sudo：rosdep: command not found

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Hi, everyone!

I'm installing ROS indigo on Ubuntu 14.04 LTS and following the instructions on this website: http://wiki.ros.org/indigo/Installati...

After step 1.4, I run $ sudo rosdep init, it says "sudo: rosdep: command not found". I think I've downloaded python-rosdep pack. Here's what I did:

~$ locate rosdep
/var/cache/apt/archives/python-rosdep_0.11.4-1_all.deb

~$ cd /var/cache/apt/archives
/var/cache/apt/archives$ sudo rosdep init
sudo：rosdep: command not found

Did I miss any step? Or did I do something wrong?

Thanks! Any help will be appreciated.