Otavio Augusto Gomes gmsotavio

Void Linux Cheatsheet

Service

sv up <services>
sv down <services>
sv restart <services>
sv status <services>

Service status

To remove a submodule you need to:

Delete the relevant section from the .gitmodules file.
Stage the .gitmodules changes git add .gitmodules
Delete the relevant section from .git/config.
Run git rm --cached path_to_submodule (no trailing slash).
Run rm -rf .git/modules/path_to_submodule (no trailing slash).
Commit git commit -m "Removed submodule "
Delete the now untracked submodule files rm -rf path_to_submodule

Don't use VPN services.

No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.

Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.

A Russian translation of this article can be found here, contributed by Timur Demin.
A Turkish translation can be found here, contributed by agyild.
There's also this article about VPN services, which is honestly better written (and has more cat pictures!) than my article.

Git Commit Messages Style-Guides

Use the present tense ("Add feature" not "Added feature")
Use the imperative mood ("Move cursor to..." not "Moves cursor to...")
Limit the first line to 72 characters or less
Reference issues and pull requests liberally after the first line
When only changing documentation, include [ci skip] in the commit title
Consider starting the commit message with an applicable emoji

Types

Table Of Content

Skip to the relevant sections if needed.

2-min tutorial to do it the quick-and-dirty-way
Concepts for resolving Git conflicts
Setting up different editors / tool for using git mergetool
- Finding out what mergetool editors are supported
mergetool simple code example for vimdiff
- Resolving conflict from a Git pull
Other great references and tutorials

	import redis
	import time
	import threading

	# Conectando ao servidor Redis
	redis_client = redis.StrictRedis(host='localhost', port=6379, db=0)

	# Função para publicar números sequenciais a cada 100ms

	#### General PFCTL Commands ####
	$ pfctl -d disable # packet-filtering
	$ pfctl -e enable # packet-filtering
	$ pfctl -q # run quiet
	$ pfctl -v -v # run even more verbose
	#### Loading PF Rules ####
	$ pfctl -f /etc/pf.conf # load /etc/pf.conf
	$ pfctl -n -f /etc/pf.conf # parse /etc/pf.conf, but dont load it
	$ pfctl -R -f /etc/pf.conf # load only the FILTER rules
	$ pfctl -N -f /etc/pf.conf # load only the NAT rules

	#!/bin/bash

	# Navigate to the folder containing your PDF files
	cd /path/to/pdfs

	# Create an empty text file to store the list of corrupted PDFs
	corrupted_pdfs="corrupted_pdfs.txt"
	> "$corrupted_pdfs"

	# Loop through all PDF files and check for corruption

	#!/bin/sh

	# This is an attempt at an ipfw config for a cluster with a master node and many
	# compute nodes. The master node is acting as a gateway for the compute nodes
	# in the LAN (192.168.0.0/24).
	#
	# A jail running on one of the compute nodes with address 192.168.0.118 is to be
	# accessible from the outside (using redirect_addr 192.168.0.118
	# 129.173.118.118). The address 129.173.118.118 is an alias for the WAN
	# interface that will only be used to direct traffic to this jail.

	# FreeBSD 10.2 -- /etc/sysctl.conf version 0.47
	# https://calomel.org/freebsd_network_tuning.html
	#
	# low latency is important so we highly recommend that you disable hyper
	# threading on Intel CPUs as it has an unpredictable affect on latency, cpu
	# cache misses and load.
	#
	# These settings are specifically tuned for a "low" latency FIOS (300/300) and
	# gigabit LAN connections. If you have 10gig or 40gig you will need to increase
	# the network buffers as proposed. "man tuning" for more information.