Last week, I looked a couple of lesser-known features for working with Debian packages, using
aptitude. This week, I want to look at a few things you can do when working with RPMs if you happen to be on a Fedora or RHEL-derived system.
One thing you may want to do is to see what package owns a file. For this you'll use
rpm -qf filename. For example, if you want to know what package owns
/usr/lib/libkonq.so.5 then you'd run
rpm -qf /usr/lib/libkonq.so.5. On Fedora 15, the command would return
Ever been confused about what configuration file or files exist for a package? It's not unusual to install a package (or have a package installed as a default) and not know exactly what configuration files are used to manage it. To determine the configuration files installed with a package, use
rpm -qc packagename. Then, to find out what configuration files exist for the
gnome-vfs2 package, you'd use
rpm -qc gnome-vfs2, which will return:
This tells you the files that go with the package, but what about a specific command? For that, combine the two options (
cf) that go with the query command. So, to find out the configuration files that apply to the
yum command, you'd use
rpm -qcf yum. This will display:
/etc/logrotate.d/yum /etc/yum.conf /etc/yum/version-groups.conf
Note that not all commands have a configuration file. If you look for
less, for example, you'll get no results.
Wondering if the files installed by a package are still in the same state as they were when installed? The
rpm -qs packagename command will display all of the files installed by the package with a notation of "normal," "replaced," "not installed" and so on. This can be useful in a number of situations -- it may help detect an intrusion, or you can use this when you're working on a client's system and need to troubleshoot a problem. (This is also good for those clients that claim they've touched nothing, when you're pretty sure they were tinkering before the system blew up.)
Finally, if you need to find a package that provides a dependency (like a library) use
yum resolvedep dependency like so:
yum resolvedep libz.so.1, which (on Fedora 15) will return
If you're on SUSE or openSUSE, don't fret -- I'll cover some tips and tricks for Zypper soon.
Joe 'Zonker' Brockmeier is a freelance writer and editor with more than 10 years covering IT. Formerly the openSUSE Community Manager for Novell, Brockmeier has written for Linux Magazine, Sys Admin, Linux Pro Magazine, IBM developerWorks, Linux.com, CIO.com, Linux Weekly News, ZDNet, and many other publications. You can reach Zonker at email@example.com and follow him on Twitter.