The Hub refuses to install anything but the latest version, betas or LTS versions. The download archive doesn’t contain Linux links. Because Unity Hub is a portable app it doesn’t register the unityhub:// thing, so that doesn’t work either.
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Hello! Open your terminal and paste, for example,
$DIR/UnityHub.AppImage unityhub://2018.3.0f2/6e9a27477296 and wait ($DIR - directory to unityhub image)
It’s open this file to dowload in unityhub.
but, it’s might working not well
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Thanks @ajv3tr Worked just fine for me!
You can also use the page Download Archive. It has an "Unity Hub’ links for each version.
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Those don’t work on Ubuntu 20.04
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Weird. It’s working on my end.
They do not work for me either. @KevinWelton try going to that page and clicking the “hub link” for:
Unity 2019.3.11
It does not work and I don’t think it ever has. If Unity supports Linux, there should be download links for Linux as there are for other supported systems.
For now you can workaround by downloading the following JSON file: https://public-cdn.cloud.unity3d.com/hub/prod/releases-linux.json
This contains the download links for the Linux editors.
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I managed to do this the other day, downloading an earlier 2020. Perhaps uninstall existing hub/hubs and install latest
I definitely believe that it isn’t working on your end. I just can’t repro it on my end with Hub version 2.3.2 and downloading the versions mentioned in this thread via the “Hub” link at the download archive in 18.04, 20.04 or CentOS 7. Is the hub running when you click the link? Does the hub open at all? I think the simplest thing to try would be the suggestion above of re-installing the hub.
Which, BTW, you no longer have to visit the forum post to get. You can finally get it by the regular hub download page via the Unity web page 
I had try re-installing the hub several times… it just never opens the download. Before, on older unity hub versions and Linux mint 19 it opened just fine… it took a few seconds from pressing the “Open in Hub” button, but it opened. Now on Linuxt mint 20 (Ubuntu 20.4) no longer opens.
Just an update. I am able to repro this.
The Hub, as of version 2.3.2, no longer performs desktop integration when first run. There is an issue open at Unity Issue Tracker - [Linux] The Unity Hub AppImage doesn't ask to integrate into the system when launching for the first time. If you are having problems downloading via the hub, you can give this issue an upvote.
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Also not working on my Linux mint install v20, clicking buttons does nothing at all except throw 404 errors in the browser debugger, does not work on chrome or firefox, though I note from KevinWelton’s link its is marked a ‘wont fix’, so how about a work around how we can actually download a particular version??
Is there a URL/link where we can download versions since its a known bug in the unity hub?
Is there a way to download a earlier version of unity hub which works?
Or is the answer to just not develop any software until unity gets around to fixing the issue???
Ok, for anyone with this issue, a work around.
Go to the download archive page right click the green button, inspect element, look at the href for example:
Open terminal, go to locaion of your UnityHub.AppImage and type the bit from the href for example:
./UnityHub.AppImage unityhub://2019.4.18f1/3310a4d4f880
This will open that image in the unity hub.
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@alphabeta314 , try the steps on this stickied thread for a workaround to the integration issue. It will allow you to click Hub links in the download archive and have them open correctly in the Hub.
I think a better description of the bug resolution is “Postponed” more than “Won’t Fix”. I’ve chatted with the Hub team and they do want to fix it.
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So the hub links are mostly not working, because unity-hub is not correctly installed. Or at least it’s not registering itself to handle the URI with xdg.
In my case, I’m using:
- Ubuntu 20.04lts
- XFCE Desktop Environment
- Chrome Official
The problem is chrome wants to start it with ‘xdg-open’, and there is not an entry for unity-hub with xdg. So it doesn’t know how to open it’s type. I’m yet to have taken the time to figure out how to configure this manually. But I imagine that someone could find a way.
It gives the error:
It might make sense to have unity hub check / register itself upon a first start. Or if not, having the links available would be nice. But you can obtain this pretty easily by right clicking the button and saying, “Copy link”. And then you can pass that to unityhub via the command line (As demonstrated above).
However
I have another issue entirely, and that’s I cannot download this for an internal network/administration install. I need some way of getting a download of unity to install it for local machines. Which linux is currently missing from that list.
Update
I have found a work around to my problem, which gives a way to download it.
Using: Download Archive
I found my version and copied the link I needed:
unityhub://2018.4.20f1/008688490035
(Don’t do) When I tried to install with:
./unityhub unityhub://2018.4.20f1/008688490035
It of course does not want to reinstall and it quits.
But if I use:
./unityhub --headless install -version 2018.4.20f1 --changeset 008688490035
It will download+install.
With that, I noticed it creates a folder in /tmp:
/tmp/unityhub-XXXXXXXX-XXXX-XXXX-XXXXXXXX
which inside contains:
Unity.tar.gz
Which is exactly the file I need.
@chibiskuld , make sure you’ve follows step 1 and 2 in the pinned Unity Hub workaround thread .
Once you’ve done this, you should be able to open links from the Unity Download Archive.
I find it a bit strange that there are no linux links , installing software via command line is so common on linux…
One of the things that make people shake their head thinking “Unity yududis?!”
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Thank you so much, this work on ubuntu mate 20.04