From the terminal session you posted, I'm guessing either the file isn't where you are telling the tar command where it is or the download is corrupted somehow and is not a valid file. If you are 100% positive that you have the path and filename correct, would redownload the file.
Yet another hobbyist trying to teach himself electronics and embedded systems. I was a programmer for 10y, mostly server-side and the beginnings of J2EE but got frustrated with the layers upon layers of abstraction so I decided to start programming on the bare metal in my spare time. I played around with AVRs before Arduinos existed and enjoyed that but I've been told that you get better if you branch out to other micros. So, here I am.
I already have a collections of launchpads and have worked through the MSP430 workshop that TI has online so I think I have a good basis to start with. Now I'm off working on my first project, an RGB LED strip driver that I can control the color and brightness. Should be fun.