Jacek Wieczorek Jacajack

#Group	Package name	Description
	sudo	running programs as root
	ssh	remote shell
	sshfs	for mapping filesystems over network
	pv	program for measuring data flow through pipes
	git	version control system
	moreutils	more utilities
	rsync	for making backups and copying files
	tree	file tree view
	rename	powerful renaming utility

Cool commands I keep forgetting about

pandoc file.md -t beamer -o out.pdf - create beamer presentation from markdown file
nm - list symbols from object file
sending file with Xmodem (requires lrzsz):
- screen /dev/tty* 115200
- Ctrl + A, :exec !! sx file.txt
sudo getty -L 115200 ttyUSB0 vt102 - terminal over serial line (persistent)
objdump -D -b binary -mi386 -Maddr16,data16 -Mintel file.bin - disassemble raw 16-bit i386 binary file with Intel syntax
ffmpeg ... -vcodec hevc_nvenc/h264_nvenc - use Nvidia GPU for video encoding with ffmpeg
echo "file.txt" | entr command - run command each time file changes

Warnings:

Debugging:

-g - Preserve debugging symbols
-fno-omit-frame-pointer - if some symbols remain broken
-fno-builtin - Do not perform some printf, scanf, malloc, etc. optimizations (debugging is easier)
-fsanitize=address - Use address sanitizer
-fsanitize=thread - Use thread sanitizer
-fsanitize=undefined - Use UB sanitizer

	/*
	Compile with: clang -O3 -o nsect nsect.c -Wall -DCOUNT=5000000 -DNSECT=? -funroll-loops
	*/

	#include <math.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <assert.h>
	#include <sys/time.h>

	# liblightmodbus - a lightweight, multiplatform Modbus library
	# Copyright (C) 2017 Jacek Wieczorek <[email protected]>

	# This file is part of liblightmodbus.

	# Liblightmodbus 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, either version 3 of the License, or
	# (at your option) any later version.

	struct iir_filter
	{
	float *w; // w coefficients
	float *a; // a coefficients
	float *b; // b coefficients
	int n; // filter size
	};

	float iir_push( struct iir_filter *f, float x )
	{

	#!/bin/bash

	BLOCK="gambling porn fakenews social"
	EXCEPT=""

	cp hosts hosts.new

	# Base
	echo "blocking adware + malware..."
	curl -s "https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts" \| sed -ne '/# Start StevenBlack/,$p' >> hosts.new

	#include "url_request.hpp"
	#include <algorithm>
	#include <stdexcept>

	// The write callback function
	size_t url_request::write_callback( void contents, size_t size, size_t nmemb, void userp )
	{
	size_t realsize = size * nmemb;
	url_request rq = static_cast<url_request>( userp );
	std::uint8_t b = static_cast<std::uint8_t>( contents );