Hello, Flavio Bessa.
On 27/12/20 14:07 you wrote:

 FB> Hello everybody.
 FB>         I have created a Debian VM to run Mystic, but I am 
 FB> experiencing a few difficulties when trying to uncompress the 
 FB> Mystic binaries from the website: they always fail.
 FB> I am using unrar-free to unpack them. Any hints on what could be 
 FB> the cause? Flavio

Try with this:

ftn@balabam:~$ dpkg -l | grep "rar "
ii  rar                                    2:5.4.0+dfsg.1-0.1                
amd64
        Archiver for .rar files

RAR 5.40   Copyright (c) 1993-2016 Alexander Roshal   15 Aug 2016
Trial version             Type RAR -? for help

It should be available through the standard debian apt repository.

Let me know if it works. ;)

--
Ciao.
Fabio.
--- Hotdoged/2.13.5/Android