Downloaded the nearly One GIgabyte Linux Driver file from here: https://support.amd.com/en-us/download/embedded?os=Linux_tmp%20x86_64 ( same Linux driver that you have I believe).
Unable to uncompress BZ2 File. Found this Website that shows how to use Command Prompt from Linux OS to Uncompress the file: How to untar a tar file or gzip-bz2 tar file | How To Wiki | FANDOM powered by Wikia :
Copied from above link:
How to untar a tar file or gzip-bz2 tar file
Tar file can come compressed or uncompressed. Generally that are compressed using gzip or bzip2. The program, tar, will uncompress both types and extract the files from archive.
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Steps 
Edit
- Type at the command prompt
- tar xvzf file.tar.gz- to uncompress a gzip tar file (.tgz or .tar.gz)
- tar xvjf file.tar.bz2 - to uncompress a bzip2 tar file (.tbz or .tar.bz2) to extract the contents.
- tar xvf file.tar - to uncompressed tar file (.tar)
- tar xvC /var/tmp -f file.tar - to uncompress tar file (.tar) to another directory
- The files will be extracted in the current folder (most of the times in a folder with the name 'file-1.0').
- x = eXtract, this indicated an extraction c = create to create )
- v = verbose (optional) the files with relative locations will be displayed.
- z = gzip-ped; j = bzip2-zipped
- f = from/to file ... (what is next after the f is the archive file)
- C = directory. In c and r mode, this changes the directory before adding the following files. In x mode, changes directoriy after opening the archive but before extracting entries from the archive.
Couldn't Uncompress using Command Prompt from Windows but I believe these commands are for Linux OS Command Prompt.
Here another Linux website with similar instructions: https://www.hostingadvice.com/how-to/untar-file-linuxubuntu/ :
Usually a tar file is also compressed using either the gZip or bZip2 compressor. We’ll cover both.
1. If Your File Extension is .tar.gz (or .tgz)
If your tar file is compressed using a gZip compressor, use this command:
1 | tar xvzf file.tar.gz |
The options are pretty straightforward for this:
x: This tells tar to extract the files.
v: This option will list all of the files one by one in the archive. The “v” stands for “verbose.”
z: The z option is very important and tells the tar command to uncompress the file (gzip).
f: This options tells tar that you are going to give it a file name to work with.
2. If Your File Extension is .tar.bz2 (or .tbz)
If your tar file is compressed using a bZip2 compressor, use this command:
1 | takes xvjf file tar .tbz |
This is just about the same as the gzip decompression. The major difference is that the z optionhas been replaced by the j option.
If you remember, the z option was the uncompress (specifically gzip) flag, so it makes sense that this would be switched out.
j: This will decompress a bzip2 file.
3. Mind-Blowingly-Simple Extraction (The dtrx Function)
There are only a handful of people that actually remember all of the options for the tar command. Luckily, Linux folks are great at making things easier.
Standing for “Do the Right Extraction,” dtrx works as you would hope. The command should be simple for both gZip and bZip2 files:
1 | dtrx file.tar.gz |
1 | dtrx file.tar.bz2 |
Installing dtrx
To install dtrx, just use apt-get:
1 | sudo apt-get install dtrx |
I believe you can download and install DTRX for Ubuntu from here: dtrx : Xenial (16.04) : Ubuntu .
NOTE: Needed to delete previous comment due to weird typing format when saved. Redid comment better this second time around.
Hi, I have another thread open about this too.
Problem downloading Linux 18.20 drivers for Ubuntu 18.04
Glad to see I'm not going crazy 
Please post here if you get any updates from your AMD ticket! And if anyone else is reading this with an old/working copy of the driver archives please feel free to share...
