Articles
Notes on IT operations, infrastructure, automation and things I break (and fix) along the way.
Cisco IOS Access Modes and Essential Commands
Learn how to access Cisco IOS, move between command modes, inspect a device, and save configuration changes safely.
Cisco IOS Device and Interface Configuration
Apply basic Cisco device identity, management access, and interface settings, then verify the result before saving it.
Cisco IOS SSH, Routing, VLANs, and Troubleshooting
Secure Cisco management with SSH, configure basic routing and VLANs, and use a repeatable connectivity troubleshooting process.
Containerfiles with Alpine, Apache, and PHP
Build a repeatable web image with a Containerfile, explain each instruction, and verify the resulting Apache/PHP container.
IPv4 Subnets, Netmasks, and CIDR
Calculate IPv4 network ranges, usable hosts, and broadcast addresses using netmasks and CIDR notation.
Linux Users, Groups, and Permissions
Understand Linux identities and permission bits, then safely inspect and change ownership and access on files and directories.
Linux Filesystem Navigation and Command-Line Help
Learn how Linux paths, directories, and built-in command documentation fit together, with practical commands for exploring a system safely.
Linux FTP with VSFTPD and TLS
Configure a restricted VSFTPD service with TLS for a controlled lab, and understand why plain FTP should not be used on untrusted networks.
Linux Network Configuration with Netplan
Configure DHCP and static IPv4 networking on Ubuntu with Netplan, then verify addresses, routes, and name resolution.
Linux Packages, Processes, and System Inspection
Install software, inspect hardware and processes, and read system information without guessing what is running on a Linux host.
Linux Shell Pipelines, Redirection, and Archives
Compose Linux commands with pipes and redirection, then create, inspect, and transfer archives safely.
Linux SSH and Secure File Transfer
Set up and troubleshoot SSH access using keys, least privilege, and secure file transfer with scp.
Podman Images, Commit, Export, and Import
Capture and transfer Podman images while understanding the difference between an image archive and a container filesystem archive.
Installing Podman and Understanding Containers
Install Podman, distinguish images from containers, and run a first rootless container with safe inspection and cleanup habits.
Podman Kubernetes YAML and Minikube
Generate Kubernetes YAML from a Podman pod, inspect the result, and deploy a small local workload with a version-aware Minikube workflow.
Podman Multi-Container Web and Database Stacks
Connect Apache/PHP and MariaDB containers on a named Podman network, using persistent data and service names instead of container IPs.
Podman Networks and Container Connectivity
Create isolated Podman networks, connect services by name, and troubleshoot container connectivity without hard-coded IP addresses.
Podman phpMyAdmin and Database Verification
Add phpMyAdmin to a private Podman network and verify MariaDB schema and application connectivity without exposing the database unnecessarily.
Podman Pods and WordPress
Run WordPress and MariaDB in a Podman pod, use shared localhost networking correctly, and keep database data persistent.
Podman Volumes and Web Containers
Run an Apache container with a bind mount and published port, while keeping website content outside the disposable container layer.