yum list installed muestra el listado de los paquetes actualmente instalados en el sistema.
$ yum list installed Paquetes instalados audit-libs.x86_64 2.2.1-1.fc17 @fedora/$releasever authconfig.x86_64 6.2.1-1.fc17 @fedora/$releasever basesystem.noarch 10.0-6.fc17 @fedora/$releasever bash.x86_64 4.2.24-2.fc17 @fedora/$releasever binutils.x86_64 2.22.52.0.1-10.fc17 @fedora/$releasever bzip2.x86_64 1.0.6-4.fc17 @fedora/$releasever bzip2-libs.x86_64 1.0.6-4.fc17 @fedora/$releasever ca-certificates.noarch 2012.81-1.fc17 @fedora/$releasever chkconfig.x86_64 1.3.59-1.fc17 @fedora/$releasever cloog-ppl.x86_64 0.15.11-3.fc17.1 @fedora/$releasever coreutils.x86_64 8.15-6.fc17 @fedora/$releasever lib.x86_64 1.2.5-6.fc17 @fedora/$releasever ... [muchos otros]