====== sync Arduino projects folder **to** GITHUB ======
Make "ArduinoProjects" repository first at github

<code>
 cd Arduino/
 echo "#Arduino Projects" >>README.md
 git init
 git add *
 git commit -m "first commit"
 git remote add origin git@github.com:<user>/ArduinoProjects.git
 git push --all origin
 git push --all origin -u
</code>

====== sync Arduino projects folder **from** GITHUB ======
<code>
cd /home/username/Arduino
git init 
git remote add origin git@github.com:<user>/ArduinoProjects.git
git pull origin master
git push --all origin -u
</code>

====== update repository to GITHUB ======
<code>
cd /home/Arduino
git push
</code>

====== Create local repo and Upload content to GITHUB ======
Make repository first at github
(assuming local directoryname = reponame)

<code>
cd <reponame>
echo "# <reponame>" >> README.md
git init
git add README.md
git commit -m "first commit"
git remote add origin git@github.com:<user>/<reponame>.git
git push -u origin master
</code>