$ git clone url_of_your_remote_repository   # Clone a repository from a remote repository  
$ git add file1 file2    # will add those two files to the index if they were modified  
$ git commit -m "Meaningful commit message"   # will commit those two files (locally)  
$ git add .   # will add all of the modified files to the index at once  
$ git commit -m "Other meaningful commit message"   # will commit all of those files together  
$ git push origin master   # send all commit to the remote server