To understand what you’re seeing when it appears that some package is different but seems the same, you’re often looking at multiple architectures of packages (e.g.

To exclude minor version differences, you need to specify a custom rpm -queryformat that leaves the version number off.

I’ve never bothered to package this functionality up into a script because it’s so simple.

One of the first things I do is run rpm -qa | sort on each machine and diff the output to see which RPM packages may be missing on one or the other server. Using this tool you can install debug packages, source packages and you can view extended information from repositories.Sometimes I’m called on to deal with a problem that shows up only on one of two or more servers that are supposed to be configured identically, or nearly identically. Yum-utils is an assortment of tools and programs for managing yum repositories in your Linux box. One cool thing about this Linux package manager is that it lists the repository from which a package was installed: yum list installed Using YUM-Utils Using the command below will list all installed packages on your Linux box. YUM stands for Yellowdog Updater Modified is an interactive, front-end rpm based package manager. The following command will print a list of all installed packages on your Linux box, the flag -q means query and the flag -a means to list all installed packages: rpm -qa Using YUM Package Manager You can list installed Packages in Red Hat very easy with rpm.

The RPM package manager is an open source, low level package manager which runs on Red Hat based Linux distros. I usually work on Debian based Linux distros, but the other day while sorting some NYC street photos I took a friend contacted me asking me how to list installed packages in Red Hat, CentOS and Fedora.

Linux yum list installed packages