yum Commands

List commands (including a list of installed packages, or ones ready to be updated)
        yum list
        yum list installed|less
        yum list updates|less

Install a package
        yum install package

Install a group of packages (don't forget quotation marks)
        yum groupinstall "groupname"

Search for a package
        yum search
        yum search package

Remove a package
        yum remove package

Update via yum (including a list that need to be updated)
        yum update

Notable links: