Ubuntu Linux Server Troubleshooting

Name: Ubuntu Linux Server Troubleshooting
Rating: 4.1 (290 reviews)

Learn to troubleshoot Ubuntu Servers like a boss! This intro to troubleshooting will have you fixing errors in no time!

Created byCody Ray Miller

Last updated 7/2015

English

What you'll learn

Troubleshoot Ubuntu Server Systems with Confidence
Read the Kernel Ring Buffer for Device/Driver Failures
Diagnose and Repair Common Networking Errors
Resolve Software Dependency Issues
Find and Fix Filesystem Errors
Critically Evaluate All Hardware Components for Problems

Course content

6 sections • 30 lectures • 2h 9m total length

Welcome2:03
Before We Begin...0:23
Troubleshooting Basics: Your Most Powerful Tool4:04
Develop a troubleshooting mindset by treating any server output as clues to the real issue, then unpack the output to reveal the root cause, such as a failing power supply.
Take The First Step: Scenario 17:37
Scenario 2: No Internet3:46
Diagnose no internet by first checking the server’s internet configuration and IP conflicts on the network, then verify with multiple tests rather than a single error.
Scenario 3: Intermittent Loss of Power3:02
Diagnose intermittent power loss by first inspecting the power source—outlets, strips, and connected devices. Then test cables and the power supply with a systematic, step-by-step approach without assumptions.

Using 'dmesg' to read the kernel ring buffer6:39
Use dmesg to read the kernel ring buffer, inspect boot-time hardware, and grep the output in a pager for network or PCI messages; review archived logs in /var/log/kern.log.
Reading common log files5:34
Explore the var log directory to locate major log files such as syslog, boot log, auth log, kern log, and dpkg log, and use grep and a pager for troubleshooting.
Viewing Basic Hardware Information in Ubuntu Server3:42
Discover how to view hardware information in ubuntu server using lshw and ls pci, with class filters like network, multimedia, and storage, and use df -h for mounted disks.

Networking Basics3:45
Verify the Ubuntu Linux server has an IP address with ifconfig and confirm internet access by pinging google.com. Optionally install and use lynx to test web connectivity from the server.
Releasing and Renewing a DHCP Lease4:28
Learn to use ifconfig and dhclient to release and renew a dhcp lease on Ubuntu server (eth0), with sudo root privileges and checking the interface ip address.
Static IP Configurations and Adapter Resets5:31
Learn how to configure a static IP on Ubuntu server by editing /etc/network/interfaces, using ifdown and ifup to reset the adapter, and verify connectivity with ping.
WIreless Configurations4:06
Configure wireless networking on ubuntu server by editing the interfaces file, setting wlan0 auto, choosing dhcp or static, and specifying ssid and wpa psk passphrase.
Verifying and Changing the Hostname (No Reboot Required!)2:55
Verify the current hostname, change it in the current session with sudo hostname [new-hostname], modify /etc/hostname and /etc/hosts to make it permanent, and restart networking without reboot.
Calling Up the ARP (Address Resolution Protocol) Table3:34
Using 'lshw' to View Network Adapter Information4:22
Use sudo lshw -C network to view Ubuntu's network hardware, identify the network interface (for example eth0), verify its status, and bring it up with ifconfig to troubleshoot connectivity.
Testing Download Speed with 'wget'2:34
Testing Latency, Download, and Upload Speeds with 'speedtest-cli'3:12

Errors Installing from Source Code8:38
Learn how to install software from source on Ubuntu, resolve missing dependencies like curses.h and groff, configure, compile, and test the program while interpreting error messages.
Using 'apt-get' and 'dpkg' to Fix Broken Packages2:04
Reconfigure pending packages with dpkg --configure -a and fix broken dependencies using apt-get install -f to recover from interrupted installs.
How to Completely Remove a Package (The Right Way!)1:44
Use sudo apt-get purge --auto-remove <package> to completely remove a debian package. Do not add an asterisk wildcard, as purge auto-remove handles related dependencies and prevents breaking the system.
Additional Options in 'apt-get'5:12
Learn to use apt-get clean, autoclean, and update to manage package archives, dependencies, and read error messages for troubleshooting on Ubuntu Linux.

Motherboard Troubleshooting7:26
Memtest86+ for Testing RAM5:47
Boot Memtest86+ from GRUB on Ubuntu server (pre-installed) to test all ram outside the os, then run for about an hour (overnight if needed) to detect errors.
Using 'memtester' to Test RAM (No Reboot Required)2:40
Test RAM on Ubuntu server on the fly without rebooting with mem tester; run as root to lock memory and note potential slowdown.
CPU Stress Testing with 'mprime'5:47
Learn to perform cpu stress testing on an Ubuntu Linux server with mprime, including downloading the correct version, extracting it, running the test, and safely ending the test.
Testing a PSU3:53
Using 'fsck' to Check (and Repair!) Filesystem Errors5:20
Run fsck to detect and repair filesystem errors, using sudo fsck -y to automatically fix issues on the target partition. Prepare backups and review options in the man page.
Checking the S.M.A.R.T. Status of HDDs in Ubuntu Server6:52
Learn to check hard drive health on Ubuntu server using smartmontools: install smartmontools, run sudo smartctl -x /dev/sdX to view smart data, and perform short or long self-tests.

Requirements

Students will need access to an Ubuntu Server.
VirtualBox (free) can be used to simulate an Ubuntu Server environment within Windows or Mac OS X, if desired.

Description

Linux is the fastest growing operating system in the world. Get the Ubuntu Server skills you need to succeed with Ubuntu Linux Server Troubleshooting.

Things break. That's why companies hire IT professionals like YOU! Learn how to fix common errors in Ubuntu Server without even breaking a sweat. Whether the issue is hardware or software related, you'll be able to tackle it with the information and shell commands I'll teach you.

In the course I will cover:

The Basic Principles of Troubleshooting
Reading the Kernel Ring Buffer with 'dmesg'
Obtaining Hardware Information through the Shell
Repairing Networking Issues
Resolving Dependencies in Software Installations
How to Systematically Diagnose Hardware Problems

If you want to increase your IT skills, this course is a great place to start. More and more companies are utilizing Linux servers in their day-to-day operations. So, don't be left behind!

All course updates are 100% FREE. Buy this course one time and you own it for life. Not only that, but you will also gain lifetime access to me as your personal instructor. Have a question about Ubuntu Server? Just ask! You, as my student, will always be my #1 priority.

Wait, are you still reading this?! The course comes with a genuine 30 day, no hassles, money-back guarantee. So, there is absolutely nothing to risk here. Enroll today!

Who this course is for:

This course is designed for those who would like an introduction to Ubuntu Server troubleshooting. Basic knowledge of Ubuntu Server is required, as this is not a course which teaches students how to use the system itself.
Advanced system administrators are discouraged from enrolling in this course, as they should already have a proper understanding of everything taught within the course.

Ubuntu Linux Server Troubleshooting

What you'll learn

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Course content

Introduction6 lectures • 21min

Generic Troubleshooting3 lectures • 16min

Networking9 lectures • 34min

Software Installation Errors4 lectures • 18min

Testing Additional Hardware Components7 lectures • 38min

Questions & Answers1 lecture • 3min

Requirements

Description

Who this course is for: