Command to check wheather a software package is installed in fedora

hi,

There is a command which tells weather a software package is installed or not in your system.

the command is

$ rpm -q   packagename

you have to replace the package name what you are searching for...

eg:

[parthi@localhost ~]$ rpm -q ruby
ruby-1.8.7.334-1.fc14.i686
[parthi@localhost ~]$ rpm -q mayavi
package mayavi is not installed


have fun :)