Git Problem Face

<!-- git error: failed to push some refs to --> 

git pull --rebase origin master
git push origin master

<!-- ============================================= -->

<!-- git error: -->
Another git process seems to be running in this repository, e.g.
an editor opened by 'git commit'. Please make sure all processes
are terminated then try again. If it still fails, a git process
may have crashed in this repository earlier:
remove the file manually to continue.

<!-- solve: -->
Try deleting index.lock file in your .git directory.

rm -f .git/index.lock

<!--Merge conflicts resolving:-->
git push -f origin master.