G.Grandes ggrandes

Install TrueNAS SCALE on a partition instead of the full disk

The TrueNAS installer doesn't have a way to use anything less than the full device. This is usually a waste of resources when installing to a modern NVMe which is usually several hundred of GB. TrueNAS SCALE will use only a few GB for its system files so installing to a 16GB partition would be helpful.

The easiest way to solve this is to modify the installer script before starting the installation process.

This will configure QEMU to expose a tmp105 temperature sensor on the i2c-0 bus on x86_64. The temterature sensor can have its temperature set from the host OS, and the temperature can be read from the Linux client OS using the lm75 kernel module.

Building QEMU

For convenience, we will be emulating an x86 system. The x86 configuations which QEMU ships with do not contain the tmp105 sensor we will be using, so first we need to enable it.

Assuming you have the qemu sources in the qemu directory:

# cd qemu

echo "CONFIG_TMP105=y" >> default-configs/i386-softmmu.mak

Let's Destroy C

I have a pet project I work on, every now and then. CNoEvil.

The concept is simple enough.

What if, for a moment, we forgot all the rules we know. That we ignore every good idea, and accept all the terrible ones. That nothing is off limits. Can we turn C into a new language? Can we do what Lisp and Forth let the over-eager programmer do, but in C?

How to disable systemd-resolved in Ubuntu

Stages

Disable and stop the systemd-resolved service:

  sudo systemctl disable systemd-resolved.service
  sudo systemctl stop systemd-resolved

Then put the following line in the [main] section of your /etc/NetworkManager/NetworkManager.conf:

Screen Quick Reference

Basic

Description	Command
Start a new session with session name	`screen -S <session_name>`
List running sessions / screens	`screen -ls`
Attach to a running session	`screen -x`
Attach to a running session with name	`screen -r <session_name>`

Crear un instalador de java

Estructura de archivos:

Carpeta [NombreApp] carpeta raíz.
- Carpeta app contiene todos los archivos de la aplicación.
  - Carpeta bin/jre1.8.0_161 contiene el JDK de Java
- Carpeta res contiene todos los recursos.
  - Carpeta Output contiene el futuro instalador.
  - Archivo launch4j.manifest archivo manifiesto de launch4j.

Archivo Setup.iss Configuración del programa Inno setup.

Notas tomadas durante el #SOSZ18

	/*
	* This file is an MPU6050 demonstration.
	* https://openest.io/en/2020/01/21/mpu6050-accelerometer-on-raspberry-pi/
	* Copyright (c) 2020 Julien Grossholtz - https://openest.io.
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, version 3.
	*
	* This program is distributed in the hope that it will be useful, but

	import datetime
	from telethon import TelegramClient

	api_id = 123456789
	api_hash = 'abcdef123456789'

	client = TelegramClient('session_name', api_id, api_hash)
	client.session.report_errors = True
	client.start()

	# Custom history configuration
	# Run script using:
	# chmod u+x better_history.sh
	# sudo su
	# ./better_history.sh

	echo ">>> Starting"
	echo ">>> Loading configuration into /etc/bash.bashrc"
	echo "HISTTIMEFORMAT='%F %T '" >> /etc/bash.bashrc
	echo 'HISTFILESIZE=-1' >> /etc/bash.bashrc