Robert P. J. Day wrote: > On Sun, 23 Aug 2009, Jörg-Volker Peetz wrote: > >> Robert P. J. Day wrote: >>> this should be an easy one: on my current (etch) system, there are >>> a number of packages that have more than one version installed. for >>> example (and from memory), there are at least three versions of gcc >>> installed. am i safe to remove/purge the older ones? >>> >>> perhaps a better question is, what is the command to list the >>> packages that depend on a certain package? in fedora, i'm used to >>> running: >>> >>> $ rpm -q --whatrequires <package> >>> >> aptitude comes in handy here: >> >> aptitude search '~i~D^<package>$' >> >> Since aptitude uses regular expressions search <package> is enclosed >> by ^ and $ to distinguish, e.g., between gcc-4.3 and gcc-4.3-doc. > > i'm not sure what that's supposed to show me. let me give you an > example from my running lenny system. if i run: > > $ apt-cache rdepends acpid > > i get a list that includes, among other things, two installed > packages -- acpi-support and acpi-support-base -- and a bunch of other > packages that *aren't* installed. > > what i want now is a way to list only the *installed* reverse deps > of acpid. if i run (as you suggest): > > $ aptitude search '~i~D^acpid$' > > i get null output. what do you *think* i should see? > > rday <snip> On my systems the output of
$ aptitude search '~i~D^acpid$' is i acpi-support-base - scripts for handling base ACPI events such since I have not installed package acpi-support. By the way, in order to get the list of all packages which are not marked auto and are not dependencies or recommendations of other packages issue $ aptitude search '~i!~M!(~R~i|~Rrecommends:~i)' -- Regards, Jörg-Volker. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
