On Sat, 22 Aug 2009 05:45:00 -0400 (EDT), rpj...@crashcourse.ca wrote: [snip] > > > > no, i want to go the *other* way -- to ask what > > currently-installed packages depend *on* a given, > > currently-installed package. > > actually, even though i was asking in the context of a system in the > process of upgrading on which there is all kinds of historical cruft > so i fully expect to find older versions of packages lying around, i > just noticed that the same thing happens on a fresh (and updated) > version of lenny (5.0.2). > > here are two currently installed packages (according to "dpkg -l"): > > gcc-4.2-base > gcc-4.3-base > > my immediate thought is -- why do i need both? it's quite possible i > *do*, but i don't know how to verify that. hence my question: how > can i display what installed packages allegedly depend on > gcc-4.2-base, so that i know it's actually required to be on my > system. i realize i can simulate trying to remove it to see what > would happen, but that strikes me as messy and overkill. >
Hi, Someone correct me if I'm wrong, but I believe the command you're after is apt-cache rdepends packagename d...@subspace:~$ apt-cache rdepends gcc-4.1 gcc-4.1 Reverse Depends: linux-headers-2.6.26-1-686 gcc-doc-base gcc-doc-base gcc-4.1-doc gcc-4.1-doc gpc-4.1 gcj-4.4-jdk gcj-4.3 gcj-4.2 gcc-4.1-multilib gcc-4.1-multilib gcc-4.1-locales g++-4.1 It appears not all of those packages will be removed if you remove the gcc-4.1 package. d...@subspace:~$ sudo apt-get remove gcc-4.1-base Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: cpp-4.1 gcc-4.1 gcc-4.1-base linux-headers-2.6.26-1-686 0 upgraded, 0 newly installed, 4 to remove and 394 not upgraded. -- Dean Sutherland -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
