basic commands for using less (tested in debian)

less instructions

/* -----------------------------------------
   Install node.js and npm in Debian
----------------------------------------- */

sudo apt-get install python-software-properties
sudo apt-add-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs
sudo apt-get install npm

/* -----------------------------------------
   Using less
----------------------------------------- */

sudo npm install -g less // install less in global way
lessc input.less > output.css // compile input.less file to output.css file
lessc input.less // compile input.less file and show in std out