This gem is able to provide information about the computer host system, in particular on Linux systems. Commonly used programs will be queried for their current version number (and whether they exist) on the target computer. If these programs do exist, the version will then be displayed on the commandline. This is somewhat similar to the "Linux from Scratch" project, which uses a shell script to display the version of many commonly used programs. Since I dislike shell scripts, I wrote a somewhat equivalent tool for this information. For more information and documentation about this project, please have a look at the homepage of this gem, at https://rubygems.org/gems/environment_information and look at the documentation to the bottom right side, called "Documentation".