How to check the changelog of a package on Linux

Question: When I install or upgrade a package on Linux, I want to find out what changes (e.g., new features or bug fixes) have been made in the package before or after installing it. How can I view the changelog of a (Deb/RPM) package on [Debian, Ubuntu, CentOS, Fedora]? When a program or a library […]
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How to install non-free packages on Debian

Question: I need to install some proprietary device driver on Debian, which is part of a non-free package. However, I cannot find and install the package in my Debian box. How can I install non-free packages on Debian? The Debian project is distributed as a collection of packages, 48,000 of them, as of Debian Wheezy. […]
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How to check if .deb package is installed

Question: How can I check whether or not a particular .deb package is installed on Debian or Ubuntu? If you want to check if a particular Debian package is installed on your system, you can use dpkg command with “-s” option, which returns the status of a specified package. Use the following command line to […]
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