Axel Werner's OPEN SOURCE Knowledge Base

Meine IT Artikel

Anonymous (anonymous@undisclosed.example.com) — 2026-05-14T11:21:59+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…

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 configure or add a static IPv6 address to your IPv4 Ubuntu Server with bridged interfaces?

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

How to configure or add a static IPv6 address to your IPv4 Ubuntu Server with bridged interfaces? I ran a UBUNTU Server 14.04/16.04 LTS on a computer on a small SOHO as an router/firewall, using two network interfaces. One is towards the internet, one for internal (

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

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 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 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…

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

Screenshots erstellen und direkt bearbeiten mit Shutter unter Ubuntu 16.04 (Alternative zu greenshot und hardcopy unter Windows)

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

Screenshots erstellen und direkt bearbeiten mit Shutter unter Ubuntu 16.04 (Alternative zu greenshot und hardcopy unter Windows) Ubuntu bringt schon seit mehreren Jahren von Hause aus ein ganz einfaches Screenshot Tool mit, welches per Default an die Standard-Tastenkombinationen wie

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…

BASH - Tipps und Tricks

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

BASH - Tipps und Tricks Brace Expansion / Klammern Expansion Klammern Expansion kann einem das Leben leichter machen. Beispiele: * Anlegen mehrerer “gleicher” Verzeichniss-Bäume mkdir -p {ebene1dir1,ebene1dir2}/{sub1,sub2,sub3} Legt folgende Verzeichniss-Struktur an:

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”

Fehlende man pages manuell hinzufügen/installieren

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

Fehlende man pages manuell hinzufügen/installieren Musste Heute feststellen das bei neueren Linux Distributionen manchmal bei bestimmten Programmen keine “man pages” mehr mitgeliefert werden, was vieleicht von ein paar Jahren jedoch noch der Fall war.

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…

Proxmox 8 How to check and report zpool zraid status automatically

Anonymous (anonymous@undisclosed.example.com) — 2025-04-26T16:44:16+00:00

Proxmox 8 How to check and report zpool zraid status automatically This is NOT Proxmox exclusive and will most likely work on any Debian based Linux distro using openZFS for zpools/raid that has been peoperly configured for sending SMTP Email. * Prerequisits:

A Solution on Assignment 2 - Problem 3

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

A Solution on Assignment 2 - Problem 3 This is “a” Solution of Assignment 2 - Problem 3 from the Computer Science Course CS106A of Prof. Mehran Sahami at the STANFORD University. In fact, i cant realy tell anymore if I wrote this code or if i found it somewhere on the internet :). It looks pretty much like programm code i usualy make. But will not claim that this is MY Code. Just a Code that solves the Problem as requested for example purposes.

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

My Solution on Assignment 2 - Problem 4

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

My Solution on Assignment 2 - Problem 4 This is my Solution of Assignment 2 - Problem 4 from the Computer Science Course CS106A of Prof. Mehran Sahami at the STANFORD University. /* * File: PythagoreanTheorem.java * Name: Axel Werner * Section Leader: * ----------------------------- * This file is the starter file for the PythagoreanTheorem problem. */ import acm.program.*; public class PythagoreanTheorem extends ConsoleProgram { public void run() { println("PythagoreanTheorem : …

My Solution on Assignment 2 - Problem 5

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

My Solution on Assignment 2 - Problem 5 This is my Solution of Assignment 2 - Problem 5 from the Computer Science Course CS106A of Prof. Mehran Sahami at the STANFORD University. /* * File: FindRange.java * Name: Axel Werner * Section Leader: * -------------------- * This file is the starter file for the FindRange problem. */ import acm.program.*; public class FindRange extends ConsoleProgram { /** * Main Program to requests a list of integers from the user * to determine an…

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…

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 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 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 update BIOS firmware for Toshiba Tecra A2 (maybe others as well) within Linux

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

How to update BIOS firmware for Toshiba Tecra A2 (maybe others as well) within Linux I have got an ancient ca 2003/2004 Toshiba business notebook with some 32bit, NO PAE, 1 core, Pentium M (centrino?) CPU , 1GB RAM, 40GB PATA HDD, WiFi, DVD writer with a dead battery. Beside that its in pretty good shape. Comes with a DB25 parallel port, PCMCIA Slot, 2 USB (v2?) Ports. So if it would run a somewhat recent Linux it would be still an awesome nice tool for simple tasks where power consumption is n…

Linux Filesystem ACLs und Kommandozeilen Tools

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

Linux Filesystem ACLs und Kommandozeilen Tools Ein SUPER Tutorial zum Thema Linux ACLs in englischer Sprache ist z.b. . ACHTUNG: FALLSTRICKE Ändern der User und Gruppenberechtigungen ändert die MASK Im Dokument ist es nur unzureichend Dokumentiert. Aber es wurde festgestellt dass das Ändern von User und Gruppenberechtigungen (Unix Owner User und Unix Owner Gruppe) mit Hilfe des

Massenhaft Dateinamen bereinigen bzw umbenennen auf der Kommandozeile mit rename und regex

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

Massenhaft Dateinamen bereinigen bzw umbenennen auf der Kommandozeile mit rename und regex Wer kennt das nicht, wenn man eine gewisse Zeit alle möglichen Dateien von verschiedenen Quellen in einem Verzeichnis sammelt, so sehen die Dateinamen alle oft unterschiedlich aus und enthalten zudem alle möglichen Sonderzeichen bzw Trennzeichen. z.B. sowas

mutt goes Maildir/ - Wie man mutt für Maildir konfiguriert

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

mutt goes Maildir/ - Wie man mutt für Maildir konfiguriert mutt - der eMail-Client für die Text-Console ist ein echtes Multitalent! mutt kann sogar problemlos mit dem Maildir Format umgehen welches von vielen imap Servern wie Courier und Dovecot verwendet wird. Dieser Artikel zeigt Ihnen wie Sie ihren mutt dafür einstellen können.

Wie kann innerhalb einer VMWARE Console auf eine Linux Text-Console umschalten wenn CTRL-ALT-F1 nicht funktioniert?

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

Wie kann innerhalb einer VMWARE Console auf eine Linux Text-Console umschalten wenn CTRL-ALT-F1 nicht funktioniert? Wenn man an üblicherweise an einer Linux Maschine mit grafischer Oberfläche CTRL+ALT+F1 (Fx) drückt schaltet man normalerweise auf eine von mehreren TEXT-CONSOLEN um. Versucht man das jedoch bei einer virtuellen Maschine (VM) unter VMWARE ESXi (vsphere und ähnlichem) so funktioniert das nicht, weil dort die Tastenkombination CTRL+ALT eine Sonderfunktion hat um die Maus- Tastatur-F…

Cut & Paste und alt+tab für XMING X Server einschalten

Anonymous (anonymous@undisclosed.example.com) — 2024-01-30T12:26:18+00:00

Cut & Paste und alt+tab für XMING X Server einschalten Die Profis kennen bereits die praktischen Tastenkombinationen unter Windows wie STRG+C (Ausschneiden/Cut), STRG+V (Einfügen/Paste) sowie ALT+TAB (offene Fenster um- bzw durchblättern) etc. Doch was tun wenn Sie per XMING auf einen Linux-Desktop zugreifen? Dort funktionieren diese Tasten nicht. Jedenfalls NOCH NICHT. Dieser Artikel zeigt Ihnen wie Sie diese Tastenkombinationen auch unter XMING nutzbar machen können.

Kommandozeile unter Windows 7/Vista DIREKT als Administrator ausführen

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

Kommandozeile unter Windows 7/Vista DIREKT als Administrator ausführen Es ist möglich unter Windows 7/Vista und evtl auch noch unter Windows 8 eine Kommandozeile (CLI) DIREKT, also ohne Umwege und ohne das der aktuell angemeldete Benutzer Administrator-Rechte haben muss, als Administrator, also mit