yum check-update
yum update
yum install man
Also, agree to install:
yum -y install man
yum list <exact package name> yum search <foo>
yum list installed
yum list
rpm -q <package>
yum reinstall <package>
yum installed -v [package]
yum install yum-utils repoquery --list <package>
yum provides /usr/bin/foo # or (requires yum-utils) repoquery -f /usr/bin/foo
yum grouplist
yum groupinfo -v "FTP Server"
yum repolist [-v]