Because I just posted this description in the post I wrote on how to make WordPress Auto-Thumbnails work, I thought I would also post those…
Yum
Yellowdog Updater, Modified (YUM) is an open source command-line package-management utility for computers running the GNU/Linux operating system using the RPM Package Manager.
Though YUM has a command-line interface, several other tools provide graphical user interfaces to YUM functionality.
A simple yum command might be sudo yum update all
which updates all relevant packages in a Linux based system.
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