It is in Trisquel http://packages.trisquel.info/search?keywords=unar
You're mistaking unar (command-line version of The Unarchiver) with unrar.
There is no such thing as "unar-free". unar supports all versions of RAR.
unrar-free "Can't handle some archives in the RAR 3.0 format natively."
Unar is very interesting alternative that should be in Trisquel. Why? Because
we must create the best, libre, GNU/Linux distro ever. If we can support
printers - we should add support to system (cups), if we can scan, we
Unar is on the Parabola's repos. Of course it should be on Trisquel's too! I
use it and it's very useful
I heard unar-free cannot do v3 of RAR files, but unar can. Maybe newer
versions of unar-free can now. I just don't use RAR files anymore.
https://directory.fsf.org/wiki/Unar
no, 'unar' it can also extract 'rar' files.
Do you know "unrar-free"?
