Freshman
Add sudo user
su
apt install sudo
sudo adduser grey sudo
#then restart
Install https
#if The method driver /usr/lib/apt/methods/https could not be found.
sudo apt-get install apt-transport-https
Unable to import GPG key
wget --no-check-certificate -q -O - http://pkg.jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add -
