[Solution] Error in the installation page for linux systems

In the installation page for the gpredict software for linux: Gpredict Donwload Information

The unpack command should be just tar -xvf gpredict-x.y.z.tar.bz2 instead of the original.(z flag is used only for tar.gz files)
PFA the error image for the same, hope this helps!

j flag would be needed for bz2 files.

But the file name must always come directly after the f flag, so the command should be tar -xvjf gpredict-x.y.z.tar.bz2

on modern distros you can often get away with not specifying compression at all when extracting, xvf is then enough. I’d refrain from using sudo when it’s not needed as well.

Yeah, it worked when I added the j flag.

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Alright, will keep this in mind. Thanks!