Archive

2025  1

July  1

Ubuntu installation on AtomMan - step-by-step

July 1, 2025 · 3 min · 488 words · sysadmin

2024  41

November  1

Step-by-Step AI Agent Development - From Python to Ansible

November 19, 2024 · 37 min · 7752 words · sysadmin

September  2

Fundamentals of Ansible playbooks

September 30, 2024 · 5 min · 908 words · sysadmin

Disabling the cups-browsed service on multiple systems using Ansible

September 28, 2024 · 5 min · 1025 words · sysadmin

August  1

Getting started with ESP32 in Debian 12 - a step-by-step guide

August 2, 2024 · 4 min · 726 words · sysadmin

June  6

Display Twitch Followers on Ulanzi TC001 - A Step-by-Step Tutorial with Node-RED and Home Assistant

June 28, 2024 · 7 min · 1317 words · sysadmin

Integrating OpenBao Password Manager Vault for Enhanced Secret Management in GitLab

June 27, 2024 · 5 min · 1027 words · sysadmin

Securing Nexus login data retrieval in Dockerfile via HashiCorp Vault

June 18, 2024 · 7 min · 1464 words · sysadmin

Effortless HashiCorp Vault unsealing - a step-by-step guide using systemd services

June 17, 2024 · 9 min · 1915 words · sysadmin

Secure Secrets Management - Using HashiCorp Vault with GitLab CI/CD

June 14, 2024 · 12 min · 2393 words · sysadmin

How to control test triggers in GitLab for your projects

June 9, 2024 · 2 min · 415 words · sysadmin

May  12

Using a Domain Name Instead of IP Address in GitLab Continuous Integration/Continuous Development Pipeline

May 31, 2024 · 8 min · 1666 words · sysadmin

Migrate Jenkins to GitLab

May 30, 2024 · 19 min · 3881 words · sysadmin

Managing Docker Build Arguments and Environment Variables in Jenkins Pipelines

May 25, 2024 · 12 min · 2533 words · sysadmin

Jenkins and Nexus OSS - Managing NPM Authentication

May 24, 2024 · 13 min · 2616 words · sysadmin

Master Multi-Website Test Automation with Jenkins, GitLab, Docker, Taiko, and Gauge

May 22, 2024 · 8 min · 1600 words · sysadmin

Automating Taiko and Gauge Tests Using Jenkins, GitLab and Docker - A Complete Tutorial

May 21, 2024 · 17 min · 3568 words · sysadmin

Nexus Repository Manager on Debian - Installation, Configuration, and Removal

May 15, 2024 · 9 min · 1727 words · sysadmin

Pushing your first Taiko project to GitLab - a detailed walkthrough

May 14, 2024 · 3 min · 526 words · sysadmin

Enhance Your First AWX Test with Gauge and Taiko in Visual Studio Code

May 14, 2024 · 4 min · 726 words · sysadmin

Writing Your First AWX Test from Scratch with Gauge and Taiko in Visual Studio Code

May 12, 2024 · 4 min · 664 words · sysadmin

Exploring the Taiko API for Browser Automated Tests

May 11, 2024 · 3 min · 441 words · sysadmin

Set Up and Run Automated Browser Tests with Taiko and Gauge in Visual Studio Code

May 10, 2024 · 4 min · 739 words · sysadmin

April  1

How to install Arch on an old laptop using one command

April 26, 2024 · 1 min · 142 words · sysadmin

March  5

Setting up and customizing a periodic MQTT message sender using Node-RED in Home Assistant

March 24, 2024 · 4 min · 767 words · sysadmin

A simple guide to the Home Assistant weather forecast displayed on Ulanzi TC001

March 22, 2024 · 5 min · 986 words · sysadmin

Installing, Configuring, and Removing Argo CD with Bash and Ansible

March 19, 2024 · 12 min · 2447 words · sysadmin

Integrating FQDN with AWX and GitLab for enhanced DNS management in Kubernetes cluster

March 18, 2024 · 18 min · 3780 words · sysadmin

Gitlab Integration with AWX - Automating Ansible Playbook Execution

March 7, 2024 · 5 min · 1027 words · sysadmin

February  2

From Zero to Hero - Step-by-Step AWX Configuration and Management

February 29, 2024 · 5 min · 979 words · sysadmin

Persistent Perfection - Mastering AWX Project Storage on Kubernetes

February 24, 2024 · 29 min · 6027 words · sysadmin

January  11

A simple guide to the Node-RED Instagram followers counter displayed on Ulanzi TC001

January 25, 2024 · 4 min · 760 words · sysadmin

Boost Your Focus - A Simple Guide to the Node-RED Pomodoro Timer displayed on Ulanzi TC001

January 21, 2024 · 19 min · 3882 words · sysadmin

How to implement pomodoro timer using Node-RED onto Ulanzi TC001

January 14, 2024 · 4 min · 657 words · sysadmin

NGINX ingress controller for n8n - how to create it and deploy in Kubernetes

January 12, 2024 · 10 min · 1936 words · sysadmin

What is NGINX ingress controller in Kubernetes?

January 9, 2024 · 2 min · 232 words · sysadmin

What is an ingress in Kubernetes?

January 9, 2024 · 1 min · 183 words · sysadmin

What are Port and TargetPort in Kubernetes?

January 9, 2024 · 2 min · 226 words · sysadmin

What is a NodePort in Kubernetes?

January 6, 2024 · 1 min · 97 words · sysadmin

What is a service in Kubernetes?

January 6, 2024 · 2 min · 293 words · sysadmin

What is a pod in Kubernetes?

January 6, 2024 · 1 min · 180 words · sysadmin

What is Kubernetes?

January 6, 2024 · 2 min · 216 words · sysadmin

2023  64

December  10

How to deploy n8n in Kubernetes - k3s

December 29, 2023 · 11 min · 2205 words · sysadmin

How to install n8n and run it during boot thanks systemd unit

December 21, 2023 · 3 min · 566 words · sysadmin

How to fix Rudder error while attempting send and run n8n during boot

December 19, 2023 · 2 min · 253 words · sysadmin

How to install and use n8n to deploy pre-made flows

December 15, 2023 · 1 min · 137 words · sysadmin

How to solve error loading credentials Syntax Error Unexpected token in JSON at position 0 in Node-RED

December 15, 2023 · 1 min · 159 words · sysadmin

How to solve JSON parser error in Node-RED pre-made flow with animations

December 9, 2023 · 1 min · 24 words · sysadmin

Node-RED Installation and Configuration and How to work with pre-made flows

December 9, 2023 · 1 min · 91 words · sysadmin

How to connect Ulanzi TC001 Smart Pixel Clock through MQTT with Home Assistant

December 8, 2023 · 1 min · 98 words · sysadmin

How to flash Ulanzi TC001 Smart Pixel Clock 2882 using AWTRIX flasher by Blueforcer

December 8, 2023 · 2 min · 300 words · sysadmin

Navigating Waves of Change: A Journey Through IT from 2002 to 2023

December 6, 2023 · 3 min · 484 words · sysadmin

November  12

How to install AWX using Ansible playbook

November 27, 2023 · 6 min · 1138 words · sysadmin

How to upgrade Portainer on a remote host using Ansible

November 23, 2023 · 1 min · 211 words · sysadmin

How to install k3s on Raspberry Pi CM4 cluster using Ansible

November 22, 2023 · 2 min · 391 words · sysadmin

How to install Red Hat OpenShift CodeReady Containers in Linux

November 19, 2023 · 2 min · 409 words · sysadmin

Ansible SSH prompt known_hosts issue explained and solved

November 19, 2023 · 2 min · 255 words · sysadmin

What is known_hosts File in Linux

November 14, 2023 · 6 min · 1101 words · sysadmin

How to install and configure ansible, create playbook and run it on remote servers

November 11, 2023 · 1 min · 200 words · sysadmin

How to create elliptic-curve key for ansible user and add it to remote servers using Bash script

November 11, 2023 · 1 min · 151 words · sysadmin

How to add ansible user to sudoers on remote servers using Bash script

November 11, 2023 · 2 min · 297 words · sysadmin

How to add user on remote servers using Bash script

November 11, 2023 · 2 min · 281 words · sysadmin

How to install Rancher using Root CA, intermediate and Rancher server certificate via a Bash script in Debian 12

November 7, 2023 · 1 min · 12 words · sysadmin

How to add another cluster to Rancher using Root CA, intermediate and Rancher server certificate via a Bash script

November 4, 2023 · 1 min · 12 words · sysadmin

October  2

How to add Eurotronic Spirit Z-Wave Plus thermostat into Home Assistant

October 24, 2023 · 1 min · 4 words · sysadmin

How to install Portainer and use it as K3S dashboard in Raspberry Pi CM4

October 5, 2023 · 1 min · 142 words · sysadmin

September  8

Kubernetes pod with hostNetwork: true cannot reach external IPs of services in the same cluster

September 30, 2023 · 4 min · 667 words · sysadmin

How to automate installation of K3S, Helm and Rancher using Bash script

September 28, 2023 · 11 min · 2285 words · sysadmin

How to install K3S and Rancher using Helm and manage Raspberry Pi CM4 cluster

September 28, 2023 · 11 min · 2282 words · sysadmin

How to install rancher and K3S in Raspberry Pi CM4 and manage a cluster

September 8, 2023 · 7 min · 1481 words · sysadmin

Working with vim and YAML files in Kubernetes

September 1, 2023 · 4 min · 842 words · sysadmin

Deleting pods in Kubernetes in Raspberry Pi CM4

September 1, 2023 · 1 min · 142 words · sysadmin

CrashLoopbackOff error in Kubernetes in Raspberry Pi CM4

September 1, 2023 · 2 min · 292 words · sysadmin

Creating pods in Kubernetes in Raspberry Pi CM4

September 1, 2023 · 1 min · 96 words · sysadmin

August  4

How to uninstall k3s and install it on worker nodes

August 30, 2023 · 2 min · 412 words · sysadmin

How to install nginx as ingress controller for k3s

August 20, 2023 · 4 min · 700 words · sysadmin

How to uninstall k3s and install it securely without traefik

August 20, 2023 · 2 min · 336 words · sysadmin

How to connect device through module with relays to Raspberry Pi or CM4 IO board

August 1, 2023 · 7 min · 1450 words · sysadmin

July  11

Connect and configure OLED display in Raspberry Pi or CM4

July 27, 2023 · 8 min · 1592 words · sysadmin

Comparison of PCIe adapters for NVMe drives

July 26, 2023 · 0 min · 0 words · sysadmin

Water cooling case prototype for CM4 board with Compute Module 4 and NVMe SSD

July 23, 2023 · 2 min · 352 words · sysadmin

How to install Raspberry Pi OS onto NVMe drive using M.2 USB-C adapter

July 21, 2023 · 0 min · 0 words · sysadmin

How to clone CM4 eMMC onto NVMe and boot

July 20, 2023 · 4 min · 696 words · sysadmin

How to mount NVMe drive in CM4 board using PCIe adapter

July 18, 2023 · 1 min · 70 words · sysadmin

How to flash Raspberry Pi OS onto the Compute Module 4 eMMC with usbboot

July 16, 2023 · 3 min · 600 words · sysadmin

Water cooling for CM4 board with compute module 4 and NVMe SSD

July 14, 2023 · 1 min · 3 words · sysadmin

Working with Docker containers in Jenkins

July 11, 2023 · 2 min · 353 words · sysadmin

How to create a pipeline with docker container inside Jenkins job

July 11, 2023 · 2 min · 236 words · sysadmin

The Billion Dollar Code

July 6, 2023 · 1 min · 69 words · sysadmin

June  8

Why AGI will not be realized? The Singularity isn’t near. Does our brain use quantum computation?

June 14, 2023 · 5 min · 890 words · sysadmin

How to add Docker as node in Jenkins

June 14, 2023 · 4 min · 662 words · sysadmin

Connect Jenkins and GitLab

June 11, 2023 · 1 min · 195 words · sysadmin

GitLab installation and configuration

June 10, 2023 · 5 min · 935 words · sysadmin

How to connect Jenkins with GitLab and Docker

June 9, 2023 · 3 min · 466 words · sysadmin

How to compile vim from source and use copilot with vim

June 3, 2023 · 1 min · 34 words · sysadmin

How to use copilot in vim

June 1, 2023 · 1 min · 15 words · sysadmin

How to setup copilot in vim

June 1, 2023 · 3 min · 441 words · sysadmin

May  5

Why you cannot access chatGPT

May 31, 2023 · 1 min · 58 words · sysadmin

Innovations in A.I. supercomputer Fugaku, chatGPT & Japaneese. Mojo language faster than Python

May 29, 2023 · 1 min · 78 words · sysadmin

How to use chatGPT and Bing chat in Linux command line

May 28, 2023 · 0 min · 0 words · sysadmin

How to use ChatGPT with the API in the Linux command line interface

May 25, 2023 · 3 min · 527 words · sysadmin

How to install Docker

May 24, 2023 · 4 min · 791 words · sysadmin

April  3

Web Server - Nginx

April 21, 2023 · 2 min · 384 words · admin

Web Server - Apache2

April 6, 2023 · 2 min · 347 words · admin

SSH server

April 1, 2023 · 12 min · 2430 words · sysadmin

March  1

Welcome to the Sysadmin blog

March 19, 2023 · 3 min · 594 words · sysadmin

2022  15

October  8

How to install properly a virtual machine in QEMU KVM

October 25, 2022 · 1 min · 67 words · sysadmin

How to fix QEMU KVM virtual machine network configuration through the xml

October 22, 2022 · 1 min · 26 words · sysadmin

Issue with a type direct in QEMU KVM network configuration explained

October 22, 2022 · 1 min · 20 words · sysadmin

How to install QEMU KVM and configure virtual machine in openSUSE 15.4

October 17, 2022 · 1 min · 12 words · sysadmin

How to setup and configure OpenvSwitch in Debian 11

October 15, 2022 · 1 min · 50 words · sysadmin

How to setup and configure OpenvSwitch in openSUSE 15.4

October 13, 2022 · 1 min · 50 words · sysadmin

Troubleshooting slow network communication or Connection Timeouts in Linux

October 2, 2022 · 1 min · 25 words · sysadmin

Detailed ssh configuration with RSA keys explained.

October 2, 2022 · 1 min · 41 words · sysadmin

September  1

git video course – advanced aspects of configuring the git.

September 22, 2022 · 1 min · 17 words · sysadmin

July  2

How to install Adguard Home as an addon in Home Assistant Supervised

July 29, 2022 · 4 min · 831 words · sysadmin

How to Install Home Assistant Supervised on a Raspberry Pi 4b – the official way

July 29, 2022 · 3 min · 520 words · sysadmin

June  1

Configure the NUT to manage a UPS through the Home Assistant as a Docker container on a Raspberry Pi

June 28, 2022 · 2 min · 379 words · sysadmin

March  3

Agents of chaos

March 21, 2022 · 1 min · 96 words · sysadmin

Create own website in Dark Web

March 3, 2022 · 10 min · 1976 words · sysadmin

Server basic configuration after installing RHEL 8.5 (minimal).

March 3, 2022 · 4 min · 719 words · sysadmin

2021  2

February  2

Bash script that blocks web server (apache/nginx/litespeed) scanners.

February 22, 2021 · 3 min · 636 words · sysadmin

Installation and configuration of auditd

February 14, 2021 · 4 min · 834 words · sysadmin

2020  7

November  1

The perfect weapon

November 14, 2020 · 1 min · 197 words · sysadmin

October  3

logwatch auditd analysis

October 14, 2020 · 8 min · 1554 words · sysadmin

Using blocklist with iptables and firewalld

October 4, 2020 · 19 min · 3910 words · sysadmin

How to Enable Full Strict Encryption in Cloudflare Using Let’s Encrypt

October 3, 2020 · 4 min · 826 words · sysadmin

September  2

The system does not find the root partition, installed on lvm

September 20, 2020 · 2 min · 228 words · sysadmin

How to setup and secure Telegraf, InfluxDB and Grafana on Linux

September 10, 2020 · 18 min · 3674 words · sysadmin

May  1

Full guide for conky with themes, cava and tilda.

May 15, 2020 · 1 min · 9 words · sysadmin

2019  21

December  3

Measuring system i/o

December 23, 2019 · 3 min · 580 words · sysadmin

Linux Resources usage monitoring

December 23, 2019 · 4 min · 647 words · sysadmin

How to change the grey background on lock screen in Elementary OS

December 21, 2019 · 1 min · 26 words · sysadmin

November  6

Access Control List in Linux

November 11, 2019 · 1 min · 17 words · sysadmin

How to Lock and Unlock User in Linux

November 10, 2019 · 1 min · 40 words · sysadmin

Kevin Mitnick talks about security in IT

November 5, 2019 · 1 min · 7 words · sysadmin

The mind behind Linux – Linus Torvalds – TED

November 5, 2019 · 1 min · 9 words · sysadmin

China’s Web Junkies: Internet Addiction Documentary

November 3, 2019 · 1 min · 8 words · sysadmin

Managing special permissions and sticky bit in Linux

November 2, 2019 · 1 min · 8 words · sysadmin

October  6

Mod_security rules for WordPress

October 23, 2019 · 4 min · 745 words · sysadmin

RHCSA – chmod – change file and directory permissions

October 4, 2019 · 1 min · 10 words · sysadmin

RHCSA – User passwords. Add groups and users to groups

October 3, 2019 · 1 min · 45 words · sysadmin

RHCSA – Adding users

October 3, 2019 · 1 min · 40 words · sysadmin

Installation of Red Hat in Virtual Box – network configuration and ssh.

October 2, 2019 · 1 min · 12 words · sysadmin

How to download Red Hat image needed to install the system.

October 2, 2019 · 1 min · 8 words · sysadmin

September  6

RHCSA - Red Hat Certified System Administrator

September 30, 2019 · 2 min · 225 words · sysadmin

fail2ban – installation and configuration

September 28, 2019 · 6 min · 1204 words · sysadmin

rclone – installation and configuration

September 26, 2019 · 5 min · 1005 words · sysadmin

Web server installation on mikr.us using MariaDB and MyISAM engine

September 22, 2019 · 19 min · 3950 words · sysadmin

WordPress configuration for connecting to a remote database

September 22, 2019 · 10 min · 1976 words · sysadmin

SELinux security policy

September 22, 2019 · 5 min · 1037 words · sysadmin