I'm not able to do much with apt and yum. I'll search for stuff with them but it hardly ever finds anything usefull.
More repositories is my guess? That's just it; I don't know.
It's taking me hours to get a GIS installed that I already downloaded!
Learn this! Learn that!
"Oh - "excuse, good excuse, even a GREAT wonderfull LOVELY exuse!"
This boils down to:
"You really should know all about this wonderfull stuff we made to help you out - it's really cool and all - before we'll let you install grass. It's just so WONDERFULL -

How could you not understand?"
"Have a nice day

"
sigh... I can't get those dependencies installed with apt. What should I do? I just don't know! (can't pull answers out of thin-air! Even if I try really hard!)
Too bad installing something with a single download/click is morally wrong.
...knock me with that sledgehammer one more time! Ready? ...Go!
... thanks in advance! (and I'm not being sarcastic with that one, really).