Simply type:
git remote -v
and double-check the url associated with origin for your upstream repo.
Once you have the right url, update your remote origin with another git remote command:
git remote set-url origin /the/right/url
In your case, the url is wrong:
https:/github.com/nkshastri/datasciencecoursera.git # instead of: https://github.com/nkshastri/datasciencecoursera.git ^^^^
Simply type:
git remote set-url origin https://[email protected]/nkshastri/datasciencecoursera
Then try again:
git push -u origin master
(with master, not maaster)
maasterwill bemaster????