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:

Every so often I have to restore my gpg keys and I'm never sure how best to do it. So, I've spent some time playing around with the various ways to export/import (backup/restore) keys.

Method 1

Backup the public and secret keyrings and trust database

cp ~/.gnupg/pubring.gpg /path/to/backups/
cp ~/.gnupg/secring.gpg /path/to/backups/
cp ~/.gnupg/trustdb.gpg /path/to/backups/

or, instead of backing up trustdb...

Add a bridge interface to Ubuntu desktop using nmcli

Had to do this for some advanced networking with KVM, and couldn't figure out how to do it using the Nework Manager gui. Did find an article later that showed how to do it with nmtui, but it's so much easier to record what you did when using the cli.

Note: I now set net.ifnames=0 in grub for all my machines, to ensure my device names are "predictable" (so the first ethernet device will be "eth0" and not "ens1", "eno1 or anything else).

To see what everything looks like before starting:

	$ 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)

	; 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

	# nvidia-settings: X configuration file generated by nvidia-settings
	# nvidia-settings: version 270.29 (buildd@roseapple) Fri Feb 25 14:43:24 UTC 2011

	Section "ServerLayout"
	Identifier "Layout0"
	Screen 0 "Screen0" 1680 0
	Screen 1 "Screen1" LeftOf "Screen0"
	InputDevice "Keyboard0" "CoreKeyboard"
	InputDevice "Mouse0" "CorePointer"
	Option "Xinerama" "1"