Arch Linux is a simple and lightweight Linux distribution, and was created with the KISS principle. A part of the base of Arch Linux is the pacman package manager, which then makes it easy to install and update applications and how they work with each other. The simplicity and open community is conducive to attracting developers as well as using the operating system on a day-to-day basis. Power users can make changes to how their systems works, both visually and technically.
A Ruby Gem is a package that contains code and executables. A Ruby Gem package allows developers to bundle up the code into a single package that can be installed through one process. Gem is great for shell scripting, system administration, and application scripting. You can easily open a local or remote file on the command line. gem goes beyond simply splitting lines of files; it does word splitting too. And you can check to see if two words are in the same group made of delimited words.
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rpm-guide
Check this article to learn how YUM repository and metadata work internally.
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talks-and-slides
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security
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