How to install Homebrew (brew) on OS X El Capitan 10.11

Homebrew or simply brew is a package manager which helps install and manage lots of Unix tools and software on your OS X.
It doesn’t come with OS X El Capitan, but it can be installed manually.

If you don’t have Xcode installed on your computer than you have to download and install up-to-date Xcode version from this page On the moment I’m writing this the last version is 7.3.1.

Then install Xcode command line developer tools with the following command at your terminal
xcode-select --install
This will open dialog window guiding you through the installation.

And we are finally ready to download and install Homebrew, to do it just execute

ruby -e "$(curl -fsSL"

Homebrew installation output in the terminal

And then test it with
brew help
Testing Homebrew with brew help