Linux processes, init, fork/exec, ps, kill, fg, bg, jobs

[@TheHermitHacker]

Been a linux user since 1995 but I still learned something. Thank you!

[@EngineerMan]

Glad I could bring you some new knowledge!

[@smudgepost]

Same (1993) Still have trusty Using Linux Sixth Edition (QUE) on my desk..

[@heXan]

Same here since 1999... Only used kill with -1, -2, -9... fg and bg were new to me. But as a lazy dev I've used it from' top' (even better 'htop') or directly with 'xkill' - point and click style :).

[@Hakusha]

these linux videos are fantastic

I don't think I ever hear such clear explanations. Thank you very much! Instead of using 'clear', you could use 'CTRL+L'.

[@AbhishekBM]

But it's not the same as clear. It just scrolls the current prompt to the top, you can still see the older commands when scrolling back up

[@poorgirl9458]

and when you go ‘set -o vi’ to enable vi mode at the bash prompt ‘ctrl-L’ does not work

[@maxpolaris99]

This was an excellent video that got me up to speed in a hurry. Very well organized and nicely explained. A great jumping off point for my own exploration. Thank you!

[@Diprotic]

I'm 3 minutes in & I've learned A LOT! Thank you! You're the kind of people we need on youtube regarding linux.

[@MiserableDuck95]

Where was this 3 months ago during my Operating Systems course?

[@diggydude5229]

You're looking for W. Richard Stevens' books on UNIX programming, where all of this stuff is explained in detail.

[@ChudLife]

going through it right now in OS course and it is kicking my ass I feel like I am watching the Rockwell Retro Encabulator video

[@stargentitude7154]

I am learning this at college, but everyone one is struggling due to our harsh teacher making the most hardest test questions. He does not give good material to study, but thank God I came across your channel. I finally understand the real purposes of these commands and enjoy this now!

[@zachmane2]

Always appreciate the quality of your videos. Goes in depth, but accessible to beginners

[@EngineerMan]

That's my aim :)

[@MehdiShokoohi]

That was amazing Engineer; wish i could 'fg' all of my postponed tasks and "kill -20 bad-mood" !

[@ShivamJha00]

Why not kill -9 it :D

[@justChuka]

U mean 9?

[@abhishekshah11]

I'm happy that I recognized all the commands :)

[@freeuyghur2063]

11:54 We can use `watch -n 2 jobs` to monitor jobs command every 2 seconds. so we can show the realtime result from pane 1 when the process killed at pane 2. some energy efficiency and fun than manually type a repetitive command.

[@brandon.duffany]

Thanks for this awesome tip! This is a game-changer!

[@bitelogger]

I wish knew your name to properly address my thanks to you and this great video...The quality f your explanation but also the goodwill to share it with the community, my deep respect!!!

[@EngineerMan]

My name is Brian :)

[@justchecking12]

your content is neat and tidy I can't be grateful more for what you've done on this channel. your contribution for linux learning community is huge

[@kavithapriyacj4868]

Just a wow content .. awesome man that u indirectly mentioned about difference between killed and terminated process ..love u

[@IctioPar]

Great content! I've recently started working with linux again and it's awesome to get to know more!

[@yeeeehaaawbuddy]

These are very involved processes, but you explain it all so well, and in such a good order. Thanks!!

[@aminebouaita9202]

I want to thank you for the quality of your videos, not just this one. All of your videos

[@EngineerMan]

You're welcome!

[@fruitygranulizer540]

this was so incredibly well explained. my prof was making a shit show out of this chapter by just throwing a bunch of words at us. going back and reading his lecture notes, i can understand it now, and i furthur can see how poorly written his lecture was. thank so much for this.

[@EngineerMan]

Glad it helped :)

[@tigercake558]

really love these videos, I'm learning a lot. Very very accessible and clear videos, please keep up the good work.

[@rushikmakwawna]

Very well explained. Keep uploading such videos. Sound clarity is really good.

[@aayyaa1188]

You make the concept of these command so clear. Thank you soooo much

[@skyloreBOTS]

Dude props on how well you explain everything!

[@somber_soul]

Very helpful. I've only ever seen htop for process management and this helps to understand the underlying signals being sent. Thanks!

[@TheFarmacySeedsNetwork]

The few videos of yours I've seen are excellent and simple explanations! I will be sharing these with my friends (who are learning) and also my users from my Raspberry Pi series. cheers!

[@EngineerMan]

Thank you :)

[@TheFarmacySeedsNetwork]

Thank YOU :)

[@gana706]

Ctrl c sends a SIGINT signal. Init is the first process pid = 1 Bash first fork (copies ) the process and than exec (replaces ) the process as child process. T = stopped state S = Interuptable sleep state ( Running in bg) Kill -15 Kill -2 Kill -1 Kill -9 ( my fav )

[@georgichelenkov4360]

Great job! Recently found these series and am fascinated! Subscribed immediately! Keep up the good work!

[@ZacKoch]

Great as usual!

[@zgredfryd]

Thank You man! I really like your videos. I know what those commands do, but Your explanation of what is really happening in Linux is golden! Yo have a gift to explain things and teach people. Great, great stuff. It's helping me a lot.

[@MichaelMantion]

You are a life saver. You are exactly what I need right now. TY.

[@bzielinski]

Brilliant and simple explanation about kill signals. Thank you.

[@jorgediaz6730]

One thing I find very useful is having a process run outside of their parent process So For example if i run a long running process on the bash terminal I can exit the terminal and check on the process later on. You can do this with the screen command.

[@ezequiel9055]

I wonder what distro are you using since your 'kill -l' output is so different than mine. Yours is more complete and is numbered while mine is just a list of signals, completely useless. As usual great video, very well prepared and organized, and your communication skills are superb ;) you are a very good teacher. I've been a linux user since 1998 and still learning things. Very much appreciated.

[@tpaq]

Most shells supply a "builtin" version of kill, try: "type kill". The presenter uses the Bash shell. I use Z-Shell, and its builtin is quite terse. try "/bin/kill -L".

[@yangzhang2303]

Really nice and clear. Would you like to make an video about using strace ?

[@naveenagarwal287]

It's funny that kill can also bring a process to life as well.

[@josephemmanuel4089]

Thank you. This really helps me for my current project

[@patrykp8460]

after watching 15 sec I knew that this is proper and what I was actually looking for :D

[@lavellefloyd4639]

I appreciate you sharing wisdom to linux noobs like myself

[@tdkiran]

Thanks you for this video . Would like to see more on Linux/unix series

[@danielmoita6151]

hey just started watching your videos and they have helped me a lot. i like they way you explain. Would you be willing to do a video explaining named pipes for server-client, using multithreading or select() for parallel requests? Thank your for your videos, and keep up the great work :)

[@alexanderradyuk9204]

Good job 👍🏻 The way you explain is awesome. Even knowing such things I continued watching. Keep it up!

[@EngineerMan]

Thanks for the kind words, hope I helped in some way.

[@lawrencedoliveiro9104]

3:36 specifying ps options without a dash is BSD-style syntax. Probably best avoided.

[@4932gb]

Been using unux since 1980 and linux sice 1995. This is good stuff!

[@vaibhavppandey]

Wow :O

[@mikefdorst]

Thanks man! You just upgraded my workflow.

[@behruzm]

Excellent explanation of the above terms

[@travelogue7960]

Hi Engineer Man, Have a series of videos on sed and awk commands.. Thanks in advance.. An Engineer

[@RussTeeTrombone]

Thanks so much for these videos. You’re truly a jack of all tech trades.

[@lawrencedoliveiro9104]

3:05 Perhaps make it clearer by pointing out that the “exec” command is a bash builtin which tells it to skip the fork() call before running the rest of the line as the actual command.

[@v0idvlr1]

Learned too much with this video, thanks too much man!

[@wramarante]

UNBELIEVABLE !!!...why??? Personally I have the habit to check the ratio dislike/like of all videos I intend to watch. I don't go around looking for higher or lower ratios, I just do it before watching it. That said, most of excelent videos I have watched has a ratio score between 1% and 3%. This video of yours has the impressively amazing ratio of 0.35% (5/1400)... You got a new susbscriber and a big fan on a 20 years linux admin.

[@EngineerMan]

:) Welcome.

[@pierrebouchard4289]

Great video ... Learned a lot ... You're a gentleman and a scholar ...

[@photopicker]

That was amazingly clear and insightful.

[@glikar1]

Superb clarity as usual!

[@bharatsnair]

Also check out pstree, which lets you view processes as a tree, helps you see the forks and execs.

[@qeithwreid7745]

You have taught me that kernel has parent ID of zero. This is the foundational level upon which I shall build many great things.

[@Diprotic]

It's a kernel like a popcorn kernel.

[@qeithwreid7745]

Diprotic there is a grain of truth in that.

[@prabodh11]

Great video, Informative, thanks for sharing🙏

[@JTKroll12]

really love your videos I learned a lot of stuff about killing

[@leonardodavinci4259]

Exactly what I needed. THANKS!

[@bludblind]

Clear and concise information. Thank you!

[@radubojica7888]

They took yerr jobs !!! Great video man btw. I learned some things from this which my Operating Systems teacher didn't teach me. :)

[@davidrmcmahon]

I just like getting the uptime of my pi-hole and Jellyfin server Pi. Two weeks so far, hoping no power blackouts!

[@mybean1096]

Processes are very powerful if you understand them. Theres this wonderful site called man7 that covers processes, daemons, and much much more. Theres also lots of IBM documentation on how to write a processe. Anyway thanks for the vid I haven't studied it in a while.

[@carlpilongo539]

Thank you for teaching us Linux, Programmer Mrbeast

[@catorials444]

I love that mr. beast takes up software engineering.

[@vaibhavppandey]

Hehe

[@hostgrady]

Very interesting, hopefully I can use these in shell scripts for something

[@natahmad84]

Thanks dude, pretty clear and simple!

[@MiseryFarm]

I'm really enjoying these videos. Thanks

[@frroossst4267]

Super helpful, super concise, thanks!

[@xpkareem]

I learn a lot from your videos. Thanks!

[@MrSURENDRAGAMEBOY]

Better then my teacher :) awesome man

[@isaacvv]

Thanks for the videos. Keep them coming!

[@adamnshame]

FYI It is possible for "kill -9" to fail. If it does, the disk is probably full.

[@rishko2224]

Or it's waiting for an io operation. It happened to me on a networked drive

[@Didanihaaaa]

thanks for such a great channel. I heard about parallel computing on Linux. could you please teach us some parallel computing stuff? bests

[@jonassteinberg3779]

well organized and delivered

[@kapilsonyt]

I have learned something new. Thanks much.

[@ForceHunterHD]

Great linux videos. I hope more are coming cuz i rly want to learn linux

[@bendover4728]

Awesome! Where can I find more information like this? I wish to learn and have deep understanding of Linux functioning, commands, etc

[@yura979]

I would never expect young Che Guevara to make such good clean videos. Thanks.

[@EngineerMan]

Lmao.

[@olehbaranovskyi2219]

thank you, great tutorial!

[@diggydude5229]

I don't believe a forked child process returns to the parent. The two processes run concurrently, and the child emits a SIGCHLD signal when it completes. The parent will have a signal handler that tells it what to do when it receives SIGCHLD, for example display a message that the child has stopped.

[@athmikagowda6728]

Awesome vedio.....All linux users should have a look

[@ag.4937]

Brilliant explanation, Thanks

[@flakkanon]

Nice video for recap as a linux user

[@SubiqT]

Excellent explanations, thanks a lot

[@squid11160]

kill -9 can fail in some cases, like killing a fuse-ssh process for a mount that failed due to a networking issue. Fuse is a user space process but is intertwined with kernel functionality.

[@EngineerMan]

Fair point.

[@samkachar]

Learned alot about killing

[@unstoppable-ar3292]

Very good. Thanks man. Legend!!!

[@fontanot]

great video, you just earned another subscriber

[@benjaminfowler3532]

that was beyond amazing.

[@Yash-gi4iq]

thanks for the wonderful explanation , can you tell us how the kill-3 command is used for taking thread dumps .. i mean i know that this command takes the java thread dump but wanted to know the working as i see kill -3 is sigquit...

[@armandnouri8207]

Great video. Why do different jobs listings appear for different bash log-in sessions?

[@lawrencedoliveiro9104]

Are you planning to talk about process groups and sessions?

[@lawrencedoliveiro9104]

9:53 Not any more. It shows the notification that the process has terminated, and when you do another “jobs” listing, it won’t appear any more.

[@MatthewStidham]

That was a killer video. Thanks!

[@janignacio7810]

You are awesome! Thank you.

[@ajiththiyar7609]

This is so helpful thank you man, keep it up.

[@nidishmodala3638]

thank you so much for clear explanation

[@dadda-w3c]

thanks Mr.Beast for this very good explanation 😁😅

[@braulioramirez3463]

One last thing EM, could you do some videos about HTML/XML, website hosting (using dynamic DNS for instance), etc.? I have some javascript projects I would like to share with everyone but first I need to know how to create a web server to host my very own website, (possibly a VM version of a recommended Linux distro). This could start as a barebone, text editor-based level HTML/XML code tutorial. I'm sure not everyone knows how to write HTML/XML code so a tutorial would be useful! As markup language continues to evolve, understanding the basics and comparing it with the way many browsers use this code would be very educational. As always, thank you so much for sharing your knowledge with this community.

[@EngineerMan]

I actually did a live stream on this. Check for my livestream that has a title like "getting that sweet website of yours online".

[@kushaltanna5569]

for fg,bg and kill you could show text files to make it easy understandable.! i read the topic so i could understand but it would be easier.! But still it was very nice video.! SUbbed.!

[@roeyleon22]

Very good explenation ! - subscribed :)