eca13bf4_chef_client___Chef_Docs__Description
[Stages] Get the install script from Chef [Description] 
On UNIX- and Linux-based machines: The shell script that is derived from the chef-full.erb bootstrap template will make a request to the Chef website to get the most recent version of a second shell script (install.sh). On Microsoft Windows machines: The batch file that is derived from the windows-chef-client-msi.erb bootstrap template will make a request to the Chef website to get the .msi installer.
chef-client — Chef Docs
Description