ntrepid8

#!/usr/bin/env bash

LOG_PATH="/home/$(whoami)/log/speedtest.log"

if result=$(/usr/bin/speedtest --simple); then
  parsed_result=$(printf "${result}\"" | sed ':a;N;$!ba;s/\n/" /g' | sed 's/: /="/g')
  printf "[$(date)] ${parsed_result}\n" >> "${LOG_PATH}"
else
  printf "[$(date)] error\n" >> "${LOG_PATH}"
  exit 1

ntrepid8

Ubuntu 22.04 w/luks+btrfs

Notes on installing Ubuntu 22.04 with luks encryption and btrfs.

Based on:

• https://reckoning.dev/blog/ubuntu-btrfs-guide/
• https://mutschler.dev/linux/pop-os-btrfs-22-04/

Post Install

ntrepid8

defmodule GenServerTpl do
  @moduledoc """
  A GenServer template for a "singleton" process.
  """
  use GenServer

  # Initialization
  def start_link(opts \\ []) do
    GenServer.start_link(__MODULE__, opts, [name: __MODULE__])
  end

ntrepid8

Ubuntu 22.04 btrfs home on 2nd drive

Given this crypttab/fstab:

$ cat /etc/crypttab 
nvme0n1p3_crypt UUID=a20b6cb4-c017-43a5-b695-a98fdb230861 /etc/luks/boot_os.keyfile luks,discard
swap_crypt UUID=02fa823d-6779-47ae-b57e-9eb8ba676227 /dev/urandom swap,offset=1024,cipher=aes-xts-plain64,size=512
sda1_crypt UUID=eaaf657d-3526-402e-9580-3d041e888a8d /etc/luks/boot_os.keyfile luks,discard

$ cat /etc/fstab 

ntrepid8

tar xz tips

Compress a directory using multiple threads and show a progress bar with this script:

#!/usr/bin/env bash

# example: tar_cJf.sh ./directory > directory.tar.xz

SOURCE="$1"

ntrepid8

LXC/LXD Notes 2022

An update to my older notes found here:

• https://gist.github.com/ntrepid8/e60a64702c6589d94f845a52e67318e1

See also:

• https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-lxd-on-ubuntu-20-04

Install on Ubuntu 20.04

ntrepid8

LXC/LXD Notes

Some notes on how to install and configure lxc/lxd containers.

Read the 'getting started' docs first:

• https://linuxcontainers.org/lxd/getting-started-cli/

Lots of good examples:

• https://stgraber.org/2016/03/11/lxd-2-0-blog-post-series-012/

ntrepid8

# Input:
#    1. DynDNS style request:
# Input:
# Input:
#    1. DynDNS style request:
#       modulepath = DynDNS
#       queryurl = [Update URL]?[Query Parameters]
#
#    2. Self-defined module:
#       modulepath = /sbin/xxxddns

ntrepid8

[Unit]
Description=AutoSSH reverse tunnel service for jump.you.io 100022 -> 22
After=network.target

[Service]
Environment="AUTOSSH_GATETIME=0"
ExecStart=/usr/bin/autossh -M 0 -o "ExitOnForwardFailure=yes" -o "ServerAliveInterval 30" -o "ServerAliveCountMax 3" -NR 10022:127.0.0.1:22 user@jump.you.io -i /home/root/.ssh/id_rsa

[Install]
WantedBy=multi-user.target

ntrepid8

ssh-rsa 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 jaustin@devcondetect.com