How to install npm for less in ubuntu

sudo apt-get install curl 
curl -sL https://deb.nodesource.com/setup_0.10 | sudo bash - 
sudo apt-get install -y nodejs 
sudo npm install -g npm (to update npm) 
ln -s /usr/bin/nodejs /usr/bin/node 
sudo npm install -g less less-plugin-clean-css


* Complete uninstall of nodejs and npm
DO: apt-get autoremove --purge nodejs npm
rm -rf /usr/local/{lib/node{,/.npm,_modules},bin,share/man}/{npm*,node*,man1/node*}
rm -rf /usr/local/bin/npm /usr/local/share/man/man1/node* /usr/local/lib/dtrace/node.d ~/.npm ~/.node-gyp /opt/local/bin/node opt/local/include/node /opt/local/lib/node_modules
rm -rf /usr/local/lib/node /usr/local/lib/node_modules /var/db/receipts/org.nodejs.*

* Remove all npm packages globally
DO: npm -g ls | grep -v 'npm@' | awk '/@/ {print $2}' | awk -F@ '{print $1}' | xargs npm -g rm

sudo apt-get install -y nodejs