Conversation

Notices

1. Embed this notice
   Simon Tatham (simontatham@hachyderm.io)'s status on Friday, 14-Jun-2024 14:31:11 JST Simon Tatham

   'mkdir -p' lets you make a deeply nested subdirectory like a/b/c/d, making all the intermediate directories on the way to it. So if even 'a' doesn't exist, it'll make that, then a/b, etc.

   But you can also get it to make multiple _non_-nested directories, because it accepts '..' in the path and doesn't treat it specially:

   $ mkdir -p alpha/../beta/../gamma
   $ ls
   alpha beta gamma
   $

   [Edit: to be clear, I'm pointing out an amusing edge case, not giving advice!]

   • Embed this notice
     Rev. Roger BW 😷 (rogerbw@emacs.ch)'s status on Friday, 14-Jun-2024 14:31:07 JST Rev. Roger BW 😷

     in reply to

     • Daniel Bohrer

     @daniel_bohrer It's "brace expansion" in the bash man page, and it can also do ranges: {1..9}, {a..z} etc. I'd been using bash for at least 15 years before I found out about it by chance.

   • Embed this notice
     Daniel Bohrer (daniel_bohrer@chaos.social)'s status on Friday, 14-Jun-2024 14:31:08 JST Daniel Bohrer

     in reply to

     • Rev. Roger BW 😷

     @RogerBW TIL that this is a bashism 😲
     (It's not mentioned anywhere in https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html )

     Ryan Castellucci :nonbinary_flag: repeated this.
   • Embed this notice
     Rev. Roger BW 😷 (rogerbw@emacs.ch)'s status on Friday, 14-Jun-2024 14:31:10 JST Rev. Roger BW 😷

     in reply to

     @simontatham Reminds me of my bashism for a new maildir:
     $ mkdir ~/Mail/name/{,cur,new,tmp}

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Friday, 14-Jun-2024 14:31:58 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • Daniel Bohrer
     • Rev. Roger BW 😷

     @RogerBW @daniel_bohrer It can do ranges!? I've been wrapping seq in backticks for no reason for twenty years. 😭

   • Embed this notice
     Claudius Link (realn2s@infosec.exchange)'s status on Friday, 14-Jun-2024 14:58:47 JST Claudius Link

     in reply to

     • Daniel Bohrer
     • Rev. Roger BW 😷
     • Ryan Castellucci :nonbinary_flag:

     @ryanc @RogerBW @daniel_bohrer
     Me too 😳
     (And I'm actually not sure if I'm not too old to charge that 😜)