My script above is to get rid of the older portion of large files while maintaining the newer portion. It could downsize when a file hits a certain number of characters instead of number of lines. Both the wc and tail commands support number of characters.

But if you just want to empty the large files, that's a lot easier. The easiest way to empty a file and leave it there is:

> myfile

and if running as root, ownership and file permissions will remain unchanged. Normally you can use the -exec parameter on a find command to do some command on each qualifying file, such as:

find . -name "test*" -exec rm {} \;

but I was not able to get the redirection command above to work in this context. But there are several ways to feed the filenames, such as piping into xargs. I would suggest the following, but test it first by replacing the "> $fn" with "echo $fn":

Code:

#!/bin/sh
for fn in `find . -size 2000`
do
> $fn
done
exit 0