I was wanting to tinker around with TCL/TK programming.

I tried to invoke the wish shell, but got this error:

$ wish
The program 'wish' is currently not installed. You can install it by typing:
sudo apt-get install tk

So, I tried to apt-get install tk:

$ sudo apt-get install tk
Reading package lists... Done
Building dependency tree       
Reading state information... Done
tk is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

But it's already installed...

Where did wish go?