How To GitHub delete a commit

1)
Clone the repo to your machine.
#git clone https://github.com/sajuptpm/tools.git

2)
Find ID of the commit which comes just before the commit which you want to delete.
You can use the command "#git log -n 10" for that.

3)
Then use this command:
#git rebase -i commit_id

Your text editor will open with a file that lists all the commits which come after your selected commit_id, and in front of each commit there is the word "pick".

In that list remove the commit which you want to delete and save it.

 4)
Force-push to remote repo.

#git push -f origin master

5)
Check github. It should be updated