Izzy Mkhwanazi

@izzymk

Linux

JHB , GautengJoined June 2025

About

I am a self taught Linux System Engineer with a strong background in Networking and Radio frequency technologies. I am currently working as a Cloud Support Engineer (Linux) and I love working with Open Source.

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Izzy Mkhwanazi's blogs

Being a Linux Administratorntsacom.hashnode.dev14 posts

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Recently published

IMIzzy Mkhwanazintsacom.hashnode.devJan 16 · 9 min read

Introduction to Amazon ElastiCache SPL-80 - Version 1.6.11

Overview This guide introduces you to Amazon ElastiCache. In this lab you will create an Amazon ElastiCache Redis node and connect to it from an Amazon EC2 instance to run commands. You will then clean up your resources by deleting the stack. Objecti...

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IMIzzy Mkhwanazintsacom.hashnode.devJan 5 · 3 min read

Userdata script not getting executed while launching an instance

Common Causes of UserData Script Failures Script Errors Syntax errors in bash/PowerShell script Missing shebang (#!/bin/bash) at script start Wrong line endings (Windows CRLF vs Unix LF) Script exits early due to set -e with non-zero exit codes ...

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IMIzzy Mkhwanazintsacom.hashnode.devJan 4 · 3 min read

SSL/TLS : what is it and how it works

How SSL/TLS Works SSL/TLS creates an encrypted tunnel between client and server through a handshake process: The Handshake Client Hello: Client sends supported encryption methods Server Hello: Server picks encryption method, sends certificate Cert...

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IMIzzy Mkhwanazintsacom.hashnode.devJan 2 · 4 min read

Elasticache

ElastiCache is AWS's managed in-memory caching service that runs either Redis or Valkey engines. Here's how it works: Core Concept ElastiCache stores frequently accessed data in memory (RAM) instead of disk, providing microsecond response times. App...

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IMIzzy Mkhwanazintsacom.hashnode.devSep 24, 2025 · 4 min read

SUSE Linux Enterprise Server upgrade

Lab Overview This lab provides step-by-step instructions for upgrading SUSE Linux Enterprise Server (SLES) through multiple versions: SLES 12-SP4 → SLES 12-SP5 → SLES 15 → SLES 15-SP3 Prerequisites Access to a SLES 12-SP4 instance Root/sudo privi...

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Izzy Mkhwanazi

About

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Izzy Mkhwanazi's blogs

Recently published

Introduction to Amazon ElastiCache SPL-80 - Version 1.6.11

Userdata script not getting executed while launching an instance

SSL/TLS : what is it and how it works

Elasticache

SUSE Linux Enterprise Server upgrade

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Izzy Mkhwanazi

About

Available for

Izzy Mkhwanazi's blogs

Recently published

Introduction to Amazon ElastiCache SPL-80 - Version 1.6.11

Userdata script not getting executed while launching an instance

SSL/TLS : what is it and how it works

Elasticache

SUSE Linux Enterprise Server upgrade