How to commit a change to remote repository?
cd to the local project directory.
This will push your local repository to the remote git server.
Typing a URL everytime is tediouos. So, there's a way to associate a name with a URL, and make the name as default. So, you just type
git push and it'll be pushed to the default remote server.
git remote add to associate a name to the remote server address.
# cd to your project dir
# associate a name to a remote server, for the git project of current dir
git remote add gh https://github.com/project/project_init.git
# push code to the url associated with the name “gh”
git push gh