jfeilbach

Ubuntu 22.04 Annoyances

Here are a few collected ways I like to customize Ubuntu 22.04 servers. I used to love Ubuntu, but I hate auto updates and snaps. They also put ads and other usless ads diguised as "news" in MOTD. ESM FUD is spread throughout the OS including simple apt functions. You do not need ESM and thus Ubuntu 22.04 has become super annoying. unattended-upgrade is an automatic installation of security (and other) upgrades without user intervention. Consider the ramifications of disabling this service.

Disable unattended upgrades

The Unattended Upgrades feature is enabled by default and it runs at system boot without the user's permission. The configuration is stored in /etc/apt/apt.conf.d/20auto-upgrades

Disable: sudo dpkg-reconfigure unattended-upgrades then a TUI will come up, select "No"

This will not permantently disable the function. After an update it will be enabled. In the file /etc/apt/apt.conf.d/20auto-upgrades change these values from 1 to 0. Even doing this it will

jfeilbach

TCP tuning

The most important TCP tuning areas since kernel 4.9 are:

• packet pacing
• dynamic TSO sizing
• TCP small queues
• BBR TCP congestion algorithm

Definitions

• Gb = gigabit

jfeilbach

In /etc/default/grub, modify:

noibrs noibpb nopti nospectre_v2 nospectre_v1 l1tf=off nospec_store_bypass_disable no_stf_barrier mds=off tsx=on tsx_async_abort=off mitigations=off 

Then sudo update-grub

from https:// make-linux-fast-again.com/ This domain does not seem to be maintained any longer.

jfeilbach

<?xml version="1.0" encoding="utf-8"?>
<Client name="tvOS">
  <!-- Author: Plex Inc. -->
  <!-- This profile is used by A10X-based tvOS (Apple TV 4K) devices using the MPV ("experimental") video player. Currently, this requires a Plex Pass subscription. -->
  <!-- Because Plex does not currently support TrueHD or DTS-MA playback in the client, this audio is transcoded to FLAC. -->  
  <Settings>
    <Setting name="DirectPlayStreamSelection" value="true" />
    <Setting name="StreamUnselectedIncompatibleAudioStreams" value="true" />
  </Settings>
  <TranscodeTargets>

jfeilbach

Bluey Season 2

Fixing Bluey Season 2 to conform to the TVDB order. This fixes the giant mess displayed in Plex. Otherwise titles, descriptions. and other metadata will not match to the correct file.

Reorder

Move the incorrect episode number to the correct episode number temporarily. This avoids overwriting needed files.

mv -v Bluey\ \(2018\).S02E01.Dance\ Mode.WEBDL-1080p.h264.EAC3.mkv Bluey\ \(2018\).S02E02.Hammerbarn.WEBDL-1080p.h264.EAC3.mkv-tmp
mv -v Bluey\ \(2018\).S02E02.Hammerbarn.WEBDL-1080p.h264.EAC3.mkv 'Bluey (2018).S02E03.Featherwand.WEBDL-1080p.h264.EAC3.mkv-tmp'
mv -v Bluey\ \(2018\).S02E03.Featherwand.WEBDL-1080p.h264.EAC3.mkv Bluey\ \(2018\).S02E01.Dance\ Mode.WEBDL-1080p.h264.EAC3.mkv-tmp
mv -v Bluey\ \(2018\).S02E05.Hairdressers.WEBDL-1080p.h264.EAC3.mkv Bluey\ \(2018\).S02E11.Charades.WEBDL-1080p.h264.EAC3.mkv-tmp

jfeilbach

# Configuring DNS-over-TLS on macOS
# Worked on macOS 10.13.4
brew -v update
brew -v doctor
# Next two commands are optional
sudo chown -R $(whoami) $(brew --prefix)/*
echo 'export PATH="/usr/local/sbin:$PATH"' >> ~/.bash_profile
# Install DNS client
brew install knot-resolver
# Should be installed to something like: /usr/local/Cellar/knot-resolver/2.3.0/sbin/kresd

jfeilbach

#!/bin/bash

host=<>
name=transmission-openvpn
log=transmission-openvpn.log
echo "Stopping ${name}"
/usr/bin/docker stop ${name}
echo "Removing ${name}"
/usr/bin/docker rm ${name}

jfeilbach

RHEL

Should work on Amazon Linux as well

needs-restarting -r ; echo $?

or

needs-restarting -r || shutdown -r

or

#!/bin/bash

jfeilbach

tail log file to web via netcat

Server side

sudo yum install nc -y && (echo -e ‘HTTP/1.1 200 OK\nAccess-Control-Allow-Origin: *\nContent-type: text/event-stream\n’ && tail -f /var/log/squid/access.log | grep 10.120.13.31| sed -u -e ‘s/^/data: /;s/$/\n/’) | nc -l 8000

Client browser

new EventSource("http://${server}:8000/").onmessage = function(e) {
  console.log(e.data);
};

jfeilbach

#!/bin/bash
SECONDS=0
RED='\033[0;31m'
WHITE='\033[1;37m'
CYAN='\033[0;36m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

list=''