yum list [avaliable | installed|extras|updtes|obsolates|all|recent][pkgspec]


yum list
yum list available
yum list installed
yum list extras
yum list obsoletes
yum list updates
yum list recent
yum list pkgspec


yum list zsh
yum list joe\*
yum list \*.i386
yum list dovecot-1.0.15


yum install/remove/update


yum check-update
yum grouplist
yum groupinfo
yum groupinstall
yum groupupdate
yum groupremove
yum info yum (infromation abt yum)

yum clean
yum clean packages
yum clean metadata
yum clean dbcache
yum clean all