Guides library

Guides

All practical SysLab content, organized by category. Each guide includes real examples and code blocks ready to copy.

🐧 Linux

Commands, permissions, users and everything you need to handle a Linux system from the terminal.

Linux

Basic Linux commands to get started

Navigation, files, system info and search.

 Linux

Permissions and ownership (chmod, chown)

How to read and change permissions with examples.

 Linux

User and group management

useradd, usermod, groupadd and sudo explained.

See all Linux guides →

🌐 Networking

IP addresses, subnets, DNS and the fundamentals behind any network.

Networking

IP addresses and subnet masks

How networks are divided, explained with examples.

 Networking

Configure and check DNS

dig, nslookup and how to change DNS server.

See all Networking guides →

🔐 Cybersecurity

Tools and practices to understand and reduce risk in systems and networks.

Cybersecurity

Introduction to Nmap

Host and port scanning, used responsibly.

 Cybersecurity

Basic hardening of a Linux server

Updates, secure SSH and firewall.

See all Cybersecurity guides →

🖥️ Servers

Installation, configuration and maintenance of services on Linux servers.

Servers

Install and configure Apache on Ubuntu Server

Installation, virtual hosts and firewall.

 Servers

Backups with rsync

Local, remote and automated backups with cron.

See all Servers guides →