unable to push changes to github using git

Question

I'm new to git and I have a github repository where I want to commit changes to a python file and push . However after accesing my repository from an ubuntu vm now that I am back to windows 10 when I want to push I get

error: failed to push some refs to 'https://github.com/BillSkentos/MovieFlix2020_E17136_SKENTOS_VASILIS.git'

hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.

I'm completely new to git and tried git checkout master and tried pushing but to same result. I would appreciate your help with this. Thank you in advance

Answer 1

In Git 1.7.0 and later, you can checkout a new branch

git checkout -b <branch>

Edit files, add and commit. Then push with the -u (short for --set-upstream) option:

git push -u origin <branch>

Git will set up the tracking information during the push. Now by using these commands, you will not get any error.