nightsparc nightsparc

Renew GPG key

Given that your key has expired.

$ gpg --list-keys
$ gpg --edit-key KEYID

Use the expire command to set a new expire date:

C++ : Polymorphic inheritance without vtable

Inheritance and Virtual Table are often used to create interface in C++ polymorphic class
What if ... there were another way to do this ?
easier, cleaner, faster and more reliable
This article explains how to use CRTP, [std::variant](https://en.cppreference.com/w/cpp/utility/variant and std::visit to increase code performance.

Table of content

Introduction

Scenario:

multiple USB devices plugged via hub to a host (Linux OS based),
multiple services/programs interacting with TTY running on top (e.g. GPSd)

Problem:

At boot TTY are randomly assigned to devices causing depending services/programs instabilities. They could indeed fail to start because of different TTY configurations.

Solution:

Introduction

The following describes a way to remote unlock a server with natively-encrypted ZFS-on-root. It uses Dropbear SSH to start a SSH server in the initramfs listing on a specified port.

All server commands are executed as root on Debian 10. For Ubuntu, sudo su or adding sudo to all command should be sufficient.

Requirements

The following requires the recent ZoL 2.x, which adds support to Unlock encrypted root filesystem via SSH, making it merely a no-brainer to unlock the data set (besides setting up Dropbear).

	$ zfs destroy -nv system/usr/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]

	Originall From: Posted 2015-05-29 http://ubwg.net/b/full-list-of-ffmpeg-flags-and-options

	This is the complete list that’s outputted by ffmpeg when running ffmpeg -h full.

	usage: ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}…

	Getting help:
	-h — print basic options
	-h long — print more options
	-h full — print all options (including all format and codec specific options, very long)

	# @brief Helper to read key value pairs
	# @details
	# Read kv in the form <key>=<value>
	# The script cleans whitespaces first and will remove any newlines
	# @see https://stackoverflow.com/a/27918723/1267320
	read_kvp()
	{
	file="$1"
	while IFS="=" read -r key value; do
	# clean whitespaces

	; source: https://gist.github.com/AdrienVR/4136db1bfb0d3d3490b0d1e23e56daf9
	; context: http://superuser.com/a/636973/124606


	#NoEnv
	; Reloard script if not used
	; https://www.autohotkey.com/docs/v2/lib/_SingleInstance.htm
	#SingleInstance force
	; https://www.autohotkey.com/docs/v2/lib/SendMode.htm
	SendMode Input

	See https://www.pragmaticlinux.com/2020/10/start-a-virtualbox-vm-on-boot-with-systemd/