Chef | Opscode. Chef Environment Variables. In UNIX, a process’ environment is a set of key-value pairs made available to the process. Often, programs expect their environment to contain information required for the program to run. The details of how these key-value pairs are accessed depends on the API of the language being used. This article explains how environments of child processes interact with their parent process and how to ensure that services and applications are started with the proper environment.
Child Processes and Inheritance Child processes inherit a copy of their parent’s environment. Consider the following example: % WOO="woo" #Set a shell variable % echo $WOO woo % bash #Start a new process, a child of our first shell % echo $WOO # Shell variable is empty because we didn't export it % exit # Return to original shellexit % export WOO # Export variable % bash % echo $WOO #Shell variable now available in children. woo % exit As mentioned, the child process gets a copy of its parent’s environment. Upstart Services. Maven. Search.maven.org. Export dot separated env variables. Vagrant. Vagrant Documentation. The Vagrant getting started guide will walk you through your first Vagrant project, and show off the basics of the major features Vagrant has to offer. If you're curious what benefits Vagrant has to offer, you should also read the "Why Vagrant?
" page. The getting started guide will use Vagrant with VirtualBox, since it is free, available on every major platform, and built-in to Vagrant. After reading the guide though, don't forget that Vagrant can work with many other providers. Before diving into your first project, please install Vagrant. More of a book person? $ vagrant init hashicorp/precise32 $ vagrant up After running the above two commands, you'll have a fully running virtual machine in VirtualBox running Ubuntu 12.04 LTS 32-bit. Now imagine every project you've ever worked on being this easy to set up. The rest of this guide will walk you through setting up a more complete project, covering more features of Vagrant.