Learn Linux Administration Through Practical Examples

Name: Learn Linux Administration Through Practical Examples
Rating: 4.6 (369 reviews)

Linux Tips: First steps into becoming a successful Linux server administrator by learning different Linux distributions

Created byCarmen Balan, Gabriel Avramescu

Last updated 8/2024

English

English [Auto],

What you'll learn

At the end of this course you will be able to perform many of the daily tasks of a Linux system administrator.
You will know how to control the boot process, deal with disk space, configure the network and troubleshoot issues.
Along with the video lectures, there are also exercises to help you practice what you learn.
What you will learn in this course applies to many distributions (Debian, Ubuntu, CentOS, RedHat, Fedora, etc)

Course content

9 sections • 68 lectures • 4h 6m total length

Tips & Tricks11:14
In this lecture, I will share some of the tips and tricks for dealing with the Linux command line. It will help you keep the pace and understand better I will be showing you throughout the rest of the course.

Introduction0:37
This is an introduction lecture to show you the content of the rest of the section.
Understanding the runlevels and targets2:56
This lecture explains the role of the runleveles and targets as well as what they are.
Current and default runlevel1:30
This is a practical example of how to identify the current runlevel and also the default one a Linux servers boots into.
Default runlevel Ubuntu - init0:37
This video shows how you can change the default runlevel when using an Ubuntu server.
Listing services in certain runlevels1:58
In this video, you will learn how to list the services that are active in a specific runlevel.
Enable/Disable a process from starting at boot - init6:10
This lecture shows how you can make a program start automatically at boot time as well as disabling them from starting by itself when Linux server boots. This helps you control the boot process.
Default target - systemd1:10
Newer distributions has replaced the runlevels with targets. However, they have the same role and purpose.
Dealing with processes - systemd1:16
This video shows you how to start/stop processes using systemd instead of init. Attached to this lecture, there is also an exercise to practice what you have already seen in this section

What is LVM?2:11
This video explains what LVM is when dealing with disk space.
Steps on how to create a volume group1:18
In this lecture, you will get to know the steps necessary to create a volume group.
Steps on how to extend an existing volume group0:22
These are the steps to extend an existing volume group when you want to add more disk space.
Steps on how to decrease disk space by reducing the volume group0:59
Learn to shrink a volume group by resizing the filesystem and reducing the logical volume, move data if needed, and remove the physical volume, using a live cd.
Add virtual disk in VMware Workstation Player0:41
Add virtual disk in Oracle VM VirtualBox1:05
Power off the virtual machine, open Oracle VM VirtualBox settings, go to storage, select a controller, create a new fixed-size disk of 1 gigabyte, name it, and attach hard disk.
Create volume group and logical volume5:39
Create a physical volume from the new drive, establish a volume group named fgOpt, and carve a full-size logical volume. Format, mount to /opt, and configure fstab for automatic mounting.
Extend existing volume group and logical volume2:31
Reduce logical volume3:13
Resize filesystem and logical volume1:22
Extend the filesystem and the logical volume with the unallocated disk space from the volume group, after removing the physical volume.
Extend Disk Space

Introduction0:51
Change the hostname0:48
DNS nameservers3:11
Resolve queries locally with /etc/hosts1:34
Configure the /etc/hosts file to locally resolve names to ip addresses and block access to certain websites. Save changes and restart the networking service to apply them.
Determine the order for DNS queries0:47
Explore how a Linux system resolves a domain by first checking the hosts file, then querying the configured DNS servers in order to obtain name information.
Setup a static ip Debian/Ubuntu4:11
Setup alias ip1:30
ip vs ifconfig commands6:15
Adding routes6:33
Explore how to view and manage routes, set default gateways, and test reachability using route commands. Learn to distinguish routing actions from firewall rules and use iptables for traffic control.
Network configuration for CentOS/RHEL3:48
Connect remotely with SSH6:56
Servers fingerprints2:57
Setup firewalls with iptables7:02
Iptables-persistent6:02
Learn to configure iptables-persistent to save firewall rules across reboots, including startup scripts, for IPv4 and IPv6. Implement selective allow and block rules on ports 22, 80, and 443.
DNS Configuration

Introduction1:50
Ping command4:13
Learn to diagnose Linux connectivity with the ping command, verify network interfaces and assigned IPs using ifconfig, and troubleshoot DNS, firewall, and gateway reachability to external hosts such as Google.
What happens behind the ping command1:03
Traceroute command1:20
Learn how the traceroute command helps troubleshoot connectivity by showing each hop and the path packets take to reach a destination such as google.com, including gateway and next hops.
Netstat & ss commands6:43
Capturing network traffic with tcpdump5:46
Deciphering the output of tcpdump3:49
Interpret tcpdump outputs by identifying the source, the destination, ports, and flags, and understand the TCP three-way handshake, parameter negotiation, sequence numbers, and acknowledgments.
Identify open connections

Introduction1:05
Swap & Swappiness3:08
Identify the system's resources6:50
Identify the system's resources by examining CPU details, kernel version, host name, and architecture, then review /proc data and PCI devices, plus storage with partitions and volume groups.
Check system's resources usage4:28
Keep an eye on something - the watch command1:57
Use the watch command to monitor system resources in real time, refreshing every two seconds. Track disk space, memory, and network packets to analyze resource utilization.
Real-time view tools8:44
Get historical data5:00
Check running processes2:52
Check open files4:04
Log messages and rsyslogd daemon3:59
Checking log files10:14
Rotate logs9:08
Learn how logrotate rotates and compresses log files to prevent disk space issues, using frequency and size limits, keep counts, and per-application blocks.
Schedule jobs with at8:14
Schedule jobs with cron9:43
Anacron4:28
System troubleshooting

Adding users4:15
Learn practical Linux administration by creating and deleting users and groups, and assigning users to groups. Explore unlocking accounts, password setup, home directories, and switching users for verification.
Manage groups & delete users2:36
Learn to manage groups and delete users in linux by adding users with usermod -aG, listing members with the groups and the members tools, and removing users with userdel.
Lock accounts4:07
Limit disk space for users with quota7:46
Learn how to enforce Linux disk quotas by configuring user and group quotas, editing mount options, and managing soft and hard limits for home directories.
Disk limit with quota - practical example4:14
Final Quiz

Requirements

Have passion to learn and improve
You should be able to perform basic commands in Linux. This course is not for absolute beginners. However, you only need to have a basic understanding of what Linux is and to be able to open a terminal and use simple commands as changing the directory and listing files.
Have at least one Linux virtual machine (Ubuntu, Debian, CentOS, RHEL ..)

Description

Mihai says: "This course actually gets you some clues, which you would not know by the 1st touch. Carmen Balan is a great instructor when it comes about to explaining advanced working habits."

Teodor says "The instructor was explaining the information in a good and structured way. There are practical examples, and it's very good that I can download the PDF materials and exercises! A little bit slower would be good, but overall it was a very good course"

Petru says "By far one of the most useful course on Linux environment. The instructor is extremely prepared. I'll recommended with all my heart."

Eddie says "Although I know 99% of what I have seen so far it has all been explained and taught very well. Excellent material for a newbie."

This Linux course was designed to share my experience as a system administrator through practical examples and scenarios. If you would like to start a career in Linux or simply improve your knowledge, this course is for you. Throughout the course, I will show you many of the tasks you would encounter when administering a Linux server.

Since being a system administrator, I know you might need to deal with more than only one Linux distribution, what I teach in this course, applies to many of them.

I know that the best way to learn something is by actually doing it, so I created this course by showing how to accomplish the tasks rather than just explaining how to do them in theory. Moreover, along with the video lectures, you will also find exercises to help you improve your hands-on experience. You will benefit for free from any new lectures and updates on the course.

Keep in mind that if you are not happy with the course, you can ask for a refund and take advantage of 30-Day Money-Back Guarantee.

Who this course is for:

People who would like to take up their Linux knowledge to an upper level
Those who want to start a career as a Linux system administrator
Developers who need to administrate a Linux server

Learn Linux Administration Through Practical Examples

What you'll learn

Explore related topics

Course content

Undefined1 lecture • 11min

System Startup8 lectures • 16min

Disk Management10 lectures • 19min

Network & Security14 lectures • 52min

Network Troubleshooting7 lectures • 25min

System Troubleshooting15 lectures • 1hr 24min

Network File System3 lectures • 15min

User Management5 lectures • 23min

BONUS Lectures5 lectures • 1min

Requirements

Description

Who this course is for: