Re: .TAR file and software download basics
Look for software in this order:
1. In the Ubuntu repositories
2. In third-party repositories or PPAs (do a search for the program's name and "ppa", for instance, "skype ppa")
3. A .deb package
4. A binary installer (with ".sh", ".bin" or ".run" as the file extension, usually)
5. A .tar.gz package
In other words, look for a PPA containing the software. There is usually one.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.