Cannot push to Heroku because key fingerprint

Solution 1:

I had the same problem, I followed this post and others of the same kind without success :-((

Finally, I found the solution: I had to add my new rsa identity in my machine!

So, first of all I created a new rsa key:

ssh-keygen -t rsa -C "giordano.scalzo[at]gmail.com" -f  ~/.ssh/id_rsa_heroku

then added it to my machine

ssh-add ~/.ssh/id_rsa_heroku

and, finally, to Heroku

heroku keys:add ~/.ssh/id_rsa_heroku.pub

After that,

git push heroku master

worked like a charm!

Hope this helps.

Solution 2:

I, too have multiple keys and multiple heroku accounts, so I come across this problem every few months. As mentioned Giordano Scalzo, Tom Carchrae, and user664833, the main problem is ssh-agent, which you control using the ssh-add command. The man page (man ssh-add) is actually pretty clear and concise, so check it out.

You can list all the keys that ssh-agent knows about with:

ssh-add -l

You can delete all the keys that ssh-agent knows about with:

ssh-add -D

Or delete a specific key with

ssh-add -d ~/.ssh/id_rsa_example_key_file_use_your_own

Don't worry! You aren't actually deleting the keys, only changing which ones ssh-agent automatically tries to use, for example, when you try to push to heroku. It's easy to add and delete keys as needed, so for me, when I get frustrated by this problem, the easiest way to fix it is to delete all the keys and add back in only the one I want to use at the moment.

ssh-add -D
ssh-add ~/.ssh/id_rsa_example_use_this_one_i_mean_it