For me things never work as they should. Github is not an exception. After my first try to submit things to repo i run into: ... Author identity unknown. *** Please tell me who you are. PROBLEM CAN BE SOLVED BY THESE COMMANDS: git config --global user.email "YOUR_EMAIL" git config --global user.name "YOUR_LOGIN" After that certificate issue occurred: ... self-signed certificate in certificate chain and another error right after the previous one: