Linux Devices & Hardware (Linux+ Objective 1.1.3)

We've already learned that everything in Linux is a file -- but in this video we learn about the specific device types that are created in the /dev folder. That includes some special virtual character devices, namely:

/dev/zero
/dev/null &
/dev/urandom

We then look at how to identify the actual underlying hardware connected to the system, and a few extra $RANDOM bonus things along the way.

This is part of our CompTIA Linux+ series, and even if you're not interested in certification, is a great way to learn the nitty gritty bits of a Linux operating system.

The Linux+ objectives are available here:

#Linux #CompTIA #XK0_005

[TonyShasta]

Bruh... I couldn't focus after the 8:14 transition 😂

Great series. Thank you! 👍

[Cam-wsmc]

You have a serious talent for explaining particularly tedious info in interesting ways. You're incredibly engaging and I love watching your videos to supplement my study for the Linux+ cert, keep it up!

[lordligma]

Bro you are thorough i hope your channel takes off. You need to make a bunch of shorts so the YT algorithm recommends your channel more

[damianpodgorski]

Another great episode of Linux + series! Dev null can be compered with a black hole, everything goes in but nothing goes out 😂

[sethbuchanan]

Great video, when you when you read /dev/zero it does in essence give all zeros. The ASCII NULL character is eight zeros in a row so if you read that file it would give out zeros in groups of eight. A nice test is to read /dev/zero device with the xxd command with xxd /dev/zero.

[slade]

Excited to see the techy Mr. Rogers channel take off! Great video!

[jgc]

I have been having issues understanding concepts taught from udemy course. This channel has been very helpful.

[Dedseq]

The Wig did it for me.. LOL... talking about random!

note: this VOD is packed with lots of good information! thanks for sharing!

[HopliteSecurity]

This video was fantastic! I love the content and how engaging it is. Please keep it up ❤

[Graysonstillwell]

I don't normally leave comments, but I feel like I have to. Your Linux training is like gold. I've looked elsewhere and usually lose interest pretty quickly when studying Linux, but not with your channel. Thanks!

[Birtex]

Great series! Really fun to watch😁 Could you recommend any particular place in which we could do some CompTIA Linux+ test questions?

[sadhucat]

Binary black holes and null bit firehoses. Never realized Linux was this awesome.

[PaulHusek]

Good Talk. Just to be clear though, I believe $RANDOM provides a 15 bit random number (range of 0 to 2^15-1), rather than a "32 bit random number."

[NicozStrat]

Omg this video Is so good and useful man, thank you so much!!!

[MyNiceguy]

Just found your channel, fantastic content 👏 thanks 😊 👍 subscription earned 👏 👍

[dono]

dmidecode is not installed by default on some distributions (such as Arch).

[texperry]

FYI - dmidecode does not work on ARM products. There is no dmidecode table in the OS...

[xrafter]

As linux user . I didn't know about dmidecode. Also, /dev/urandom got some upgrades in newer linux versions. Never noticed that before even tho I read the change logs about it.

[samplesandtests]

how accurate is dmidecode? on one of my machines it is saying i can have more memory than the manufactures specs say online.

[scottb]

So, canbus protocol is a character device then?