E: Unable to locate package code code example
Example 1: E: Unable to locate package npm
curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
sudo apt-get install -y nodejs
Example 2: E Unable to locate package sl
sudo apt update
Example 3: unable to locate package ubuntu
sudo apt install
Example 4: unable to locate package dos2unix
deb http://al.archive.ubuntu.com/ubuntu/ precise universe