The Linux Boot Process (Linux+ Objective 1.1.2)

The Linux boot process, whether using UEFI or BIOS is elegant, but also a bit confusing. This video breaks down what actually happens, and looks at how to configure GRUB2 in order to change how our system boots.
Plus we talk a bit about troubleshooting kernel panics, both boot related and intermittent. This is all part of the CompTIA Linux+ Objective 1.1.2
The Linux+ objectives are available here:
snar.co/plusobjectives
#Linux #CompTIA #XK0_005
For all my online stuff, check out: shawnp0wers.com

[@stephen007777]

Hello Shawn. I want to thank you and know that your work is well appreciated by all of us! I hope you'll find the courage and the patience to keep up this series till the end!

[@shawnp0wers]

Thank you! And thanks to some pretty severe OCD, I won't be able to quit halfway through. Even if the training is terrible, I'll have to finish. LOL!

[@obrienortega6942]

Man, I love these Linux+ videos. Thank you. I truly appreciate it. Keep it coming!

[@scottb4029]

Thank you Shawn. You did the best job possible explaining a very complicated rabbit hole of a topic. Keep doing your great work!

[@shawnp0wers]

Wow, thanks! I really appreciate that. :)

[@RoystonLongdyke]

You're the man Shawn Powers. I'm studying for the Linux+ XKO-005 now and i'm glad that i found you. You're videos are great. I followed another paid course but i quit. It was to bad. You're video's are great to watch en fun to learn. I hope you are going to finish the whole course soon so i can follow all the objectives. Thanks Shawn for all the good work!

[@nesternunez8430]

not planning on taking the linux +, but here to expand my knowledge since I am studying for the solutions architect. fantastic job explaining the boot process and how to make changes. this was one of the subjects that stumped me the most.

[@randytayler7871]

Best explanation of this topic on KZbin. I want to hear anything this man says. I subscribed.

[@MySqueezingArm]

Thank you for taking the time to do this series. Returning student cramming for a Linux+. I use Arch btw.

[@TheDeadmanwalking83]

Hey Shawn... always has been a big fan of your work and teaching. God Bless You Partner... please don't stop teaching us

[@shawnp0wers]

I appreciate that! Thank you!

[@raphaelbitt84]

Wow! Great to find you here, have been learning with you since CBT Nuggets!

[@sadhucat4476]

Totally fascinated. Love learning this stuff!

[@damianpodgorski6977]

Hi Shawn, many thanks for putting together this amazing series ! I am watching each episode and can't wait the next one! I will watch this one at least one more time and do the hands-on part as well using my own Linux Mint box with Ubuntu and CentOS VMs on top of it

[@shawnp0wers]

You're very welcome! It's nice to be making this sort of training again. Oh, and be sure to check out Rocky Linux -- it's everything CentOS *used* to be, before it was killed off by RedHat. :)

[@damianpodgorski6977]

@@shawnp0wers rocky linux ? I will give it a try !

[@baytizzel]

I love these videos, such great explanations

[@human151]

This is excellent. Thank you Shawn!

[@abdirahmann]

shawn, Thanks alot. you've helped me alot. Thanks Alot and i hope and pray to GOD you have a very healthy life ahead of you. 🤝🙂

[@shawnp0wers]

Thank you! I'm really quite excited about this series. I think it will benefit many people, and since it's an exam prep -- the material to cover is already spelled out in the objectives. :)

[@djevans37075]

Nice - decent "straight forward" explanation - better than many others I've looked in to

[@Allysroadtorecovery]

Awesome stuff, fantastic teacher 👏

[@sktzoner]

Taking a course right now for my degree. Every class is a essentially certification prep and you do a better job of explaining certain things than in class. Had my first taste of Linux with Ubuntu 7.04 feisty fawn but started giving it attention really since 8.10 intrepid ibex. And been toying with it regularly since then. But there's still a lot of small detail a user may not catch. You did a great job of touching on a lot of that. Keep up the good work. Gained a subscriber

[@shawnp0wers]

Thank you! I try really hard to cover the objectives, but also make the information "useful" for daily work.

[@Eimantasks]

This is gold!!! so well explained! Thank you!!!

[@shawnp0wers]

Aww, thank you!

[@KelvinChuchu17]

Excellent explanation

[@LeoNux-um7tg]

After many research I think initramFS fully replaced initrd, because the initrd is for older linux (2.4 or older). initramfs was built directly to the kernel so they both run at the same time to mount the real root file system. Unlike initrd which needs to be first unzip to the memory(which creates more overhead because of the unzipping part) and then proceeds mounting the real root file system.

[@ITHAQVA]

Nice videos mate thanks 👍👍😊😊

[@MichaelGauthreaux]

Thanks for creating this video series Shawn! As a Network Engineer looking to upskill and maybe make some career changes I am loving your videos. I do have one question, what is your deciding choice for using rocky for the class over fedora or centos, or even rhel developer option?

[@vladislavgrin7122]

Thanks, very informative!

[@shawnp0wers]

Glad it was helpful!

[@TheRexhim]

Thanks very much man!

[@kmSaifullah]

Nice explanation 👍👍

[@shawnp0wers]

Thank you 😃

[@tyedye367]

I am going through the Linux+ course right now using the CompTIA CertMaster and their other products and the CertMaster does go into dracut and initrd for a few questions. Even the book does not really go into it, but there are a few questions on the practice tests.

[@jj74qformerlyjailbreak3]

You're absolutely 💯 on changing PXE too the rightful abrev PEE. 😂

[@mikeolear]

Thanks!

[@shawnp0wers]

O.O -- "this channel, basically sponsored by Michael O'Lear" at this point! You're incredibly generous, thank you.

[@mikeolear]

Thank you for all you do! Your trainings are so awesome!

[@Cdswjp]

Great!

[@jeremylemans3005]

Love your videos! You just made my system look stupid with "I'm not starting, killing init can't find initrd" at 24:20 😂😂 Now if this happens I can laugh at my computer.

[@perryj334]

Hi Shawn, love the course. Do you know where i can find labs to work on please. Any recommendations from your end would be much appreciated 🙏

[@shawnp0wers]

I'm not sure about pre-made labs, but I like to play with VMs when learning. Easy to set up, and snapshots mean if you break it you can revert...

[@madmoneymike2362]

Loving this course so far. Something I want to ask about is when you were in /etc/default, you ran grub- and got a list of grub- commands. Im on ubuntu and when I run that same command as root in the same dir, it tells me command not found. What am I doing wrong?

[@shawnp0wers]

Ahh, my apologies - I didn’t run grub-, I typed that much, and then pressed TAB. It’s autocomplete built into BASH. (See my KZbin short from yesterday for details!)

[@petrk281]

Thank you for your videos, they are super informative. I am new to Linux and I am confused by initrd and initramfs. I read somwehere else that a) system will use one or the other, not both at the same time and b) initrd is an outdated, deprecated thing used in old kernels and initramfs is the current way of booting linux. On the other hand you say (or at least that is how I understood it), that initrd is loaded first and then initramfs . Could you perhaps revisit this topic in a future video? Thank you!

[@shawnp0wers]

Maybe, but I’ll be honest, trying to suss those intricacies out is frustrating at best, and nailing jello to the wall at worst.

[@TheCommanderKIA]

thank you so much from thai

[@shawnp0wers]

Thank YOU, and hello! Now I want Thai food... Mmmmmmmm (Seriously, I make a vegetarian version of Basil Pork with diced mushrooms that has my mouth watering even early in the morning over here!)

[@ylajodiste1]

Great tutorial, learning a lot, thank you Shawn, a little question, What is the RDP client with which it connects to VirtualBox, I love it, can it be used with virtual manager?

[@shawnp0wers]

I don't actually use it anymore (I just use straight up Virtualbox) -- but the program I was using is: www.avianwaves.com/Software/Tools/RD-Tabs I really liked it! I switched when I went to Linux on the desktop. (I'm back on Windows... not sure why I haven't switched back to using RD-Tabs again... hmmm)

[@ylajodiste1]

@@shawnp0wers thank you very much, i was checking it, and it is discontinued, old y only for windows(I know now why you are not using it) I achieve the same target with Remmina, it works perfect

[@ZohaibHassanAfridi]

Hello Shawn, Your work is amazing and I highly appreciate that. I am also a student of Linux and also teach it as well. Could you please recomment me any good slides that covers complete content of Linux System Administration? Or do you have your own slides that you can share?

[@shawnp0wers]

I'm making slides as I go, but the full objectives list is available. snar.co/plusobjectives

[@Je.Suis.Flaneur]

In explaining GRUB, why do you never say: "GRand Unified Bootloader"?

[@davidmoore775]

I wish this video had more structure.

[@deside1407]

Still cant understand what initrd does. In my imagination grub copies kernel into memory and passes control, so why do we need something before?

[@shawnp0wers]

It’s such a specialized bit of Linux that every time I need to teach it or mess with it in real life (almost never), I have to google myself some clarity. Basically it’s like a very stripped down kernel that allows you to use enough stuff to load the actual kernel… I k is that doesn’t help much. :/

[@scottb4029]

I had a problem today. My Linux won't boot into my xsession correctly. I can get to launch into my XFCE desktop with starts after signing in on CLI . But the window manager/sign on screen doesn't appear. I want to get to that screen. Any suggestions? I am on mx Linux with XFCE. Also I already did update grub

[@shawnp0wers]

Depends on the distro - it would be a run level issue with Redhat (I think, unless that changed recently), otherwise it’s probably something with ldm/gdm/kdm, which is that initial login window daemon…

[@scottb4029]

@@shawnp0wers thanks Shawn I will give it a try. I can still get to my files, so all is not lost. Thanks for getting back to me.

[@scottb4029]

@@shawnp0wers Success !!! Figured out my default is lightDM. It was missing for some reason? I probably did a rm on something i shouldn't have. While I was working on finding it and trying to fix it, I saw the command 'timeshift' . I installed it. I knew I had snapshots of my system set up. Worked like a charm. Question: Could you do a video on timeshift and snapshots ? There really isn't much info out there in Utube , lbry, etc.

[@that70sgeek]

Does anyone else call UEFI - "yoofee" ?

[@gokul50000]

No just you

[@johnswanson217]

Europeans : "Oifi"

[@antwanwimberly1729]

I pronounce it You-ef-i

[@shanedavenport734]

EFISTUB & SYSTEMD-BOOT!!! Grub2 does not have to be used.