How do I fix a failed git commit?

Question

I am new to git and was trying to commit, but I got stuck in what looked like vi which I\'m not familiar with. I managed to get out of it, but I think

Answer 1

Removing index.lock file manually from .git directory worked.

or

From command line:

$ rm -rf .git/index.lock

Note: Make sure that only one index file exist on .git directory