Installing on Ubuntu 21.04

From reports here Rufus is "hit and miss", better to use win32diskimager on windows or DD on Linux.
I meant is Mint 20 (or Ubuntu 20 as that also works for it) current enough?
Personally i use Mint 19.3, install info on "installing LinuxCNC" section of the forum.

Hi thanks for your answer.

My comment on "obsolete" - I was referring to xfce which is is aimed at maybe a community to which I do not belong, namely Windows Users who have a Raspberry or 10 year old laptop lying around and are strangers to Linux. That's the only reason I can think of to package it as an "all-in-one" ISO with the LinuxCNC app preinstalled-. I on the other hand am a power user of Linux since 2004 and would have preferred a repository that I could add in to my existing Ubuntu Buster system

Buildbot.linuxcnc.org

GlasairMan wrote:

That's the only reason I can think of to package it as an "all-in-one" ISO with the LinuxCNC app preinstalled-. 

We used to package with Ubuntu, then Ubuntu changed the rules and demanded that all Ubuntu branding was removed from any derivative distributions. This was more work than we could support (and how can you be sure you found it all?) so we switched to Debian.

If you are a Linux Power User then you can run LinuxCNC on the distro of your choice. The ISO is to make it easier for those new to Linux. Asking _them_ to patch and build a kernel, satisfy dependencies and then build from source seems a bit much. 

GlasairMan wrote:

I on the other hand am a power user of Linux since 2004 and would have preferred a repository that I could add in to my existing Ubuntu Buster system
 

Reading this again, just noticed something wrong, there is no Ubuntu Buster.

you are right , it's hirsute (was confusing with my raspberry where there IS a Buster)

I tried to install the ppa keyring
sudo apt-key adv --keyserver hkp://keys.gnupg.net --recv-key 3cb9fd148f374fef
but it was rejected as apt-key now deprecated

Using wget , it says no valid gpg key found

gpg: Keine gültigen OpenPGP-Daten gefunden.

Any ideas ???

using the new procedure replacing apt-key.......Ubuntu 21.04 now requires a valid port number to linuxcnc.org repository in order to automatically get the key. So knowing that the key is 3cb9fd148f374fef doesn't help me at all
Looks like Ubuntu has tightened security over Debian which uses the old ppa method apt-key method

GlasairMan wrote:

Looks like Ubuntu has tightened security over Debian which uses the old ppa method apt-key method

Not according to this:
www.linuxuprising.com/2021/01/apt-key-is...ated-how-to-add.html

GlasairMan wrote:

I tried to install the ppa keyring
sudo apt-key adv --keyserver hkp://keys.gnupg.net --recv-key 3cb9fd148f374fef
but it was rejected as apt-key now deprecated

forum.linuxcnc.org/9-installing-linuxcnc...nd-easy-installation
There are 3 more keyservers there thanks to PhillC.