almalinux-deploy VS Raspberry-Pi

Running another 8.x? Move to AlmaLinux using almalinux-deploy.

I mention that because you had to be at CentOS 8 latest, and since CentOS is now a stinkin pile of nothingness, there are adjustments path wise to point at Alma's capture of that in order to prep to make the jump. I think all that is documented here: https://github.com/AlmaLinux/almalinux-deploy

You can also convert an Oracle Cloud to Alma or Rocky then install ApisCP. If you do, append -s has_low_memory=1 to the installer.

If going with Oracle Linux it's necessary to convert to Alma or Rocky before installing the 30-day trial. This also doubles as a great hack for a free 1 GB DNS-only server.

Just follow those steps to migrate centos to almalinux: https://github.com/AlmaLinux/almalinux-deploy

I understand from here that it is recommended to update to CentOS 8.5. I have carefully inspected the recommended approaches from the README and this issue and attempted to cobble together something that I believe should work but I am facing some issues.

I used the Almalinux deploy script to switch to Alma.

A version of our Open Source hosting control panel (BlueOnyx 5210R) was initially shipped with CentOS 8 as base OS before we switched the installation media to AlmaLinux. Those that were still running CentOS 8 were informed via the GUI to convert to AlmaLinux by running the AlmaLinux conversion script that we had bundled with an update or ours.

Thanks for the questions. We already have several migration options. If you're currently on CentOS 8 or any other EL8 you can use this: https://github.com/AlmaLinux/almalinux-deploy. If you are on CentOS 7.x you can use our ELevate project: https://almalinux.org/elevate.

I don't know x86, but I use ARM startup code called SmartStart by Leon de Boer that sets up everything for a Raspberry Pi before calling kernel_main (different models have different ARM CPU's and it handles the slight variations of each -- see SmartStart32.S for the 32 bit version and SmartStart64.S for 64).

For the Raspberry Pi I'd start with this "hello world" project . It gets you booted up, and control transferred to your OS in C starting at int main(). It provides printf functionality to the screen (and basic 2D graphics), access to many of the hardware registers, hardware timer and interrupts. Plus some global variables and functions relating to the system (made available in the .S startup loader).