Linux Command Line Pipes and Redirection

Pipes and Redirection is probably something you see a lot of people do a bunch and that's because it's a very common and essential thing in Linux. It's easier than you think to learn and master.
Hope you enjoyed the video!
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[@gbuwally6326]

I’ve been doing Unix for 30+ years and went into this thinking “what could he teach me?” Thank you for always high quality content.

[@thingsiplay]

I wonder how fast the redirection works with The new 128 core Intel Core i14-9942KX?

[@isjav08]

Great explanations! Some extra stuff &>/dev/null And being able to just write it fully 2>/dev/stdout 1>/dev/stderr

[@trevorkruse449]

Great video man. One thing I would like to see more of is real world examples. But, that's just how I learn.

[@ScottSteely]

Thanks, Engineer Man. Pipes are really usefully for trying to chase down some of those pesky errors that only appear for a second then disappear.

[@HadToChangeMyName_YoutubeSucks]

Another example of redirect would be program1 1> out.result 2> out.err, which would give you the results and any errors in two different files.

[@RichardBronosky]

I have been using everything you described here and I’m still glad I watched it.

[@hitk002cloudfull8]

you can also use prog1 &> file.txt to redirect both stdout and stderr to file.txt

[@amarboldbatzorig7313]

Great video. Straight to the point and clear examples.

[@therealmaku]

great vids, pls do a video suggesting linux learning resources like books, courses, videos, etc. videos are well done and no bs, no fluff, this is much appreciated

[@DailyBeatings]

Pipes and redirections are my favorite things about linux and *.nix in general.

[@jumanjiwarlord]

🤯 aaaaaahhhh! I’ve been “aware” of pipes and grep for a long time but never understood them... this helped.

[@sasakanjuh7660]

Hey EM, great video, as usual! I was hoping you will also touch on redirections with exec, I alway had a difficult time wrapping my head around that, for some reason :D

[@kamildobrowolski143]

Hi Engineer Man - can you explain why the following piping doesn't print anything to the terminal? echo 'hello' | echo

[@EngineerMan]

This doesn't work because echo isn't designed to read from stdin. It's function is take a string supplied as arguments and output it to stdout.

[@youssefelamrani7905]

I'm a big fan amazing video thank you, can you please do a video about graph theory in python using the Dijkstra algorithms like how to define a graph in python etc .. much appreciated

[@Codester145]

Great video, love the Linux and Python content!

[@brainplot]

Great video as always! I have a question though. Why would I use named pipes over anonymous pipes? Do they offer any convenience or are they useful in particular and rare occasions where anonymous pipes cannot be used? Asking because although I knew about their existence I've never had a chance to use them :)

[@gbuwally6326]

Gianluca Recchia .signature was a common use of named pipes back in the day. An email program would take the content of ~/.signature and append it to the bottom of new emails. But say you wanted a random quote added to each new email? NAMED PIPES FIX THIS. You can write a program that takes a random quote and fits it into a signature block and then have it feed to a named pipe you happen to name ~/.signature. Now each new email has a fancy random snippet.

[@DS-rd8ud]

Have you done a video on process substitution, here docs and here strings? On a sidenote, I just discovered your channel and this is really interesting stuff. Keep is going, man!

[@EngineerMan]

Hey David, welcome.

[@kickflipz]

Great reference video

[@robc3129]

Really informative and to-the-point video. Well explained too.

[@SeamusHarper1234]

Really nice. Something made "klick" this time in my head.

[@petehinch3871]

Great tutorial as always. Thanks EngineerMan

[@RichardGreco]

How did you select only the carets in the text file when you added the additional caret at the end of the video? Great video!

[@urugulu1656]

but can i use named pipes to send the output of a command to two programs at the same time?

[@linux_in_urdu486]

You are legend mate, thank you for such a great video content!!!

[@johnm8358]

clear 2&>1 concise!

[@electricow1]

Is it true that piping a command to another is sometimes takes time to process, just like piping a watch command and awk it to filter the output, which is literally takes seconds to display. I found this case when i tried to make a monitoring script for my network devices by using fping to each of the hosts,

[@tobortine]

Why do you use the shebang "/usr/bin/env bash" rather than "/bin/bash" ? _(I'm genuinely interested to know if there's some advantage)_

[@EngineerMan]

What he said.

[@ehcaning]

That was perfect. Thanks for this great content!

[@Javier-ue5nt]

very good video, keep it up :)

[@hobartspitz1029]

Great video. Could you explain why commands with large files and many filters (> 10) bog down? In my case, the filters don't reduce the number of characters flowing thru the pipes. Is this because of how the filters are dispatched? How large are the intra-filter buffers? When I do the same thing on CMS/TSO Pipelines, it's hundreds or thousands of times faster. And it doesn't matter if I have 100s or 1000s of stages. What gives?

[@MaartenVanDamme81]

great refresher, thank you sir.

[@oyaraouf]

That was super helpful. Thank you so much.

[@IND_Abhi]

how are your 128 cores performing i wonder it might have finished cinebench is 1 sec

[@RichardBronosky]

Abhi Sec yes please!

[@eritert]

I wish this was the first video on linux i watched

[@SeamusHarper1234]

You probably would have been like: "What the hell is he talking about, i'll look for another vid that teaches me how to change the folder i'm in."

[@eritert]

SeamusHarper1234 hahaha probably true

[@cubodebits7721]

Hi E-Man!! I think it would be very interesting talking about centralised authentication/authentication solutions. SAML, Kerberos, etc

[@user-nx8tz5tw3d]

good shares

[@marcello4258]

Are you sure > is truncating instead of just making a new file and changing the link to the file?

[@ElliyahuRosha]

Great explanation

[@MsSoroar]

Fantastic

[@N0thingFR89]

and again : echo "You're the boss" > brian.engineerMan

[@dawid_dahl]

Thanks a lot!

[@jeanhirata1485]

Really usefull thank u very much

[@n3r0z3r0]

More !!!!! :)

[@ashantharindu8915]

Hey, the lessons are great. Can you please speak a bit slower?

[@jameshibbs6506]

Code Link give a 404

[@EngineerMan]

Sorry about that, please try again.