There are two ways to represent Unix permissions: Symbolic notation Numeric notation Symbolic notation Consists of three sets of symbols called permission class. First set represents User/Owner class Second set represents Group class Third set represents Others/everyone else class Each set consists of 3 symbols each represents a permission: “r” for read permission “w” stands for write permission “x” show execution permission Numeric notation

Sublime Text is a popular IDE that we can now install via PPA – thanks to Webupd8 team. To install Sublime text in Ubuntu run the following commands in your terminal (Ctrl + Alt + T): sudo add-apt-repository ppa:webupd8team/sublime-text-3 sudo apt-get update sudo apt-get install sublime-text-installer If you don’t want to install Sublime text and prefer to use it as a standalone application you can download it separately from http://www.

Notes; The steps in this tutorial require the user to have root permission. There are many different ways to achieve the same result but I found the following steps simpler than other methods. This tutorial has been tested on a fresh copy of Ubuntu 14.04 on a Virtual Machine (VM) To restart apache web server you can run the following command: sudo /etc/init.d/apache2 restart instal Apache2 by running the following command in command line (Ctrl + Alt + T): sudo apt-get install apache2