I have done the changes in my local repository and when i was pushing the changes to github it showed me this, what do I do?
Updates were rejected because the remote contains work that you do hint i got from ubuntu: not have locally. This is usually caused by another repository pushing to the same ref. You may want to first integrate the remote changes(e.g., 'git pull ...') before pushing again. See the 'Note about fast-forwards' in 'git push --help' for details.
PS: I'm new on git.