Tue, 5 May 2020 22:32:34 +0100 (BST) - Jim Jackson <jj@???>:

> Hi, I'm seeking advice.
> I need a more upto date version of QGIS, geographical information system,
> than is in ASCII - I need a version 3.
>
> On the QGIS downloads site ...
>
> https://qgis.org/en/site/forusers/alldownloads.html#linux
>
> It gives info for adding to sources.list for debian/ubuntu systems. Is
> there any chance any of those given would work with Devuan?

Sure:

debian buster -> devuan beowulf
debian jessie -> devuan ascii

Looking at:
https://qgis.org/debian-ltr/pool/main/q/qgis/
seems the LTR qgis versions are: version 2 for jessie/ascii, version 3 for
buster/beowulf...

Adding to your sources.list:
~~~
deb     https://qgis.org/debian buster main
deb-src https://qgis.org/debian buster main
~~~
you could try to install qgis version 3 on ascii, but I dubt you will succeed
because of dependencies... 

Maybe you need to "risk" upgrading to beowulf...
I dit it a couple of weeks ago: success!!! I had just to manually fix some
minor details related to MATE new (buggy?) version...

Regards

--
al3xu5

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