git push: permission denied (public key)

I'm trying to push a file to a git repo of a friend but errors on public key.

git push origin testbranch
Permission denied (publickey).
fatal: Could not read from remote repository.

Where and how do we define public / private keys?

git remote -v returns:

origin  [email protected]:Sesamzaad/NET.git (fetch)
origin  [email protected]:Sesamzaad/NET.git (push)

Any help is appreciated.

I was facing same problem, here is what I did that worked for me.

Use ssh instead of http. Remove origin if its http.

git remote rm origin

Add ssh url

git remote add origin [email protected]:<username>/<repo>.git

Generate ssh key inside .ssh/ folder. It will ask for path and passphrase where you can just press enter and proceed.

cd ~/.ssh
ssh-keygen

Copy the key. You can view your key using. If you hadn't specified a different path then this is the default one.

cat ~/.ssh/id_rsa.pub

Add this key to your github account. Next do

ssh -T [email protected]

You will get a welcome message in your console.

cd into to your project folder. git push -u origin master now works!

I just had to deal with this issue. @user3445140's answer helped me, but was much more than I needed to do.

1. Get your public SSH key with cat ~/.ssh/id_rsa.pub
2. Copy the key, including the "ssh-rsa" but excluding your computer name at the end
3. Go to https://github.com/settings/ssh
4. Add your SSH key

This worked for me.

first of all, remove current remote :

git remote rm origin

second, add remote through HTTPS but git@xxx :

git remote add origin https://github.com/Sesamzaad/NET.git

then push has worked for me :

git push origin master

I fixed it by re-adding the key to my ssh-agent.

with the following command:

ssh-add ~/.ssh/path_to_private_key_you_generated

For some reasons it was gone.