Sometimes installing gruntJS on Ubuntu can be problematic if your new to the command line in Ubuntu. The following commands can help you get started.

Use following set of commands to add node.js ppa in your Ubuntu system and install it.

$ sudo apt-get install python-software-properties
$ curl -sL | sudo -E bash -
$ sudo apt-get install nodejs

Make sure you have successfully installed node.js and npm on your system

$ node --version
$ npm --version

Now use following command to install grunt and grunt cli using npm command line utility.

$ sudo npm install -g grunt

After successful installation make sure grunt has been installed successful and check version.

$ grunt --version