Mahdad Ghasemian MahdadGhasemian

Download Postman from: Postman x86_64
Extract it:

tar -xzf ./postman-linux-x64.tar.gz

Move to /opt

Secure External SSD

Make your external SSD partitions with ext4 filesystem for Linux

To prepare your external SSD for use in Linux, you can use the following tools:

Use lsblk or fdisk -l to identify your external SSD device.
Use fdisk or parted to create and manage partitions on the SSD.
Use mkfs.ext4 to format the created partitions with the ext4 filesystem.
For a graphical interface, consider using gparted.

VMware

✅ You can run VMs on your PC/Mac for free

VMware Workstation & VMware Fusion (Desktop Hypervisors)
Workstation for Windows/Linux and Fusion for macOS
These desktop virtualization products are now free for all users — personal, educational, and even commercial.
The older Pro branded versions are no longer sold as paid products; instead these full-featured tools are available at no cost.
No subscription or license purchase required
Official support is not included — only community forums and docs.

MetalLB: Layer 2 vs BGP Mode Comparison

🎯 Introduction

MetalLB is a load-balancer implementation for bare metal Kubernetes clusters. This document compares its two main operational modes: Layer 2 and BGP, helping you choose the right one for your environment.

🔁 Layer 2 Mode

🏗️ Example Cluster Setup

📦 Cluster Setup

How to Set Up a stable MongoDB Replica Set Localy for Developing

version: "3.9"

services:
  mongodb-primary:
    image: docker.io/bitnami/mongodb:5.0
    environment:
      - MONGODB_ADVERTISED_HOSTNAME=mongodb-primary

1. bash behind proxy:

Edit .profile file (with vi or nano)

nano .profile

And add following lines:

export http_proxy=http://127.0.0.1:8888/
export https_proxy=http://127.0.0.1:8888/

Restore Backup with Minio (Minio <----> Local)

Instructions for restoring buckets using Minio mirror features.

Install Minio Client

Install Link install link

Restore Backup with Longhorn

Instructions for restoring data using Longhorn backup and restore features.

Restore Backup

Example: Restoring PostgreSQL Data

Scale Down the PostgreSQL StatefulSet:

This guide will help you determine the available disk space on a Hetzner volume assigned to a K3S node.

1- Find Volume ID

Using hcloud CLI:

Run the following command to list your volumes:

hcloud volume list

	version: "3.7"

	services:
	# Node 0
	redis-node-0:
	image: docker.io/bitnami/redis-cluster:7.4
	volumes:
	- redis_cluster_data_0:/bitnami/redis/data
	environment:
	- "REDIS_PASSWORD=bitnami"