LFCS Tutorials

LFCS tutorials emphasize practical Linux administration and exam-style tasks. Topics span essential shell usage, users and permissions, systemd services, storage, networking, and troubleshooting. Free labs and guided examples help you practice in a safe environment before attempting mock exams and the live performance-based LFCS exam.

Manage Shared Libraries in Linux

Manage Shared Libraries in Linux

In this lab, you will learn to manage shared libraries in Linux. You'll use ldd to identify dependencies, find to locate library files, and ldconfig to view and rebuild the shared library cache, ensuring efficient system performance and resolving dependency issues.

Manage and Monitor Linux Processes

Manage and Monitor Linux Processes

In this lab, you will learn essential skills for managing and monitoring processes on a Linux system. You will explore how to interact with foreground and background processes, inspect them with `ps`, monitor resources with `top`, adjust priority with `renice`, and terminate them with `kill`.

Manage SELinux File Contexts for Apache in Linux

Manage SELinux File Contexts for Apache in Linux

In this lab, you will learn to manage SELinux file contexts for the Apache web server. You'll install Apache, trigger an access denial by using a file with an incorrect context, and then use the chcon command to correct the security label and restore access, building practical troubleshooting skills.

Manage Kernel Modules in Linux

Manage Kernel Modules in Linux

In this lab, you will learn to manage kernel modules in Linux. You'll practice listing, inspecting, unloading, and loading modules using commands like lsmod, modinfo, rmmod, and insmod. You will also configure a module to load automatically at boot, ensuring essential functionality is available.

Edit Text Files in Linux with Vim and Nano

Edit Text Files in Linux with Vim and Nano

In this lab, you will learn the fundamental skills to use two essential text editors in Linux: vi/vim and nano. You will practice creating files, editing text, saving files, and navigating with both editors. This comprehensive introduction covers the most commonly used text editing tools in Linux environments.

Manage IP Addressing in Linux

Manage IP Addressing in Linux

In this lab, you will learn to manage IP addressing in Linux. You'll use the `ip` command to inspect interfaces and configure a static IP, set a default gateway, and then use `dhclient` to obtain a dynamic IP. Finally, you will verify the network configuration with `arp` and `traceroute`.

Manage a Local Git Repository in Linux

Manage a Local Git Repository in Linux

In this lab, you will learn the fundamental commands for managing a local Git repository in a Linux environment. You will practice initializing a repository, configuring user settings, creating and committing files, and reviewing the commit history with `git init`, `git add`, `commit`, and `log`.

Navigate the Filesystem in Linux

Navigate the Filesystem in Linux

In this lab, you will learn the fundamental skills to navigate the Linux filesystem using the command line. You will practice using essential shell commands like pwd, cd, and ls, and explore moving between directories with absolute and relative paths, tilde expansion, and command options.

Connect to a Remote Linux Server Using SSH

Connect to a Remote Linux Server Using SSH

In this lab, you will learn to connect to and manage a remote Linux server using SSH. You will install and configure the OpenSSH server, obtain its IP address, establish an interactive shell session, and execute single commands remotely for scripting and automation.

Managing Packages with RPM in Linux

Managing Packages with RPM in Linux

In this lab, you will learn to manage software on RPM-based Linux distributions using the `rpm` command. Gain hands-on experience querying package info, verifying integrity, listing dependencies, simulating removal, and inspecting RPM package contents with `rpm2cpio` and `cpio`.

Query and Update Packages with YUM in Linux

Query and Update Packages with YUM in Linux

In this lab, you will learn to manage software packages on RHEL-based Linux systems using YUM. You'll inspect installed packages, explore repositories, check for available updates, and apply both single-package and full system updates to keep your environment secure and current.

Analyze Network Ports and Sessions with netstat in Linux

Analyze Network Ports and Sessions with netstat in Linux

In this lab, you will learn how to use the netstat command to analyze network activity on a Linux system. You will explore fundamental concepts such as network ports, sockets, and active connections to gain insight into how services communicate over the network.

Customize the GRUB2 Boot Menu in Linux

Customize the GRUB2 Boot Menu in Linux

In this lab, you will learn to customize the GRUB2 boot menu in Linux. You will modify the primary configuration file, /etc/default/grub, to change the boot menu timeout and default entry, and then apply these changes using the grub2-mkconfig command to alter the boot-up experience.

Identify MAC and IP Addresses in Linux

Identify MAC and IP Addresses in Linux

In this lab, you will learn to use the `ip a` command to identify network addressing information on a Linux system. You will inspect network interfaces like `eth0` to find specific details, including MAC addresses (link/ether), IPv4 addresses (inet), and IPv6 addresses (inet6).

Schedule Tasks with at and cron in Linux

Schedule Tasks with at and cron in Linux

In this lab, you will learn to schedule tasks in Linux using `at` for one-time jobs and `cron` for recurring tasks. You will practice creating, managing, and removing jobs with commands like `at`, `atq`, `atrm`, and `crontab`, gaining hands-on experience in automating system administration tasks.

Create and Activate a Swap File in Linux

Create and Activate a Swap File in Linux

In this lab, you will learn the essential administrative task of creating and activating a swap file in Linux. This process allows you to increase your system's virtual memory when physical RAM is insufficient, using command-line utilities like dd, mkswap, and swapon to manage system resources.

Encrypt and Decrypt Files with GPG in Linux

Encrypt and Decrypt Files with GPG in Linux

In this lab, you will learn to encrypt and decrypt files in Linux using GPG. You'll generate a key pair, encrypt/decrypt files, exchange and sign public keys, and perform key maintenance like backups and creating revocation certificates to secure your data and communications.

CybersecurityLinux

System Information and Process Management

System Information and Process Management

Learn to identify a Linux system, interpret load, inspect processes, find PIDs, send signals, control terminal jobs, use exit status, and run detached work.

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