Date
Jul. 19th, 2024
 
2024年 6月 14日

Post: Remove empty directory trees

Remove empty directory trees

Published 02:05 May 17, 2024.

Created by @ezra. Categorized in #UNIX/Linux, and tagged as #UNIX/Linux, #Ubuntu Linux.

Source format: Markdown

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Suppose I have a dir tree like this:

ROOTDIR
    └--SUBDIR1
        └----SUBDIR2
            └----SUBDIR3

I am looking for a command such that when I input:

$ [unknown command] ROOTDIR

The whole dir tree can be deleted if there is no file but only dirs inside the whole tree. However, say if there is a file called hello.pdf under SUBDIR1:

ROOTDIR
    └--SUBDIR1
        └--hello.pdf
        └----SUBDIR2
            └----SUBDIR3

Then the command must only delete SUBDIR2 and below.

Well, what you need to do is this:

find . -depth -type d -empty -exec rmdir "{}" \;

That will first drill down the directory tree until it finds the first empty directory, then delete it. Thus making the parent directory empty which will then be deleted, etc. This will produce the desired effect (I do this probably 10 times a week, so I'm pretty sure it's right). :-)

# Run this to preview:
find . -depth -type d -empty -exec readlink -f "{}" \;
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