Linux Crash Course - Understanding Logging

The Linux Crash Course is a series of tutorials that will teach you a fundamental Linux-related concept in each episode. This time around, the spotlight is on logging. In this video, you'll see some examples of log files that exist in Fedora as well as Ubuntu.

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*⏰ TIME CODES*
00:00 - Intro
00:59 - Get your very own cloud Linux server with Linode (sponsor)
02:21 - Log file examples from a Fedora instance
04:46 - Some log files may not be viewable as your normal user
05:52 - The dnf log file
07:35 - How to view the contents of the wtmp log file
09:18 - Viewing the contents of the btmp file
12:34 - Taking a look at some of the log files in Ubuntu
14:16 - The authorization log (authlog)
15:00 - Viewing logs in "follow mode" with tail
17:42 - Viewing the System Log (syslog)
21:56 - The dmesg log file
24:34 - The journalctl command*🎓 FULL LINUX COURSES FROM LEARN LINUX TV*

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Learn Linux TV provides technical content that will hopefully be helpful to you and teach you something new. However, this content is provided without any warranty (expressed or implied). Learn Linux TV is not responsible for any damages that may arise from any use of this content. Always make sure you have written permission before working with any infrastructure and that you are compliant with all company rules, change control procedures, and local laws.

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[emmashepard]

Have a linode box. SSH on port 22. (password disabled, root disabled). Took the output of authlog. Made a quick Python script to save all the user login attempts. Every day had well into 300 unique user login attempts. Logs are useful :D

[theshadow]

As a beginner, I found this to be very helpful towards learning about the tools available for troubleshooting in linux and in my case, ubuntu! Thank you!

[slobgoblin]

Perfect timing - I'm covering some logging material this week in my Linux class. Always nice to get some extra info!

Also, digging the new woodgrain aesthetic in the studio!

[Jupe]

I like Linux logs over Windows logs. This is great overview. Thank you.

[bzqgtvc]

greetings from Mexico, awesome channel. I plan to go through all your videos of linux crash Course and i plan to do it within a month

[KRMLN]

Get to know your log files while working in IT.

[kanutomay]

Great video! I think the /var/log/messages file is very important as well

[manojkumar-lfei]

Your videos are different from the others and will be useful for the newbies who steps into the system administrator career.

[WaySensei]

As a relatively new linux desktop user, this is very helpful for me to understand how to troubleshoot my system.

[Lucas_Fidalgo]

For a noob in this, that's a lot of easy to understand functions, great content!

[SimonHuenecke]

really nice videos, always covering little edges i didn't know about

[sametsahin-ehqj]

pls keep on posting lol I gotta learn linux

[albertoleo]

Very interesting as usual. Thank you for your great content
A question: how can I (permanently) clean all the logs? Maybe also regularly or on shutdown. Thank you

[djamolmukhtarov]

We need lots s of videos from you plz, everything about Linux for system engineers

[mustange]

I need to keep that follow option in my pocket more. The amount of FTP connection issues i go through that would be helpful to have when viewing the auth.log.

[rcdenis]

lnav can be a very handy tool, I use it all the time.

[zameerpashablr]

Lot of information and learning from you.

[thesilentgeneration]

I just recently installed Mint and the OS did prompt me after installation to add Nvidia and I did so with no problem.

[WillsJazzLoft]

I do not own a server. Yet, I wish to better understand what's going on in my distro the way a Windows power user would using Event Viewer

[canahmetbe]

Thanks. Could you make a video about NIC Teaming in Ubuntu please?