Taylor High laivial

Setup nut and netdata on Ubuntu

In this document, I will explain how to setup nut (Network UPS Tools) on Ubuntu 18.04 and 20.04.

It is basically the next chapter of my previous gist, Upgrade nut on Ubuntu 18.04.

I'll only document USB connected UPS and not the other supported connection modes.

Install required dependencies

If you have a Linux machine with KVM on it, you can manage those VMs remotely from a Mac using virt-manager.

Step 1: Allow your user non-root access to KVM

SSH to the Linux machine and add your SSH user to the libvirt group

sudo usermod -a -G libvirt $(whoami)

Problem: Controlling a remote Mac desktop using a tool like Barrier or Synergy doesn't allow for trackpad gestures to be sent to the client machine.

Solution: Use Better Touch Tool on host machine to handle the gestures and send a remote command to the client machine.

Steps to setup:

[1] On the CLIENT machine in BTT setup these Named triggers:

Running into this error message when trying to run a mosh server on macOS Catalina? The steps below should solve the problem which is most likely either a $PATH and/or firewall issues.

command not found: mosh-server
Connection to X.X.X.X closed.
/usr/local/bin/mosh: Did not find mosh server startup message. (Have you installed mosh on your server?)

1. Install Mosh

Blog 2020/5/7

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QEMU PowerPC G4 OS X Tiger (10.4) setup

EDIT 2024/12/1: I updated a few of these commands to work with qemu 9.x.

Note: superceded by https://gitlab.wikimedia.org/mhurd/mediawiki-docker-make

I'm using this page to document experimentation with the new docker bits in Mediawiki core.

How to download, install and run a basic MediaWiki instance, from scratch, using Docker, and wire up PHPStorm debugging

These instructions are intended for someone who has no previous MediaWiki experience, who is interested in getting a basic instance of MediaWiki running on their local machine.

Random "Freezing" with AMD Ryzen CPUs

It seems that numerous GNU/Linux users (including myself) have been having issues with the system randomly "freezing" during light usage. From journalctl output and anecdotal accounts, it is speculated that the AMD Ryzen CPUs do not support other C-states for power management very well (at least on GNU/Linux distributions), and the freezing may be resolved by limiting the C-state of the CPU.

Possible Solution

Limiting the C-state of the CPU can be done through the addition of the following kernel boot parameter.

processor.max_cstate=1

	# Clone llama.cpp
	git clone https://github.com/ggerganov/llama.cpp.git
	cd llama.cpp

	# Build it
	make clean
	LLAMA_METAL=1 make

	# Download model
	export MODEL=llama-2-13b-chat.ggmlv3.q4_0.bin

	#!/usr/bin/env python
	# -- coding: utf-8 --

	import argparse
	import logging
	import math
	import os
	import statistics
	import signal
	import sys

	# Install Ubiquiti Unifi Controller on Ubuntu 20.04.
	# As tested on a fresh install of ubuntu-20.04.1-live-server, August 22nd 2020.
	# Thanks to https://gist.github.com/tmuncks for posting the updated install steps.

	sudo apt update
	sudo apt install --yes apt-transport-https

	echo 'deb https://www.ui.com/downloads/unifi/debian stable ubiquiti' \| sudo tee /etc/apt/sources.list.d/100-ubnt-unifi.list
	sudo wget -O /etc/apt/trusted.gpg.d/unifi-repo.gpg https://dl.ui.com/unifi/unifi-repo.gpg