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I am trying to find all the files (ending with .c,.h and .java) that are in a folder or its subdirectories beginning with "new-". This is my current command: ls -R | egrep '.[.]c$|.[.]h$|.*[.]java$' What should I change?

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    You should change the question title to something more specific to your problem. :) Do not parse ls, use find. – Kamil Maciorowski Nov 30 '17 at 17:28
  • Does "new-" refer to to files to be found? or subdirectories to be searched? – Kamil Maciorowski Nov 30 '17 at 17:39
  • It's the first time I'm using this site :) It is requested that I use ls. It applies to subdirectories. – Kostakis Nov 30 '17 at 17:43
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    Please provide some example file paths that you want to locate. – Daniel B Nov 30 '17 at 17:47
  • Which of these directories would be valid places for the files you want to find? ./, ./new-a/, ./new-a/foo/, ./bar/new-b/, ./bar/new-b/baz/ – Kamil Maciorowski Nov 30 '17 at 18:09
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Use find with -o (or operand) and (escaped) parentheses:

find $dir \( -name 'new*.java' -o -name 'new*.c' \)

Technically the parentheses aren't required unless you add other filters.

You can also use a regexp:

find . -regextype egrep -regex '.*/new-.*\.(java|c)'

(the regexp should match the full path, hence the .*/ at the start.

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It's kind of ugly, but this would output each file extension you wanted in your current directory and it's sub-directories

find . -type f -name '*.c' && find . -type f -name '*.h' && find . -type f -name '*.java'

EDIT:

If you have to use ls then this might be what you are looking for:

ls | grep -r '*.c\|*.h\|*.java' | grep new-*
  • Thank you! But I need to use ls and the subdirectories have to start with "new-" – Kostakis Nov 30 '17 at 17:47
  • I updated my comment for doing it with ls, but its typically better to use find – Pythonic Nov 30 '17 at 18:12

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