Level 1
CompTIA Linux+ Level 1 foundation articles for entry-level technicians.
Linux networking basics IP subnet routing and DNS
Learn how IP addressing, subnet masks, routing decisions, and DNS lookups work on Linux, plus a practical...
Linux filesystem layout (FHS) for beginners
Learn how Linux FHS directories map to real operations, with practical examples for troubleshooting, backups, and safe...
Linux ecosystem and Level 1 roadmap
A beginner-friendly map of Linux layers and a practical Level 1 path, with cross-distro commands and compatibility...
Linux boot process BIOS UEFI GRUB and systemd
Learn the Linux boot chain from firmware to systemd, with practical commands and troubleshooting steps for Debian 13.3,...
Kernel modules and hardware detection basics
Understand how Linux kernel modules map hardware IDs to drivers, how to troubleshoot missing devices, and what changes...
Firewall management with nftables and firewalld
Learn when to manage Linux firewall rules directly with nftables and when to use firewalld, with safe commands, distro...
find locate and which practical guide
Learn when to use which, find, and locate on real Linux systems, with safe command patterns, indexing caveats, and...
Disk health and capacity monitoring with df du and smartctl
Learn a practical workflow to track Linux disk capacity with df and du, verify hardware health with smartctl, and...
Containers and virtualization basics with Podman and KVM
Learn when to use Podman containers or KVM virtual machines, with rootless Podman and libvirt setup steps plus...
Configure network interfaces with NetworkManager and CLI tools
Configure Linux network interfaces safely with nmcli and ip tools, including static IP setup, temporary testing,...
Build a safe Linux lab with VMs and snapshots
Learn to build an isolated Linux practice lab with KVM VMs and snapshots, including rollback routines, network...
Build and install software from source safely
Learn a safe source-build workflow: verify tarballs, compile in a controlled environment, stage installs, and keep...