Introduction to Advanced Bash Usage - James Pannacciulli @ OSCON 2014

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  • Опубликовано: 22 дек 2024

Комментарии • 67

  • @arabiccola
    @arabiccola 12 дней назад +1

    This was very stimulating and thoroughly enjoyable. It allowed me to understand how many of the subtleties I observed and experienced over the years come together.

  • @gregoryshields4258
    @gregoryshields4258 Год назад +5

    I’ve seen a lot of bash tutorials. Your presentation may not be a tutorial, but it’s pedagogic gold.

  • @4rm4n82
    @4rm4n82 3 года назад +29

    01:56 Command Types
    03:38 Getting Help
    04:22 Some Useful Definitions
    05:29 Return Status
    06:42 Compound Commands
    07:09 While and Until Loops
    08:50 For and Select Loops
    11:52 Tests
    14:23 Conditionals: if
    15:03 Pattern Matching
    15:50 Conditionals: case
    16:59 Command Groups
    21:36 Redirection
    22:11 Command and Process Substitution
    23:09 Parameters
    31:03 Arrays
    33:50 Arithmetic Expansion
    35:24 Brace Expansion
    37:49 Functions
    40:35 Session Portability

  • @michaelkrailo5725
    @michaelkrailo5725 Год назад +1

    The best part of this whole video is right near the end showing the declaration of functions and parameters that can run on remote hosts. I knew about declaring functions in the current shell but this makes me want to convert some of my scripts to functions now just so I can run them on other hosts without having multiple copies of scripts all over the place. Awesome even eight years later.

  • @OriginalRaveParty
    @OriginalRaveParty 5 лет назад +22

    I've been programing with Bash for two weeks, and even I can see just how powerful these tips are.
    I guess that the presentation was for advanced users, so I admit that the pace is far too fast for me right now, but that's the beauty of video. I can pause and take the information in, or code with the example onscreen, then unpause. Thank you for the knowledge!

  • @RC_Cola2020
    @RC_Cola2020 4 года назад +2

    So much better than those conference talks that are marketing in disguise

  • @RoelVandePaar
    @RoelVandePaar 2 года назад +1

    Use "bc" (sudo apt install bc) for floating point arithmetic. Great talk.

  • @ReneHoffmann194
    @ReneHoffmann194 5 лет назад +33

    This is a nice summary for all bash users and gives a great overview over its features. Well done!

  • @Jayanth943
    @Jayanth943 5 лет назад +4

    Such wonderful things you have shared with us..even though video is relatively few minutes,took hours for me to gasp major content.. thanks for your effort

  • @jpphoton
    @jpphoton 4 месяца назад +1

    excellent presentation. thank you.

  • @Bestietvcute
    @Bestietvcute 3 года назад +2

    Very well presented ! Valuable information and Straight to the point

  • @wakinglife7355
    @wakinglife7355 3 года назад +3

    Thank you finally I found what I needed to understand some bash, before I was just copying stuff.

  • @monday6740
    @monday6740 6 лет назад +2

    Such a nice presentation ! To the point & right on pace

  • @ChillerDragon
    @ChillerDragon 4 года назад +1

    29:43 o.O pointers in bash thats nice and i am for sure going to use 40:36 declaring own functions on remote hosts! Thats awesome thanks for the talk

  • @catlord69
    @catlord69 3 года назад +3

    This is so cool ! More advanced lecture would be awesome !!!

  • @echosystemd
    @echosystemd 8 лет назад +4

    Saw it on reddit r/linux. This is really a great intro to bash.

  • @9SMTM6
    @9SMTM6 4 года назад +2

    Well, maybe that is due to the 6 years that went inbetween, but these days theres quite a few situations where you won't have bash, I. E. when using a Docker container or an IOT device with a slim Linux.
    And even if you're on a full blown system better don't forget the shebang for bash if you use bashisms, as lots of people use I. E. zsh, including most people that use Mac OS as it's their default shell

  • @l2ubio
    @l2ubio 6 месяцев назад

    16:10 what are those "recent additions" for more complex matching?

    • @davidh.4944
      @davidh.4944 6 месяцев назад

      He's probably referring to the extended globbing (extglob) patterns, and/or the ;& and &;; operators that allow multiple patterns to match the same input string.

  • @AdamDymitruk
    @AdamDymitruk 8 лет назад +5

    excellent presentation

  • @bhootpurvmanusya
    @bhootpurvmanusya 2 года назад

    is shell scripting this new
    that just in 2014 it had to be explained in an convention
    to me shellscripting or sql are simple english as long as u understand object and have the required laziness to automate . u can excel in this field.

  • @rebjava
    @rebjava 2 года назад

    Excellent video. Thank you.

  • @davidh.4944
    @davidh.4944 6 месяцев назад

    I'm sorry, but I kept waiting for the promised "advanced" usages, yet all I got were the same old bog-standard features I've known about for ages. Loops, tests, functions, parameter expansions? What's advanced about those? Only the very last hint with *declare* was kind of new to me. I had never thought about using it in that way before.
    I suppose it will help some relative newcomers, and more power to them, I guess, but the title is a bit misleading. You'll learn much more reading the Bash FAQ and Bash Pitfalls pages at Greg's Wiki.

  • @Mike.Freeman
    @Mike.Freeman 8 месяцев назад

    I knew some of this stuff but not all of it.. we always have something to learn!😁

  • @anunez20
    @anunez20 4 года назад

    excellent. Hello James, I have a question, did you make your presentation in Latex o something else. I liked the syntax highlight ..

  • @toplaz007
    @toplaz007 9 лет назад +4

    Great stuff for beginners in one shot.

  • @ChrisAthanas
    @ChrisAthanas 3 года назад

    Very nice presentation

  • @wongright
    @wongright 8 лет назад +2

    James,
    Really useful slides & well paced presentation!
    You mention "not logging into this account for some time", do you have another YT/Vimeo account where you host more material like this? It was really good.

    • @jamespannacciulli3029
      @jamespannacciulli3029  6 лет назад

      Thank you! At the moment there's no other home for this stuff, I just don't spend much time logged into youtube. When/if I have more talks, www.jpnc.info/talks should be updated.

    • @olivierdulac
      @olivierdulac 4 года назад

      @@jamespannacciulli3029 James, I highly enjoyed your talk (I even learned a few neat tricks I haven't thought of). But please replace all those "echo" and "echo -e" with "printf" equivalents ^^ (let echo die... users should use printf. It will be much more consistent in its display, across shells and versions, and will be without several edge cases (printf "%s
      " "-anything starting with a minus", for exemple, will never barf. and lots of other related problems get avoided as well)

  • @shadiandrew
    @shadiandrew 8 лет назад +1

    Thank you sir , great stuff.

  • @JanPhilippHeinrich
    @JanPhilippHeinrich 5 лет назад

    question: the loop examples: is he loading them out of a file, or where does it come from? thanks in advance

    • @jamespannacciulli3029
      @jamespannacciulli3029  4 года назад +2

      eventually, i released the scripts i made to pre-load my example commands as ariketa:
      git.jpnc.info/ariketa/about/
      basically, i put all the examples ahead of time into an array in memory, using bind shortcuts to be able to quickly cycle through them as if they had been typed into the shell directly. i figure this saves time so that i can keep the pace up, while avoiding all the obligatory live demo typos. so something like "while read var1 var2; do echo $var2 $var1; done" would be loaded onto the command line when i cycled forward to that example from my array, then i would just type in the text like "one two" manually and the loop would return "two one" in that case.
      in case you are interested, i made a little write-up of my thinking and methodology here:
      www.jpnc.info/posts/en/2017/06/ariketa.yo/
      hope that answers your question, sorry for the late response!

    • @apolopena
      @apolopena 3 года назад

      @@jamespannacciulli3029 Great way to teach!

  • @MartinsTalbergs
    @MartinsTalbergs 8 лет назад

    James, slides link broken :(, would appreciate

    • @MartinsTalbergs
      @MartinsTalbergs 8 лет назад +2

      found: cdn.oreillystatic.com/en/assets/1/event/115/Introduction%20to%20Advanced%20Bash%20Usage%20Presentation.pdf

    • @jamespannacciulli3029
      @jamespannacciulli3029  8 лет назад

      +Martins Talbergs Sorry about that! Slides are back online at the link above in the video info.

  • @nikoachtzehn4776
    @nikoachtzehn4776 8 лет назад

    so much content! thank you

  • @ruebemfonsca4078
    @ruebemfonsca4078 8 лет назад

    Great vid. Thank you!

  • @Gpurezza
    @Gpurezza 8 лет назад

    how to make a while loop in terminal?

  • @Timjstewart
    @Timjstewart 3 года назад

    Declare knocked my socks off!

  • @shahrukhrahmankhan7860
    @shahrukhrahmankhan7860 6 лет назад

    Thanks SIR!

  • @ingeborgschmidt-huser9299
    @ingeborgschmidt-huser9299 8 лет назад

    nice, thank you

  • @rodricbr
    @rodricbr 2 года назад

    perfect

  • @Spaceman-si9cs
    @Spaceman-si9cs 8 лет назад

    thanks.

  • @rashie
    @rashie Год назад

    👍👍

  • @projectivemotion
    @projectivemotion 8 лет назад +9

    I found this video extremely useful. I am creating a cheatsheet based on the commands from this talk as practice and for future reference. You can find it on gist.github.com/projectivemotion/dc6f9b4e6241910c3d5c026a84988b7b

  • @Anu-vp9um
    @Anu-vp9um 3 года назад

    🔥🔥

  • @33ro0
    @33ro0 4 года назад +1

    Holy shit

  • @potowogreedo
    @potowogreedo 5 лет назад

    Great presentation. Although his delivery is just like the comedian Steven Wright, which is funny, because he isn't.

  • @___auburn___
    @___auburn___ 4 года назад

    This is why people hate Linux. On the other hand this is why nerds love Linux! :)

  • @Vogel42
    @Vogel42 5 лет назад

    cd HAS a man page

  • @EmperorTerran
    @EmperorTerran 8 лет назад +3

    It's so sad to see GNU/Linux infection splitting through community. Hearing it being pronounced GNU/Linux feels so cringeworthy. What exactly do these people see is the benefit that they are bringing to the table to the world? I can't think of anything other than some salute a recognition towards GNU and FSF? I do respect them, but I do not respect their attempt to change what most world knows as Linux to some cumbersome GNU/Linux.

    • @jamespannacciulli3029
      @jamespannacciulli3029  8 лет назад +7

      +EmperorTerran Tell us how you really feel. But seriously, why so sad about my having used the more complete, more accurate name for the OS? Although I do tend to casually refer to the OS as "Linux", I understand that this is taking a shortcut at the expense of somewhat misrepresenting the OS. It is actually ironic that I take this shortcut, as I am primarily interested in running a GNU OS, whether it were GNU/Linux, GNU/Herd, or GNU with some other free software licensed kernel. On the other side of that coin, I expect we should continue to see more OS's made combining the Linux kernel with non-GNU core libraries and programs, in which case the distinction between GNU/Linux and Linux without GNU, such as Android, becomes much more important.
      If I am giving a talk, I'll at least refer to the OS officially by what I consider to be its proper name, even if I may use the name "Linux" colloquially. Of course, I recognize that referring to it in this specific manner is also an implicit advertisement for the GNU project, and I definitely approve that message.

    • @lotsarats
      @lotsarats 7 лет назад +1

      i am happy to hear 'GNU' such that i understand where i can use syntax/info as presented here. and delighted we have so many choices of distros which has made using this term is necessary

    • @michaelvivirito
      @michaelvivirito 5 лет назад

      I just use freebsd. much better :)

  • @dderudito
    @dderudito 4 года назад +1

    "advanced"

    • @ChillerDragon
      @ChillerDragon 4 года назад +2

      Yea i would also consider most of it basic but some things were still new to me :)

    • @bitti1975
      @bitti1975 3 года назад

      He had to go through the basics, but it got advanced towards the end and some stuff was new to me.