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Title: Old Computer Challenge v3: day 1
Author: Solène
Date: 10 July 2023
Tags: occ oldcomputerchallenge
Description:
# Day 1
Hi! Today, I started the 3rd edition of the Old Computer Challenge.
And it's not going well, I didn't prepare a computer before, because I
wanted to see how easy it would be.
Old Computer Challenge v3
* main computer (Ryzen 5 5600X with 32 GB of memory) running Qubes OS:
well, Qubes OS may be the worse OS for that challenge because it needs
so much memory as everything is done in virtual machines, just handling
USB devices requires 400 MB of memory
* main laptop (a t470) running OpenBSD 7.3: for some reasons, the
memory limitation isn't working, maybe it's due to the hardware or the
7.3 kernel
* main laptop running OpenSUSE MicroOS (in dual boot): reducing the
memory to 512MB prevent the system to unlock the LUKS drive!
The thing is that I have some other laptops around, but I'd have to
prepare them with full disk encryption and file synchronization to have
my passwords, GPG and SSH keys around.
With this challenge, in its first hour, I realized my current workflows
don't allow me to use computers with 512 MB of memory, this is quite
sad. A solution would be to use the iBook G4 laptop that I've been
using since the beginning of the challenges, or my T400 running OpenBSD
-current, but they have really old hardware, and the challenge is
allowing some more fancy systems.
I'd really like to try Alpine Linux for this challenge, let's wrap
something around this idea.
# Extra / Tips
If you joined the challenge, here is a previous guide to limit the
memory of your system:
occ.deadnet.se: Tips & Tricks
For this challenge, you also need to use a single core at lowest
frequency.
On OpenBSD, limiting the CPU frequency is easy:
* stop obsdfreqd if you use it: rcctl stop obsdfreqd && rcctl disable
obsdfreqd
* rcctl enable apmd
* rcctl set apmd flags -L
* rcctl restart apmd
Still on OpenBSD, limiting your system to a single core can be done by
booting on the bsd.sp kernel, which doesn't support multithreading.
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