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Fedora 18/19, PackageKit, KSplice and Failed Backend Message

A couple of months ago, the PackageKit utility on my Fedora 18 system stopped working. YUM continued to work so I had an easy workaround and did not really try to trace down the problem and fix it. I assumed that a future version of a PackageKit RPM would fix the problem. Recently I did a FedUp upgrade to Fedora 19 and the problem persisted so I decided the time had come to investigate the root cause of the problem and fix it. Here is how the problem manifested itself: A quick check of Fedora Bugzilla convinced me that the

List or Count Installed RPM Packages

If you are on a RPM-based Linux platform (such as Redhat, CentOS, Fedora, ArchLinux, Scientific Linux, etc.), here are two ways to determine the list of packages installed. Using yum: yum list installed Using rpm: rpm -qa You can also easily get a count of the installed packages by piping the output to wc: yum list installed | wc -l rpm -qa | wc -l

Fedora 17 "Error: Protected multilib versions"

Getting an error like the following when installing a package or group of packages on your Fedora 17 system? Error: Protected multilib versions: XXXXXXXX.fc17.i686 != XXXXXXXX.fc17.x86_64 This is because whenever you have both 32 and 64 bit versions of a package, they must be of the same version and release. The error message is showing you that the 32 bit version-release of the package does not equal (!=) the 64 bit version-release. You either need to update the 32 bit version to match the 64 bit version, or erase the 32 bit version to get rid of this error. While