Linux Crash Course - Understanding Logging

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Күн бұрын

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
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Пікірлер: 41

@emmashepard2070 Жыл бұрын

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

@slobgoblin Жыл бұрын

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!

@nevarius9010 Жыл бұрын

SAME lmao

@user-bz5qg2tv6c Жыл бұрын

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

@kanutomay Жыл бұрын

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

@SimonHuenecke Жыл бұрын

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

@WaySensei Жыл бұрын

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

@theshadow6273 3 ай бұрын

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!

@Lucas_Fidalgo Жыл бұрын

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

@SoniaChavez-je7hq 5 ай бұрын

Superb way of explaining.

@manojkumar-lf1ei 6 ай бұрын

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

@portfedh Жыл бұрын

Great Video! Thanks

@KR1ML0N Жыл бұрын

Get to know your log files while working in IT.

@jacksoncremean1664 Жыл бұрын

You truly have no idea how many problems you can fix just by looking at the logs

@ethanrivers4057 Жыл бұрын

In my work we were having an issue where a VM was losing their TC connection. Problem been going on for months maybe a year. I got assigned the issue. Looked at the logs, immidiately found the problem.

@juanrebella2589 Жыл бұрын

Thanks! 😄

@zameerpashablr Жыл бұрын

Lot of information and learning from you.

@albertoleo9529 Жыл бұрын

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

@diablobarcelona Жыл бұрын

dmesg -T is a handy one

@djamolmukhtarov3328 8 ай бұрын

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

@jwspock1690 Жыл бұрын

tnx for the video

@rcdenis1 Жыл бұрын

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

@georgehope5477 Жыл бұрын

So this is a mix of journald and rsyslogd due to the switch from fedora to ubuntu which is a little confusing. Rsyslogd has been deprecated, would you advise running it in parallel?

@andreas_tech Жыл бұрын

Thanks. Do you know, how I can see, which files were downloaded (or edited) during a specific time period (days)?! I have an apache linux machine. Big thanks

@canahmetbe Жыл бұрын

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

@JohanEkelund84 Жыл бұрын

Great video as usual! One question, when you install different distros all day long, how do you do this? Using USB thumbdrives? Or do you use som sort of PXE boot install solution for this? I have been looking for a solution for this that is not to much of a pain to use. Thanks!

@0eieiei Жыл бұрын

Virtual machines, my guy. Linode. There's videos on all of it.

@2mustange Жыл бұрын

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.

@HanTrio Жыл бұрын

Alternatively, you can also press "F" (capital f) when using less, or open a file in "follow mode" with less +F /path/to/file