Course Overview

This course is designed for individuals seeking hands-on experience in Linux system management. It offers practical insights into various aspects of Linux administration, catering to both beginners and those with some prior knowledge. Through step-by-step examples, you will gain expertise in essential administrative tasks such as system startup, disk management, network setup, security, troubleshooting, and user management. 

This course begins with tips and tricks to optimize your workflow, followed by a detailed exploration of the system startup, covering runlevels, targets, and process management in both init and systemd environments. You will dive into disk management, learning how to create and resize volume groups and logical volumes using LVM and manage virtual disks. The network and security chapters address configurations like static IP setup, DNS settings, and firewall management. You will also explore network and system troubleshooting tools, such as ping, traceroute, and log analysis. Finally, topics like NFS setup and user management tasks like adding users and managing quotas are covered. 

By the end of this course, you will be equipped with practical skills for effectively managing and troubleshooting Linux systems in real-world environments.

What You Will Learn

  • Perform many of the daily tasks of a Linux system administrator.
  • Control the boot process
  • deal with disk space
  • configure the network and troubleshoot issues.
  • Topics covered apply to many distributions (Debian
  • Ubuntu
  • CentOS
  • RedHat
  • Fedora
  • etc)

Program Curriculum

Tips & Tricks

  • Introduction
  • Understanding the runlevels and Targets
  • Current and Default runlevel
  • Default runlevel Ubuntu - init
  • Listing Services in Certain runlevels
  • Enable/Disable a Process from Starting at boot - init
  • Default Target - systemd
  • Dealing with Processes - systemd
  • Chapter 2 Quiz

  • What is LVM?
  • Steps on How to Create a Volume Group
  • Steps on How to Extend an Existing Volume Group
  • Steps on How to Decrease Disk Space by Reducing the Volume Group
  • Add Virtual Disk in VMware Workstation Player
  • Add Virtual Disk in Oracle VM VirtualBox
  • Create Volume Group and Logical Volume
  • Extend Existing Volume Group and Logical Volume
  • Reduce Logical Volume
  • Resize Filesystem and Logical Volume
  • Chapter 3 Quiz

  • Introduction
  • Change the Hostname
  • DNS nameservers
  • Resolve Queries Locally with /etc/hosts
  • Determine the Order for DNS Queries
  • Setup a Static IP Debian/Ubuntu
  • Setup alias ip
  • ip vs. ifconfig Commands
  • Adding Routes
  • Network Configuration for CentOS/RHEL
  • Connect Remotely with SSH
  • Servers Fingerprints
  • Setup Firewalls with iptables
  • Iptables-persistent
  • Chapter 4 Quiz

  • Introduction
  • Ping Command
  • What Happens Behind the ping Command?
  • Traceroute Command
  • Netstat & ss Commands
  • Capturing Network Traffic with tcpdump
  • Deciphering the Output of tcpdump
  • Chapter 5 Quiz

  • Introduction
  • Swap & Swappiness
  • Identify the System's Resources
  • Check System's Resources Usage
  • Keep an Eye on Something - The Watch Command
  • Real-time View Tools
  • Get Historical Data
  • Check Running Processes
  • Check Open Files
  • Checking Log Files
  • Log Messages and rsyslogd daemon
  • Rotate Logs
  • Schedule Jobs with at
  • Schedule Jobs with cron
  • Anacron
  • Chapter 6 Quiz

  • NFS Introduction
  • Setup NFS
  • Mount Filesystem Permanently
  • Chapter 7 Quiz

  • Adding Users
  • Manage Groups and Delete Users
  • Lock Accounts
  • Limit Disk Space for Users with Quota
  • Disk Limit with Quota - Practical Example
  • Chapter 8 Quiz
Load more modules

Instructor

Carmen Balan and Gabriel Avramescu

Carmen -Carmen Balan is a skilled Linux System Administrator with over four years of experience, holding an M.Sc.Eng. in Computer Science. She is certified in several key areas of her field, including LPIC-1: System Administrator, LPIC-2: Linux Engineer, ITILv3 Foundation Level, and AWS Solution Architect Associate. Carmen is passionate about Linux and is eager to share her extensive knowledge and expertise with others.Gabriel - Gabriel Avramescu is a highly experienced Senior Information Security Consultant specializing in ethical hacking and penetration testing. He works to identify and exploit vulnerabilities in data centers, applications, and network infrastructures, emulating adversarial tactics to assess security defenses. His expertise covers black box and white box testing, manual and automated code reviews, and the use of advanced testing tools for vulnerability assessments. Gabriel provides detailed reports and recommendations to help organizations strengthen their security postures. He is also proficient in analyzing web applications, web services, operating systems, and security architectures to uncover weaknesses and assist in developing remediation strategies.In addition to his consulting role, Gabriel is an accomplished IT trainer, offering courses in CEH, ECSA, CHFI, ECIH, and ICS-SCADA Cybersecurity from EC-Council, as well as Cisco CCNA and Linux Essentials. His extensive certifications include OSWE, CREST Registered Penetration Tester, OSCE, OSWP, OSCP, CHFI, ISO 27001 Lead Auditor, ECSA, CEH, CCNA, and CCNP, along with expertise in VMware and Microsoft technologies. Gabriel’s wide-ranging skills and credentials enable him to excel in cybersecurity, helping organizations protect their critical assets and information.

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