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Last active August 29, 2015 14:00
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Debian/apt: See why a package is installed
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Bookmark.rst 
$ apt-cache rdepends --recurse $package

probably gives too many packages

I would add --installed option to restrict to installed packages. -i option restricts to pre-dependence and dependence related packages.

But a package may be installed because it is recommended by another package. To include such recommendation relateded packages, I suppose this would give the right ones:

$ apt-cache rdepends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances --installed --recurse $package

@source: http://askubuntu.com/questions/5636/can-i-see-why-a-package-is-installed#comment505140_5637

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