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An administrator on a Red Hat Linux system would use which of the following commands to update software?

A yum

The yum command (Yellowdog Updater Modified) is used to install, update, uninstall, and search for software packages. The syntax to execute is yum [options] [args?...].  To display a list of installed packages, for example, type yum list installed. The pwd (print working directory) command writes the full path from the root to the current (working) directory on whatever the default output device is (usually the display.) The ls utility shows a list of all the files and folders in the current directory. The cp command copies files and directories.

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