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   Linux FAQ > 9. Miscellaneous Information and Questions Answered
Question:  9.3. How To Determine What Packages Are Installed on a System.

For distributions that use RPM format packages, use the command:

   $ rpm -qa

You need to be logged in as root. You can save the output to a text file for future reference, a command like:

   $ rpm -qa >installed-packages

For Debian systems, the equivalent command is:

   $ dpkg -l

This FAQ is from Linux Frequently Asked Questions with Answers, maintained by Robert Kiesling

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