Macs come standard with the "say" command, which translates text into speech. It's pretty easy to do the same thing on linux, using a package called 'festival'.
Install the app_
Then try it out_
If you get an error message that says "can't open /dev/dsp", do the following_
and paste in the following lines_
Now, save the file, and try it again.
I added a little alias, as well. Open up your ~/.bashrc and add these lines_
Now the command requires much less typing_