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I want to archive files (with tar) which are below 3 MB in size. But I also want to retain the directories in which those files exist. (so I cannot use find command). I just want to avoid the files which are above 3 MB in size. How can this be done?

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So why can't you use find again? – Ignacio Vazquez-Abrams Feb 8 '11 at 6:28
    
Can the find command keep the directories intact? – nixnotwin Feb 8 '11 at 6:48
up vote 11 down vote accepted

Simpler than you think:

$ tar cf small-archive.tar /big/tree --exclude-from <(find /big/tree -size +3M)

On a semi-related note (relating to your statement that you can't use find) to get a listing of all files (including directories) under a path minus files larger than 3MiB, use:

$ find . -size -3M -o -type d

You could then do:

$ tar cf small-archive.tar --no-recursion --files-from <(find /big/tree -size -3M -o -type d)

But I'd prefer the first one as it's simpler, clearly expresses what you want and will lead to less surprises.

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1  
+1 What! A polite, friendly person on SF?!? – Jongosi Oct 8 '14 at 21:21
    
+1 same sediments. too many egotistic trolls on SF lately. – duckx Apr 26 at 21:46
    
*sentiments :P :) – MikeyB Apr 27 at 18:50

If the filename contains square brackets, in some systems, need to exclude explicitly. For example

$ mkdir test
$ echo "abcde123456" > ./test/a[b].txt
$ echo "1" > ./test/a1.txt
$ ls -la ./test
total 16
drwxrwxr-x 2 user user 4096 Jan 10 16:38 .
drwx------ 4 user user 4096 Jan 10 16:38 ..
-rw-rw-r-- 1 user user    2 Jan 10 16:38 a1.txt
-rw-rw-r-- 1 user user   12 Jan 10 16:38 a[b].txt
$ tar -zcvpf a.tar.gz ./test
./test/
./test/a[b].txt
./test/a1.txt
$ tar -zcvpf a3.tar.gz ./test --exclude-from <(find ./test -type f -size +3c)
./test/
./test/a[b].txt
./test/a1.txt
$ tar -zcvpf ax.tar.gz ./test --exclude-from <(find ./test -type f -size +3c) --exclude '*\[*'
./test/
./test/a1.txt
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