List installed packages
# yum list installed
Removing package without dependent packages, use witch caution!
# rpm -qa | grep "php-sqlite2" php-sqlite2-5.1.6-200705230937 # rpm -e --nodeps "php-sqlite2-5.1.6-200705230937"
Which repository was package installed from ?
# yum install yum-utils # repoquery -i package_name