@Desmond, you should have posted this under 'Open source'!!
If you download a Linux package in <package>.tar.gz2. Uncompress the package.
Again use 'tar' command to uncompress the package again. Now you will get a
directory created in the same directory where you uncompressed it.
There will be a README file. Read it for further instructions. Now login as root.
$ su -
(Enter password)
$ ./<executable-file>
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