Quote:
so i get the stupid tar.gz, manage to extract it to a folder on my desktop.
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This is the whole problem--you started off with a chip on you shoulder... tar.gz files are NOT stupid---they must be treated with respect......
It seems that you have several issues: "can't install" often means a permission issue.
Step -1: Consider upgrading to the latest Ubuntu before fighting all these other battles.
Step 0: Look in the Ubuntu repositories and see if realvnc is there (maybe in one of the alternates like "universe") If it is in a repository, that is the easiest way to install.
Step 1. Fix the stupid Ubuntu "no root" thing, so you don't have to sudo:
sudo passwd root
enter your password
enter the new root password at the prompt
Now, before attempting to install (anything), type "su" to take on root powers.