yum list installed
3. Using YUM-Utils
Yum-utils is an assortment of tools and programs for managing yum repositories, installing debug packages, source packages, extended information from repositories and administration.
To install it, run the command below as root, otherwise, use sudo command:
# yum update && yum install yum-utils
Once you have it installed, type the repoquery command below to list all installed packages on your system:
# repoquery -a --installed
Repoquery – List All Installed Packages
To list installed packages from a particular repository, use the yumdb program in the form below:
# yumdb search from_repo base
List All Installed Packages from Repository