Have you tried it multiple times and gotten the same response?

Try checking your internet connection, or if github was temporarily offline.

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