How to upload a files to a repository on github using gitbash

Shell
git init
git add .
git commit -m "message for the commit"
git remote add origin https://url-of-github-repo
git push origin master or git push -f origin mastergit add .
git commit -m "message for the commit"
git remote add origin https://url-of-github-repo
git push origin master
Source

Also in Shell: