How to run rosdistro command?

edit

I use ubuntu 12.04 64 bits with ROS groovy.

I followed rosdistro page.

I install rosdistro by these commands:

sudo apt-get update
sudo apt-get install python-rosdistro

But I still can't run rosdistro on terminal.

sam@sam:~/code/groovy_overlay/devel/bin$rosdistro
rosdistro: command not found
sam@sam:~/code/groovy_overlay/devel/bin$

I found I have two tool similar with rosdistro:

rosdistro_build_cache  rosdistro_reformat

How to solve it?

Thank you~