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Journalctl Cheat Sheet

Configuration

Permissions

To see messages from other users and the system as well as performing various log operations from a regular user add it to the group:

sudo usermod -aG systemd-journal $USER

Setting up Jellyfin and Chromecast using Docker, Nginx, and dnsmasq

1/03/2023

Requirements
Guide Specific Requirements
Installing Docker
Installing Jellyfin and Nginx
Set up our DNS server
Block Chromecast's hardcoded DNS server

Make Ubuntu packages 90% faster by rebuilding them

TL;DR

You can take the same source code package that Ubuntu uses to build jq, compile it again, and realize 90% better performance.

Setting

I use jq for processing GeoJSON files and other open data offered in JSON format. Today I am working with a 500MB GeoJSON file that contains the Alameda County Assessor's parcel map. I want to run a query that prints the city for every parcel worth more than a threshold amount. The program is

	#!/usr/bin/python3
	# -- coding: utf-8 --

	from PyQt5.QtCore import Qt
	from PyQt5.QtGui import QImage, QPixmap, QPalette, QPainter
	from PyQt5.QtPrintSupport import QPrintDialog, QPrinter
	from PyQt5.QtWidgets import QLabel, QSizePolicy, QScrollArea, QMessageBox, QMainWindow, QMenu, QAction, \
	qApp, QFileDialog

	package main

	import (
	"image"
	"image/color"
	"image/png"
	"os"
	)

	import torch, grp, pwd, os, subprocess
	devices = []
	try:
	print("\n\nChecking ROCM support...")
	result = subprocess.run(['rocminfo'], stdout=subprocess.PIPE)
	cmd_str = result.stdout.decode('utf-8')
	cmd_split = cmd_str.split('Agent ')
	for part in cmd_split:
	item_single = part[0:1]
	item_double = part[0:2]