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can someone steer me in the right direction. I have 2GB worth of images, which include 3 types. Eg:

  • thumb-12345.jpg
  • popup-12345.jpg
  • 12345.jpg

Is there a quick script/command I could run to remove all the files which do not have 'thumb' or 'popup' in the name. Basically - I just need to remove the '12345.jpg'

Quite new to this, any help would be appreciated! Cheers

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2 Answers 2

up vote 5 down vote accepted

In all the snippets below, run the command to check if the files it displays are really the ones you want to delete. Then perform the deletion by replacing echo with rm or -print with -delete

If all your files are in the same directory, you can remove the ones whose name starts with a digit.

echo [0-9]*.jpg

If your files live in a directory hierarchy, use find.

find . -name '[0-9]*.jpg' -print

If you specifically want to match popup and thumb and no other prefix:

find . -name '*.jpg' \( -name 'popup-*' -o -name 'thumb-*' -o -print \)

In bash ≥4.0 or zsh, there's a simpler way to traverse subdirectories, as long as you don't run into a command line length limitation. In bash, first run shopt -s globstar. Then:

echo **/[0-9]*.jpg
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errr My snippets don't delete any data. I hate to bug you but I really really seldom give out something that deletes data without asking. (At least not unless someone really deserves that) –  Server Horror Sep 18 '11 at 14:10
    
@ServerHorror Er, yes? We're on the same page then, my snippets don't delete data either. –  Gilles Sep 18 '11 at 14:20
    
You hit me on a sensitive topic with your first paragraph -- nothing to worry about :) –  Server Horror Sep 18 '11 at 14:40

Haha more than one way and less processes :)

Start by finding what you want to keep:

find -E . -type f -regex '.*((popup)|(thumb))-[[:digit:]]*\.jpg' 

Negate the expression:

find -E . -type f \! -regex '.*((popup)|(thumb))-[[:digit:]]*\.jpg' 

Works for your sample data....

If you're satisfied add a -delete.

Read up on it in re_format(3) and find(1) to know which options to apply so that your find understands extended regular expressions

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