Alexandre Dpbm

List of Linux networking tools

netstat (ss)

Displays contents of /proc/net files. It works with the Linux Network Subsystem, it will tell you what the status of ports are ie. open, closed, waiting, masquerade connections. It will also display various other things. It has many different options. Netstat (Network Statistic) command display connection info, routing table information etc. To displays routing table information use option as -r.

Sample output:

Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)    
tcp4 0 0 127.0.0.1.62132 127.0.0.1.http ESTABLISHED

Tested on Ubuntu 16.10

Clone the pyside-setup repository and init submodules

git clone https://code.qt.io/pyside/pyside-setup.git
cd pyside-setup
git submodule update --init --recursive

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.

Design rules

Postgres lacks convenient operators for modifying JSON or JSONB values. A common operation one might want to do is to change one property in a JSON column across multiple rows, like:

UPDATE example SET json_col = json_col || '{ "prop": true }'::jsonb WHERE <conditions>;

The || operator is the natural choice for this because it is also used for array and jstore concatenation in Postgres.

This short PLV8 function adds the JSON concatenation operator. It is significantly more powerful than the array and hstore counterparts, and are capable of:

VIM Cheatsheet

Cursor movement

h - move cursor left
j - move cursor down
k - move cursor up
l - move cursor right

w - jump forwards to the start of a word

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BrainFuck Programming Tutorial by: Katie

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INTRODUCTION

deprecated

for_window [class="^.*"] border pixel 1
new_window 1pixel

thanks to deviatorslegacy's comment
Document here: https://i3wm.org/docs/userguide.html#_default_border_style_for_new_windows

	# sudo /sbin/rcvboxdrv -h
	# Unloading modules:
	# Loading modules: modprobe: FATAL: Module vboxnetadp not found in directory /lib/modules/4.4.3-1-ARCH
	# modprobe: FATAL: Module vboxnetflt not found in directory /lib/modules/4.4.3-1-ARCH
	# modprobe: FATAL: Module vboxpci not found in directory /lib/modules/4.4.3-1-ARCH
	# modprobe: FATAL: Module vboxdrv not found in directory /lib/modules/4.4.3-1-ARCH

	# Solution
	# from https://forum.antergos.com/topic/818/can-t-run-my-vitualbox/4

	#!/bin/bash

	export AnException=100
	export AnotherException=101

	# start with a try
	try
	( # open a subshell !!!
	echo "do something"
	[ someErrorCondition ] && throw $AnException

	#include <GL/freeglut.h>

	void desenhaMinhaCena(void)
	{
	glClearColor(1, 1, 1, 1);
	glClear(GL_COLOR_BUFFER_BIT);
	glBegin(GL_TRIANGLE_FAN);
	glVertex3f(-0.5, -0.5, 0.0);
	glVertex3f( 0.5, -0.5, 0.0);
	glVertex3f( 0.5, 0.5, 0.0);