Unknown two line file

What is it?

[D_Blackwell]

#!/usr/bin/perl
$string=`du -h /home/domainusername/`;
print "Content-type: text/plain\n\n$string";

A file, du.pl showed up in the root directory. It has never been there before, and I didn't knowingly put it there. What is it? Should I do anything with it? ('domainusername' is the username of the domain.)

[coopster]

Well, the unix du command will summarize disk usage of each file, recursively for directories. That -h switch says to print the sizes in human readable format (i.e. 1K 76M 2G).

If you didn't put that perl script there, you might want to find out who did and why they want to view your home directory listing!

[D_Blackwell]

I've deleted the file from the server, though kept a copy for myself, and changed the password. The only other person that should have access is the owner of the company, and he would never do anything like that. I'm at a loss as to how it got there, but upload files all the time, so the addition jumped out at me. As a security matter, what should my primary concerns be at this point?

[coopster]

Did you happen to look at the owner/group of the file before you deleted it?

I get lots of hits for "kommander" when I search on that string ... you ever use that open source software and inadvertently use demo examples and somehow store a file in your root?