I've searched a lot and all found solutions weren't work.
I generated ssh key via:
ssh-keygen -t rsa -b 4096 -C "myemail@gmail.com"
I got the key:
cat /home/drupality/.ssh/id_rsa.pub
I noticed that key hasn't an email address inside, but my username (drupality).
I put key to github SSH keys settings.
Most imported:
ssh-add /home/drupality/.ssh/id_rsa
Now I'm trying:
ssh git@github.com
an output:
The authenticity of host 'github.com (192.30.252.130)' can't be
established. RSA key fingerprint is
16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48. Are you sure you want
to continue connecting (yes/no)? Host key verification failed.
What I've done wrong?