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b0rk's profile
🔎Julia Evans🔍
🔎Julia Evans🔍
 🔎Julia Evans 🔍
@b0rk

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 🔎Julia Evans 🔍

@b0rk

programming and exclamation marks. she/her. ♥ @recursecenter, @bangbangcon

Montreal
jvns.ca
Joined June 2007

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     🔎Julia Evans 🔍‏ @b0rk May 25

    a few bash trickspic.twitter.com/Cmi3HcvCZ6

    7:55 PM - 25 May 2018
    • 5,058 Retweets
    • 15,925 Likes
    • Yog Mehta Gustavo Franco Gani Mendoza John Cato 🚀Sollevarsi SOCIAL Wladimir Plagges (ó_O) le Cram SyllaBear
    225 replies 5,058 retweets 15,925 likes
      1. New conversation
      2. Isaac Hepworth‏ @isaach May 25
        Replying to @b0rk

        today i learned that commands starting with a space don't go into your history. amazing!

        15 replies 11 retweets 220 likes
      3.  🔎Julia Evans 🔍‏ @b0rk May 25
        Replying to @isaach

        I’m so glad :D

        3 replies 0 retweets 23 likes
      4. Isaac Hepworth‏ @isaach May 25
        Replying to @b0rk

        also: i miss you. hope you're doing well.

        1 reply 0 retweets 6 likes
      5.  🔎Julia Evans 🔍‏ @b0rk May 25
        Replying to @isaach

        I am! I feel lucky that I got to work with you :))

        1 reply 0 retweets 7 likes
      6. Andrew Humphrey‏ @andrewjhumphrey May 25
        Replying to @b0rk @isaach

        Be a little careful it depends on the value of the HISTCONTROL env var being set right.

        2 replies 0 retweets 25 likes
      7. Alexander Mikhailian‏ @zadolballi May 26
        Replying to @andrewjhumphrey @b0rk @isaach

        And it is not set right in many distros nowadays.

        0 replies 0 retweets 0 likes
      8. End of conversation
      1. New conversation
      2. Kevin Boyd‏ @Beryllium9 May 25
        Replying to @b0rk

        There’s probably a dozen ways to solve this Q (I’d normally use sed), but for the lower left example I’m pretty sure the resulting filename would be image.png.jpg. Is there a better way than sed to replace the extension instead of adding it? Or can convert natively do it?

        6 replies 0 retweets 1 like
      3.  🔎Julia Evans 🔍‏ @b0rk May 25
        Replying to @Beryllium9

        yeah you can do this weird thing where bash does the substitution! ${i/png/jpg/} or something

        3 replies 1 retweet 34 likes
      4. Racter‏ @racter May 26
        Replying to @b0rk @Beryllium9

        Or ${i%png}jpg

        1 reply 0 retweets 11 likes
      5. William Eichin‏ @BillEichin May 26
        Replying to @racter @b0rk @Beryllium9

        Also 'basename'

        2 replies 0 retweets 4 likes
      6. Racter‏ @racter May 26
        Replying to @BillEichin @b0rk @Beryllium9

        Basename would need $(), so it'll spawn a costly subshell

        1 reply 0 retweets 3 likes
      7. William Eichin‏ @BillEichin May 26
        Replying to @racter @b0rk @Beryllium9

        I'm a sysadmin. Shells are my currency. I'll spend them as I like.

        2 replies 3 retweets 26 likes
      8. Thunder_Chicken‏ @Thunder_Chicken May 26
        Replying to @BillEichin @racter and

        Brute force isn’t always bad.

        0 replies 0 retweets 0 likes
      9. End of conversation
      1. New conversation
      2. Star Simpson‏ @starsandrobots May 25
        Replying to @b0rk

        the !! thing is why I love aliasing sudo to "please" then if I forget to run sudo $ rm file.png Permission denied I can type $ please !! and it works :D

        11 replies 105 retweets 536 likes
      3. Robin Lauren‏ @RobinLauren May 26
        Replying to @starsandrobots @b0rk

        Yay! I always found some of the Unix lingo a bit aggressive, like killing processes and slave devices. By aliasing please as sudo, you can both be polite, as in "please make sandwich", or desperate, as in "please !!"

        0 replies 1 retweet 6 likes
      4. End of conversation
      1. New conversation
      2. Kissinger's Phylactery‏ @BonusEruptus May 25
        Replying to @b0rk

        Throw this in your .inputrc, and you can start typing a command, and arrow keys will navigate your history, only showing entries that start with what you've typed so far: "\e[A": history-search-backward "\e[B": history-search-forward "\e[C": forward-char "\e[D": backward-char

        2 replies 5 retweets 38 likes
      3. Allen Goodman‏ @0x00B1 May 25
        Replying to @BonusEruptus @b0rk

        Wow. Awesome. Thanks!

        1 reply 0 retweets 1 like
      4. Amir Rachum‏ @AmirRachum May 25
        Replying to @0x00B1 @BonusEruptus @b0rk

        And in blog form:https://amir.rachum.com/blog/2013/01/15/making-history-with-bash/ …

        0 replies 0 retweets 10 likes
      5. End of conversation
      1. New conversation
      2. Barry Rowlingson, Esq.‏ @geospacedman May 26
        Replying to @b0rk

        !! and its ilk are a bit dangerous since you don't get a chance to confirm what's about to happen. My fave new bashism is Ctrl-x Ctrl-e which opens an editor and then runs when you save and quit.

        6 replies 0 retweets 20 likes
      3. Paul Martin‏ @MobiusHorizons May 26
        Replying to @geospacedman @b0rk

        I appreciate zsh's behavior where it just creates the correct command from !!, And doesn't execute immediately. Is there a way to make bash do that?

        1 reply 1 retweet 5 likes
      4. Barry Rowlingson, Esq.‏ @geospacedman May 26
        Replying to @MobiusHorizons @b0rk

        shopt -s histverify

        0 replies 0 retweets 8 likes
      5. End of conversation

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