Axel Werner's OPEN SOURCE Knowledge Base

How i would install Ubuntu server 20.04 LTS with bridged interfaces?

Anonymous (anonymous@undisclosed.example.com) — 2022-11-02T15:47:03+00:00

How i would install Ubuntu server 20.04 LTS with bridged interfaces? FIXME FIXME FIXME work in progress STUFF TO READ: * * FIXME FIXME FIXME Szenario / User requirements: This is the network how i like to have it: * [X] are Hosts/Devices

Formatting Syntax

Anonymous (anonymous@undisclosed.example.com) — 2024-05-12T13:48:45+00:00

Formatting Syntax DokuWiki supports some simple markup language, which tries to make the datafiles to be as readable as possible. This page contains all possible syntax you may use when editing the pages. Simply have a look at the source of this page by pressing

Proxmox 7 Installation and Configuration with two network interfaces

Anonymous (anonymous@undisclosed.example.com) — 2023-08-05T14:01:26+00:00

Proxmox 7 Installation and Configuration with two network interfaces Network Scenario : This page show the installation notes for a two network interfaced Proxmox 7 virtualisation server. This is my network scenario we are going to work on: {LAN 192.168.0.0/24} || +==========================+ | [LAN IF 192.168.0.250] | | ProxMox 7 Host | | pve.lan | | [DMZ IF 192.168.178.250] | +==========================+ || {DMZ…

How to install and configure Docker on UBUNTU Server 20.04 (and similar)

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to install and configure Docker on UBUNTU Server 20.04 (and similar) One can find “manuals” and “how to”s for this topic everywhere, but there is always something important missing and thus you'll have to do further search and puzzle everything together. I'm not saying that my manual here is ever complete, but at least from an administrators standpoint it hopefully covers more than the average docker page on the interwebs to prevent Docker from going haywire and pulling down your host. Sinc…

English Song Lyrics - Herbert Groenemeyer - Hold me (Halt mich)

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T11:16:16+00:00

English Song Lyrics - Herbert Groenemeyer - Hold me (Halt mich) “” HOLD ME (Halt mich) take dreams for hard cash indulge in fantasies have cought myself in you dont know whats happening to me warming to youre voice resting in your arms hold me just a little while till i fall asleep - feeling secure with you betting my heart on you want to cherish every moment for all eternity its good to lean against you and youve got happiness in excess to you i yield submissively and find solace in you. - i…

learning python3 - frameIt.py - command line tool to frame text on the console

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

learning python3 - frameIt.py - command line tool to frame text on the console These are my first steps in python programming language. The result is a little cli tool/function/library (whatever you call it ) that will encapsulate any given text within a

Repairing a faulty 80s Power Supply 13.8V/3A from CONRAD Elektronik, Germany

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T11:16:16+00:00

Repairing a faulty 80s Power Supply 13.8V/3A from CONRAD Elektronik, Germany CONRAD Elektronics is possibly Germanys largest and certainly the most popular Electronic Parts Reseller. Some time in the 1980s i bought a stabilized 13.8V, 3A (5A) DC Power Supply that served my needs for decades now. Lately i accidentally dropped it to the floor and after re-checking it, it seems to send out pretty much

Automatisches Backup (RSYNC) mit Hot Plug SATA bzw USB Festplatten als Sicherungsmedium

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

Automatisches Backup (RSYNC) mit Hot Plug SATA bzw USB Festplatten als Sicherungsmedium Festplatten und sonstige Speicher werden schnell immer größer und damit wird es auch immer schwieriger regelmässig eine gute , schnelle und vollsständige Datensicherung aller wichtigen Daten anzufertigen. Magnetband, CD und DVDs sind inzw. oft schon wie zu klein, zu teuer und zu unpraktisch um damit die heutigen gigantischen Datenmengen zu sichern. Da hilft oft nur noch eine Backup-to-Disk Datensicherung.…

How to enable audio normalization a.k.a. audio compression a.k.a. audio dynamic range compression under Debian Linux with pipewire

Anonymous (anonymous@undisclosed.example.com) — 2026-01-19T13:27:14+00:00

How to enable audio normalization a.k.a. audio compression a.k.a. audio dynamic range compression under Debian Linux with pipewire Under Windows its been around for many years already, installed by default and included pretty much with every sound driver. The user would just need to click a checkbox to enable it. With Linux it isn't that easy yet and most people are not even aware of it. But Linux offers a vast variety of messing with the audio path and signals in real time. Way more and better…

How to join or connect UBUNTU Desktop 18.10 Workstation to an Active Directory (AD) Domain, including automatic mounting of CIFS (SMB) shares and home directory

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to join or connect UBUNTU Desktop 18.10 Workstation to an Active Directory (AD) Domain, including automatic mounting of CIFS (SMB) shares and home directory This page describes the results of a small 3 day workshop i threw with a former colleague on how to set up an UBUNTU Desktop 18.10 Workstation that connects to an existing (SAMBA 4 based) Active Directory domain, so that users can use their AD user accounts to graphically logon and have their cifs (or smb) shares and (windows) home dire…

How to make an Ubuntu or Debian apt repository locally available as an emergency offline fallback

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to make an Ubuntu or Debian apt repository locally available as an emergency offline fallback Maybe you never had that problem yourself, but there may be reasons why someone want to have one or multiple Ubuntu or Debian online repositories available on your local network. Maybe because you throw an Linux installation party and dozens of times the same repos and files are been pulled over a thin DSL connection. Or you want your own local mirror in case your internet connection goes down. Or …

How to use a (usb) floppy drive to backup and restore double density (dd) and high density (hd) disk images using Linux for vintage roland synthesizers, samplers or music keyboards

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to use a (usb) floppy drive to backup and restore double density (dd) and high density (hd) disk images using Linux for vintage roland synthesizers, samplers or music keyboards Old vintage synthesizer keyboards, samplers and other musical devices often used 3.5

DokuWiki

Anonymous (anonymous@undisclosed.example.com) — 2022-09-15T10:58:38+00:00

DokuWiki wiki:dokuwiki DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database. It is loved by users for its clean and readable Formatting Syntax. The ease of maintenance, backup and integration makes it an administrator's favorite. Built in

My Reaction / Research on julian's investigates how slow is arduino youtube video

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

My Reaction / Research on julian's investigates how slow is arduino youtube video After i have seen Julian's YouTube Video ( ) on Arduino Microcontrollers i was courious about if the Arduino is really that slow and so i wanted to test it myself, trying out multiple methods to switch on and of a single pin on the arduino as fast as we can. This Page summarizes my results and shows the oscilloscope (scope) Screenshots and code that i have made and used.

CAVE cloning VMs of UBUNTU 20.04 Server or Desktop can result in networking problems. Same IP address in every cloned VM, even if MAC address has been changed

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

CAVE cloning VMs of UBUNTU 20.04 Server or Desktop can result in networking problems. Same IP address in every cloned VM, even if MAC address has been changed Problem: Using virtualisation (VMs) like Virtualbox, KVM etc, people sometimes “clone”

How to enable pc speaker on UBUNTU 20.04 to make your server audible without additional hardware

Anonymous (anonymous@undisclosed.example.com) — 2022-10-30T16:43:26+00:00

How to enable pc speaker on UBUNTU 20.04 to make your server audible without additional hardware Maybe you run a physical Linux server somewhere under a desk or somewhere in your small office / home office which still contains spinning platters ( hard disks ) or any other hardware that

How to install Oracle Virtualbox 7 on Linux Mint 21 with automatic updates?

Anonymous (anonymous@undisclosed.example.com) — 2024-01-06T11:16:54+00:00

How to install Oracle Virtualbox 7 on Linux Mint 21 with automatic updates? For some strange reason Oracle Virtualbox 7 is still not available through the Mint Repos in early 2024. And for some even more strange reasons Oracle themselves offer their own Debian/Ubuntu/Mint online (apt) repository, but seem NOT to make sure that people are using this method, so that users will receive future updates to the packages automatically. Oracle provides all the information for that, but it's unnecessaril…

How to shrink transcode cleanup misc video files using handBrake handBrakeCLI

Anonymous (anonymous@undisclosed.example.com) — 2025-11-21T17:57:56+00:00

How to shrink transcode cleanup misc video files using handBrake handBrakeCLI By the power of LINUX the FlatPak Version or “Handbrake” includes the “CLI” Version “HandbrakeCLI” as well! That said it is way faster to do batch work like that.

Improve your MPV experience by adding a trash-and-skip key binding workflow

Anonymous (anonymous@undisclosed.example.com) — 2026-01-25T22:58:14+00:00

Improve your MPV experience by adding a trash-and-skip key binding workflow I know #Kodi ! I love #VLC ! But since i learned to know #MPV is LIVE it! Looks like nothing, but is everything one could ever want. However the default configuration really needs some personal touch to make it work for me.

Meine IT Artikel

Anonymous (anonymous@undisclosed.example.com) — 2026-02-12T17:01:42+00:00

Meine IT Artikel Linux * How to convert and stabilize Panasonic SDR-H20 video files to h265 mkv using ffmpeg * Improve your MPV experience by adding a trash-and-skip key binding workflow * SAMBA - Einige nützliche NET Kommandos... * mutt goes Maildir/ - Wie man mutt für Maildir konfiguriert * Link Speed und Link Modus einer Ethernet Schnittstelle einstellen mit ethtool * Screen - Fenster Manager und Multifunktions-Werkzeug für die Text-Konsole * Systemweites AUTOLOGOUT für ROOT…

CS106A BouncingBall Sample Code Phenomenon - Ball bounces forever?

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

CS106A BouncingBall Sample Code Phenomenon - Ball bounces forever? This is the “BouncingBall” Sample Code for Computer Science Course CS106A of Prof. Mehran Sahami by the STANFORD University. Testing the Code on my computer with some changes at the parameters (class vars) turned out to show some STRANGE PHENOMENON. The ball seems not to come to rest. In fact, at the end you can easily see that it sometimes

Learning Java - DoWhileDemo_WarGames_LoginDemo

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

Learning Java - DoWhileDemo_WarGames_LoginDemo Just some little code demonstrating a do_while loop in java and some simple graphical userinterface prompting for input. Inspired by my favorite Hacker Movie of all times - “WarGames”. import javax.swing.JOptionPane; public class DoWhileDemo_WarGames_Login { public static void main(String[] args) { String command; boolean isWrongCommand; int errorCounter=0; do{ command = JOptionPane.showInputDialog("LOGIN: "); if(command.equals("…

My first real Java project - flashySquare V.1.0

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

My first real Java project - flashySquare V.1.0 This was my first self initiated Java Project from the scratch for training purposes. It requires the acm library which you can download from . It shows a simple rectangle and changes (fades) it from one color to another random color. Just like you might know it from some Microcontroller RGB LED Projects.

My Solution on Assignment 1 - Problem 4

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

My Solution on Assignment 1 - Problem 4 This is my Solution of Assignment 1 - Problem 4 from the Computer Science Course CS106A of Prof. Mehran Sahami at the STANFORD University. /* * File: MidpointFindingKarel.java * ------------------------------- * When you finish writing it, the MidpointFindingKarel class should * leave a beeper on the corner closest to the center of 1st Street * (or either of the two central corners if 1st Street has an even * number of corners). Karel can put do…

My Solution on Assignment 2 - Problem 2

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

My Solution on Assignment 2 - Problem 2 This is my Solution of Assignment 2 - Problem 2 from the Computer Science Course CS106A of Prof. Mehran Sahami at the STANFORD University. /* * File: Target.java * Name: * Section Leader: * ----------------- * This file is the starter file for the Target problem. * Assignment 2 , Problem 2 */ import acm.graphics.*; import acm.program.*; import java.awt.*; import javax.swing.plaf.synth.ColorType; public class Target extends GraphicsProgram {…

My Solution on Assignment 2 - Problem 6

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

My Solution on Assignment 2 - Problem 6 This is my Solution of Assignment 2 - Problem 6 from the Computer Science Course CS106A of Prof. Mehran Sahami at the STANFORD University. /* * File: Hailstone.java * Name: Axel Werner * Section Leader: * -------------------- * This file is the starter file for the Hailstone problem. */ import acm.program.*; /** * Class to ask User for a integer start number to * calculate Hailstone Numbers sequence. * @author Axel Werner */ public class …

My Solution on CS106A - Section 20 - Problem 3 - Random Circles

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

My Solution on CS106A - Section 20 - Problem 3 - Random Circles This is my Solution on CS106A - Section 20 - Problem 3 - Random Circles from the Computer Science Course CS106A of Prof. Mehran Sahami at the STANFORD University. Question: On some runs of this program you might not see ten circles. Why? My Answer: Since there is no special controlling on where to place new circles on the canvas it is possible that it puts a new larger circle on top of an older smaller circle, covering the older…

My Solution on CS106A - Section 20 - Problem 4 - Drawing Lines

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

My Solution on CS106A - Section 20 - Problem 4 - Drawing Lines This is my Solution on CS106A - Section 20 - Problem 4 - Drawing Lines from the Computer Science Course CS106A of Prof. Mehran Sahami at the STANFORD University. My Code: /* * File: DrawLines.java * ------------------- * Name: Axel Werner [mail@awerner.myhome-server.de] * Section Leader: * * CS106A - Section 20 - Problem 4 - Draw Lines * * Write a GraphicsProgram that allows the user to * draw lines on the canvas. Pr…

How to add more system information and color to your virtual terminals and shells with "screenfetch"

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to add more system information and color to your virtual terminals and shells with "screenfetch" You might have seen screenfetch or similar tools like bginfo (winblows only) before. But how to install them so that they provide constant use to every user on a system. Here is how i did it for my virtual consoles (text based pre login environment). Thanks to cron it runs every minute and updates the

Automatische Datensicherung der lokalen LDAP Datenbank anfertigen

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

Automatische Datensicherung der lokalen LDAP Datenbank anfertigen Das ist nur ein Beispiel wie man mit wenig Aufwand sich die lokalen LDAP (OpenLDAP) Daten (komplette Datenbank) automatisiert wegsichern kann. Es sichert die LDAP Daten auf ZWEI WEGEN. Der erste Weg bedient sich dem reinen LDAP Protokoll und versucht so viele Daten wie möglich abzusaugen. Operational Attribute werden auf diesem Wege jedoch nicht ausgegeben. Daher halte ich diese Methode nicht für sehr Sinnvoll. Allerdings wurde …

cd/dvd Massen import script - automatisiert massenweise cd/dvds importieren bzw auf platte kopieren

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

cd/dvd Massen import script - automatisiert massenweise cd/dvds importieren bzw auf platte kopieren Schonmal eine Datensicherung auf CD oder DVD bestehend aus mehreren duzend Disks zurückspielen müssen? Oder die gesamte Bilder- oder Musik-Sammlung CD für CD? Das ist ganz schön langwierig und man macht doch nur immer wieder die gleichen Handgriffe. Warum also nicht so weit wie möglich automatisieren? Darum habe ich mir eben schnell dieses kleine Script geschrieben dass mir die Arbeit dabei etwas…

CUPS - Common Unix Printing System

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

CUPS - Common Unix Printing System CUPS ist das zur Zeit aktuelle von Apple weiterentwickelte Printing System für Linux. Es unterstützt lokale (usb, lpt usw) sowie Netzwerkdrucker (lpr, ipp, socket/raw). Drucker bzw Queues können per Webinterface (

EXPERIMENTAL HA Kubernetes Cluster for SOHO use on UBUNTU + k3sup + k3s base

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

EXPERIMENTAL HA Kubernetes Cluster for SOHO use on UBUNTU + k3sup + k3s base Project Goal: * self hosted HA fault tolerant (multi master) Kubernetes Cluster * NO SINGLE POINT OF FAILURE! * no “external” managed Services required (no separate database/load balancer)

How to achieve easy automatic deployment of Centos7 as VirtualBox VM in a dynamic DNS LAN environment with an Ansible playbook

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to achieve easy automatic deployment of Centos7 as VirtualBox VM in a dynamic DNS LAN environment with an Ansible playbook PLEASE NOTE:“”“” Scenario / Environment: * Have an internet connected LAN with a local DHCP and “dynamic DNS”

How to create a self signed or official ssl tls certificate without questions asked (non-interactive) on the command line interface

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to create a self signed or official ssl tls certificate without questions asked (non-interactive) on the command line interface Goal: * create a x509 server certificate for use in TLS (ssl) * self signed (not official, not trusted by default)

How to enable audio normalization a.k.a. audio compression a.k.a. audio dynamic range compression under Linux? (pulse audio)

Anonymous (anonymous@undisclosed.example.com) — 2026-02-08T07:05:18+00:00

How to enable audio normalization a.k.a. audio compression a.k.a. audio dynamic range compression under Linux? (pulse audio) NOTE / UPDATE : :!: Meanwhile i managed to achieve the same result on Linux Distros with PipeWire , using SWH's LV2 and/or LADSPA plugins. See my articles about pipewire on this website.

How to enable audio normalization a.k.a. audio compression a.k.a. audio dynamic range compression under Rocky Linux 9 with pipewire

Anonymous (anonymous@undisclosed.example.com) — 2026-02-07T14:16:32+00:00

How to enable audio normalization a.k.a. audio compression a.k.a. audio dynamic range compression under Rocky Linux 9 with pipewire Under Windows its been around for many years already, installed by default and included pretty much with every sound driver. The user would just need to click a checkbox to enable it. With Linux it isn't that easy yet and most people are not even aware of it. But Linux offers a vast variety of messing with the audio path and signals in real time. Way more and bette…

How to enable free updates to proxmox, the free open source vmware killer, without a costly subscription

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to enable free updates to proxmox, the free open source vmware killer, without a costly subscription ProxMox is an open source, free Linux Distro, that gives you enterprise grade VMWARE virtualisation features either free of charge. The product itself is free. The support isnt free. If you want to run proxmox in your enterprise and want it to be backed up with enterprise grade support, consider a subscription!

How to find files by separate keywords real quick using 'locate' instead of 'find'?

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to find files by separate keywords real quick using 'locate' instead of 'find'? If you have lots and lots if files accumulated over the decades , more or less organized, you sometimes need to find a file real quick. you might know some sort of keyword or partial filename , but cant remember where its located at. There you could go for some

How to install gtop (graphical top) an advanced text UI system monitor on Ubuntu 18.04 or similar

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to install gtop (graphical top) an advanced text UI system monitor on Ubuntu 18.04 or similar top, atop, iotop etc are all very good and well known system monitoring tools which run perfectly via simple terminal sessions (no X server or mouse required). But sometimes you would prefer some graphical representation added to it. Some graphs. There comes

How to limit users to update or upgrade installed packages on their UBUNTU 20.04 installation but not allow installing packages using sudo and aptitude

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to limit users to update or upgrade installed packages on their UBUNTU 20.04 installation but not allow installing packages using sudo and aptitude By default on UBUNTU/DEBIAN users require membership in “adm” or “sudo” groups, to gain the right to use sudo freely. However there are many situations where you want regular users to be able to update and upgrade their system any time, even without using a password every time. For example:

How to upgrade Ubuntu Linux 16.04 LTS, 16.10 or 17.04 to Ubuntu 18.04 LTS inplace

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

How to upgrade Ubuntu Linux 16.04 LTS, 16.10 or 17.04 to Ubuntu 18.04 LTS inplace To upgrade Ubuntu you often dont need to do a fresh install of it. You can try an inplace upgrade instead with only a few easy steps. :!::!::!: However its highly recommended that you first BACKUP ALL YOUR DATA AND CONFIGURATION FILES

nscd - Oder warum neue Benutzergruppen oder Gruppenmitgliedschaften nicht sofort sichtbar sind

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

nscd - Oder warum neue Benutzergruppen oder Gruppenmitgliedschaften nicht sofort sichtbar sind Ich laufe meines Linux LDAP/SAMBA Projektes musste ich mehrfach feststellen das es vorkommen kann dass das Betriebsystem eine neu angelegte Benutzergruppe oder eine neue Gruppenmitgliedschaft nicht sofort anzeigt. Es kann mit unter bis zu 1h dauern bis die Änderung sichtbar wird. Ursache hierfür scheint der Name Service Caching Daemon kurz NSCD zu sein. Dieser

shellscript - automatically fix wrong filename extensions - fix-filename-extension.sh

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

shellscript - automatically fix wrong filename extensions - fix-filename-extension.sh Its a little weird topic. But when you have to deal a lot with “non IT people” throwing around lots of files like photos and/or archive files and they mix up each and every file format and filename extensions, it quickly can get messy. This shell script is a early attempt to quickly and easily find these

STATA 12 on 64Bit SLES 11 sp1 - libgtksourceview-1.0.so.0: cannot open shared object file

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:30:19+00:00

STATA 12 on 64Bit SLES 11 sp1 - libgtksourceview-1.0.so.0: cannot open shared object file Today i tried to install STATA12 Statistics Software on a SuSE Linux Enterprise Server (SLES) 11 sp1 64bit and stumbled over an error message that some library is yet not found: