It is related to devops
The Omnibus installer is a full installation and an executable script.They provide the executable script to install packages and dependencies.
$sudo su-
sh-3.2#
sudo curl -L https://www.opscode.com/chef/install.sh | bashCurl utility is not installed by default. You can install by using the following command:
(ubuntu)
$ sudo apt-get install curl (Rehat, CentOS)
$ sudo yum install curl(Mac OSX)
$ brew install curl