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How to Resolve iptables: No chain/target/match by that name

Introduction If you encounter such error, it means that the CONFIG_NETFILTER module was not complied in your kernel. All VPS (virtual private server) that I owned from DigitalOcean, AWS, Google Cloud and other lesser-known host providers have it by default...

Asus Router Setup – Wifi Settings

Introduction The RT-AX55 is not on sales in many local computer stores and is only available through one of the local broadband providers (M1), which happens to be my current Internet provider. It has four external antennas - 2.4 GHz 2 x...

Create Helpdesk Ticketing System with Google Apps Script

Introduction When a business expands with increased headcounts, there will be more incoming IT helpdesk requests from its employees. There will always be this period of time where the single IT staff will have to answer phone calls, reply to...

Host Multiple Websites with jwilder nginx-proxy and letsencrypt-companion

Introduction Two years ago, in 2018, I was introduced to Docker by a colleague of mine who was a brilliant programmer. Thus, I started my Docker journey on my own by reading tutorials online. I was developing a WordPress website...

Change Domain for WordPress Docker Container with phpMyAdmin

Are you trying to migrate an existing WordPress Docker container to a new domain URL? One might change domain for a couple of reasons. For example, change in brand name, favorite domain in .com becomes available or change to different...

Email Verification using Laravel Fortify

Introduction It was my first attempt to use Laravel email verification to build an online web application and I shortlisted Fortify for account authentication as it provides register new and login pages out of the box. These two pages were...

Config Examples for liximomo SFTP Sync Extension – VS Code

Introduction Visual Studio Code is one of the most popular code editors these days. There are many plugins (also known as extensions) developed for Visual Studio Code in the marketplace and I am going to introduce a must-have extension for...

Sihoo M57 Ergonomic Office Chair Assembly and Review

Introduction Widescreen desktop monitor with 144Hz refresh rate, RGB computer cases, mechanical keyboard, and branded gaming mice. Most of us are upgrading and following the Internet trend for the ultimate computing or gaming experience. It is more prominent since COVID-19,...

Ragnarok X: Next Generation

Introduction Two weeks ago, I came across a Ragnarok X advertisement on my mobile. It was the #1 top-grossing game in the Google Play store, and the release date was recent on 18th June 2021. I visited the website and...

How to Backup WordPress Database and Directory Docker Containers

In this tutorial, I am going to show you how to backup Docker containers for services WordPress and MySQL in a docker-compose.yml file. If you read enough backup articles like me, you will find that some articles relate to just...
Feng Shui for Living Room using Bagua Map

Feng Shui for Living Room using Bagua Map

Posted by By Mike Goh January 8, 2023Posted inDaily Rants and Excitement BlogTags: Family, FunNo Comments
Introduction Do you believe in feng shui? Feng shui also known as Chinese geomancy is a practice which uses energy (chi) to harmonize individuals with their surroundings. Before my wife and I moved into our new home, we asked a…
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Create a High Availability Setup – HetrixTools, PagerDuty, Python, Cloudflare

Create a High Availability Setup – HetrixTools, PagerDuty, Python, Cloudflare

Posted by By Mike Goh October 31, 2022Posted inDevelopers Technical TutorialsTags: Backup, ServersNo Comments
Introduction This tutorial will cover three things: Webhooks in Python with Flask, integrating PagerDuty with HetrixTools monitoring service, and using the Cloudflare DNS API with the⁣ cURL command. Python is one of the top programming languages for developers, and we…
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MindsDB – Machine Learning with MySQL Tables Using PHP

MindsDB – Machine Learning with MySQL Tables Using PHP

Posted by By Mike Goh October 10, 2022Posted inDevelopers Technical TutorialsTags: Coding, SoftwareNo Comments
Introduction Machine learning has been around for a long time, and the emphasis on making sense of data was a selling point for many small and medium businesses. My first blush with machine learning was when I was assigned the…
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Set Up Chef Infra Server, Workstation, Bootstrap Node and Create Cookbook

Set Up Chef Infra Server, Workstation, Bootstrap Node and Create Cookbook

Posted by By Mike Goh August 30, 2022Posted inDevelopers Technical TutorialsTags: DevOps, ServersNo Comments
Introduction Chef is an infrastructure as code (IAC) automation tool used to configure downstream clients known as nodes. This is one of the many configuration management tools used in DevOps among Ansible and Puppet. There are currently more jobs requiring…
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Install Splunk on Linux with Trial to Free License

Install Splunk on Linux with Trial to Free License

Posted by By Mike Goh August 13, 2022Posted inDevelopers Technical TutorialsTags: DevOps, SoftwareNo Comments
Introduction I have heard of Splunk - a log analysis tool but having worked in the IT industry for last 15 years, I never had to work with it. However, one of my new job requirement as a Site Reliability…
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Set Up SFTP Chroot Jail using OpenSSH

Set Up SFTP Chroot Jail using OpenSSH

Posted by By Mike Goh July 29, 2022Posted inDevelopers Technical TutorialsTags: Command Line, SecurityNo Comments
Introduction You may want to use one of your existing servers as a SFTP server without subscribing to another EC2 instance. Or you would like to have multiple SFTP users/vendors on a single SFTP server to save on resources and…
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ASUS ZenWiFi (XD4) AiMesh with RT-AX55 WiFi Router

ASUS ZenWiFi (XD4) AiMesh with RT-AX55 WiFi Router

Posted by By Mike Goh July 12, 2022Posted inSoftware and Web Services ReviewsTags: NetworkNo Comments
Introduction Home mesh Wi-Fi system has been around for a few years. Mesh system does not come cheap; they range from $100 for 1-unit to $300 for a 3-unit pack. AiMesh is a router feature that is present in ASUS…
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Terraform: Deploy Application Load Balancer on AWS

Terraform: Deploy Application Load Balancer on AWS

Posted by By Mike Goh June 21, 2022Posted inDevelopers Technical TutorialsTags: Cloud, Coding, DevOpsNo Comments
Introduction In the first Infrastructure as Code (IaC) tutorial using Terraform, we explored how to install the CLI and launch an EC2 instance with external input variables. The Terraform CLI version was v0.12.29 then, but the latest version at the…
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Troubleshoot and Fix Windows Problems

Troubleshoot and Fix Windows Problems

Posted by By Mike Goh April 18, 2022Posted inDevelopers Technical TutorialsTags: ServersNo Comments
Introduction I have encountered various Windows problems and had to troubleshoot them while working as a system administrator dealing with Active Directory, Print server, and Level 1 support for end-user laptops. Some fixes are worth noting down because they are…
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DevOps Tools – Troubleshooting Guide

DevOps Tools – Troubleshooting Guide

Posted by By Mike Goh March 28, 2022Posted inDevelopers Technical TutorialsTags: DevOps, DockerNo Comments
Topic Jenkins, From Zero To Hero Become a DevOps Jenkins Master Sourcejenkins/centos7/DockerfileErrorStep 2/7 : RUN yum -y install openssh-server---> Running in 7e18f84a2754CentOS Linux 8 - AppStream 391 B/s | 38 B 00:00Error: Failed to download metadata for repo 'appstream': Cannot…
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