What is yaourt
Yaourt is a utility for Arch Linux that provides an easy way to install programs from AUR (Arch User Repository). Pacman cannot search the AUR for programs so if you want to install a program from AUR you have to do it manually. I have already describe how to install an AUR program manually at a previous article .
Yaourt searches AUR for programs, downloads them, install the missing dependencies and then compiles and installs them. Because yaourt uses pacman it can also install packages from the repositories or upgrade them.
How to install yaourt with pacman
You can install yaourt with pacman but first you have to add the proper repository to pacman.conf. So, you must edit the file /etc/pacman.conf. To do this you can use nano, vim or gedit: