$ ls -lh ./categories

2025-12-30

Finding Empty Directories in Linux with One Command

2025-12-18

Copy a Directory Structure, Transfer Nothing!

2025-11-01

Mistakenly entered a command in terminal in Greek? Auto switch keyboard

2025-10-11

How to use grep to search text in docx files

2025-10-09

Stop Guessing! The Web API That Verifies and Confirms If an Email Address Exists and Is Deliverable

2025-10-07

Stalin Sort: The Sorting Algorithm That Purges Dissent

2025-07-08

Automate Outlook Email Creation on macOS with Body Text and Attachments from Terminal

2025-07-06

Converting Timestamps Between Timezones on Linux

2025-10-31

How to Send and Receive Data with RabbitMQ Named Queues in Python

2025-07-05

Downloading Historical Cryptocurrency Data Using Python and Pandas

2024-10-27

How to Deploy a Flask Application with Gunicorn, Nginx, and SSL

2024-10-06

Determine if Monday’s sales vary significantly from other Mondays using Pandas

2024-10-05

How to Generate Weekly Sinusoidal Data with Random Noise Using Pandas

2024-09-05

Python Bloom Filter: Check String Existence in a Sea of Billions Without the Storage Bloat

2024-08-15

Python: How to interpolate in Pandas

2024-07-22

How to calculate percentage change between values using pandas

2024-08-26

How to make smaller Docker images with upx and multistage builds

2024-07-11

Docker: How do i find the docker-compose.yml file location of a running container?

2024-04-07

Let's build a Customized Visual Studio Code Web Server with Docker

2023-09-04

How to use Redis as docker container

2023-06-18

Docker: syslog logging per container

2023-06-17

Docker: How to configure and use a local docker registry

2023-02-22

Use Postgres DB with Docker.

2023-02-11

How to change the listening port of a Docker container without restarting.

2025-12-15

The Fastest Way to Back Up a File in Bash (You’re Probably Not Using It)

2025-07-16

Oops, I Did It Again — Diffing My Bash Functions to Find My Mistakes

2025-01-05

Linux Storage Testing: Generate Random-Sized Files in Parallel with This Bash Script

2024-11-29

How to Create a ‘Disappearing’ Bash Script

2024-11-23

Identifying Failures in Bash Pipelines

2024-11-05

How to Create a Bash Script That Only Executes from Cron

2024-09-10

Linux: How to colorize text in bash scripts

2024-08-16

Bash: How to manage crontabs remotely

2025-07-02

How to Use Nmap to Scan Subnets for Common Ports

2025-05-20

How to Run a Cron Job Only If a TCP Port Is Open

2024-12-02

Using PowerShell to Check if a Port is Open and export results to an Excel file(Cross-Platform…

2024-10-13

How to minimize SSH connection time using connection multiplexing

2024-08-28

Linux: How to create a ping report with a simple script

2024-03-26

How send data using ping (or how ping can turn evil!)

2022-11-29

Linux: How to port forward only while a process uses a port.

2022-10-13

Netcat: pipe commands over network.

2025-02-06

Which Tool Would Death Use to Track the Departed? Excel, SQL, or NoSQL?

2024-10-09

Converting a Pandas DataFrame to SQL Statements

2024-10-08

SQL: Group Rows By Minute Intervals

2024-10-02

Mastering the SQL LAG Function: Comparing Data Like a Pro

2024-07-05

SQL: powerful tricks with self-joins

2024-06-30

SQL: return a random percentage of rows from a query

2024-06-28

SQL: How to find the diff between two record sets

2024-01-19

Flask: initialize your database with a command line argument!

2024-12-30

Learning Through Real-World Mistakes: Becoming a Better Engineer

2024-12-18

A Beginner’s Guide to Mining Dogecoin on Linux with a CPU

2024-12-01

The IT Specialist’s Guide to Asking Interview Questions (Without Triggering a System Crash)

2023-02-11

How to improve your life

2023-02-05

Top 5 most popular iron maiden songs and their meaning.

2023-01-25

Muse: Resistance

2023-01-23

Metallica: Enter Sandman

2023-01-18

Hey Jude by The Beatles

2025-02-02

Visual Studio Code: How to inherit Shell environment variables

2024-10-27

Nginx log analytics on the command line

2023-09-22

Create your own S3 server using Minio

2023-08-27

Create an ftp server to share files just in one line!

2023-08-20

Nginx monitoring with Monit

2023-06-07

Linux: Create a Samba share

2022-09-21

Linux: parallel SFTP transfers using a simple one-liner.

2022-03-28

Grafana: How to export graphs as images and email them

2025-08-29

How to Maintain an AWS RDS Connection Even After the Token Has Expired

2025-01-02

How to Disable and Re-enable an AWS Lambda Function

2024-12-25

Installing psycopg2 on AWS Lambda When Developing on ARM Macs

2024-12-08

AWS: How to trigger a Lambda function from an S3 event

2024-11-18

How to Restore an Aurora RDS Snapshot Using AWS CLI

2024-11-05

Managing Amazon Aurora RDS Snapshots with AWS CLI

2024-10-30

Managing AWS CLI SSO Accounts: Adding, Listing, and Deleting

2024-09-17

AWS: manage ssh keys from the cli

2025-10-09

Stop Intruders in Their Tracks: Get an Email Every Time Someone Logs In via SSH

2024-12-30

Using Sudoers to Provide Passwordless Sudo Access

2024-06-19

sslscan: Audit the SSL\TLS configuration of your web server

2023-09-27

SUID permission, what is it and why can be dangerous?

2023-06-16

x509 certificate signed by unknown authority error, how to resolve it.

2023-05-15

Linux: disable ssh password login for specific users only

2020-11-16

Hacking sshpass (for a legitimate reason)

2024-03-21

Ansible how to build an inventory the right way

2024-03-20

Ansible configuration files how to use and troubleshoot

2023-01-26

How to configure cronjobs to hundreds of servers in minutes using Ansible!

2021-02-13

Ansible: inventory and configuration tips

2021-02-07

Ansible: ad-hoc commands

2021-02-07

How to start with ansible

2025-01-03

How to Create Food Photos in the Style of Hiroshi Yoda Using MidJourney

2024-12-29

AI and the Art of Humor: A Laugh away from Being Human

2023-01-30

chatgpt: Create fake data for your application and skip learning a library to do t

2023-01-20

How to use chatgpt as command line tool

2023-01-17

chatgpt: Write a simple app using Python

2023-01-15

How chatgpt can be used to hack computers.

2023-02-28

Kubernetes: common pod operations

2023-02-06

Kubernetes: How to Create a deployment

2021-05-04

Introduction to Kubernetes notes

2021-03-30

Kubernetes namespaces

2021-03-29

Create a kubernetes cluster

2021-03-26

Kubernates: An architectural overview

2025-06-12

How to Ignore .log Files in a Git Repository

2023-09-05

Python: How to Properly Configure a Project as a GitHub Repository

2022-07-01

Git: doing common tasks (part 2)

2022-06-26

Git: doing common tasks (part 1)

2020-05-27

Git Useful Commands:

2024-12-07

The Evolution of Mouse Pointers: From the ’70s to the 2020s

2020-10-25

Critical thinking, informations, and decisions.