I joined the forum today. Coming to look for help with MATE on PI 4. Complete noob. Well not completely... I was using the ODROID XU4 computer for about 2 years with Armbian OS. I couldn't get Ubuntu to work well on it. So I settled for Armbian which did the job as a server, but as a desktop I couldn't get it to be a great experience. Then the USB3 ports on the XU4 died, and after some research I found that this was a common problem with the XU4 and I wasn't thrilled with the idea of getting a replacement. Well it seems like the moon and the stars were perfectly aligned for me to find that the PI 4 computer is available, with equal/better processing power to XU4 when it's overclocked, and Ubuntu is available for it. And there is a whole community of PI users helping each other. I am immediately sold.
Now I got everything up and running. But I ran into some minor issues, only the kind of issues that a newbie would have.
This is the image I used:
I was trying to follow this guy on youtube doing a temperature test and I found out that my Ubuntu MATE image for PI 4 doesn't come with some raspberry pi tools such as rpi-eeprom-update (for firmware updates) and vcgencmd (for hardware sensor access). The official raspberry pi OS "Raspbian" has those tools but I don't want to use Raspbian. Can I add raspi tools to Ubuntu?
I tried putting this line in /etc/apt/sources.list:
deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
But this is the kind of error I get:
N: Skipping acquire of configured file 'main/binary-arm64/Packages' as repository 'http://raspbian.raspberrypi.org/raspbian buster InRelease' doesn't support architecture 'arm64'
Because, obviously I did the wrong thing which was to copy the line from someone elses' settings that I found online. And try as hard as I could, the answer to whether I could download rpi tools to Ubuntu was not resolved through google search. Is there is a kind or wise soul out there to point me in the right direction, I would be most grateful. If it can't be done, then I will want to find some equivalent tools. Specifically I want to be able to record / plot the temperature sensors.