Definitions for "CHMOD"
Short for : Change Mode. A command that lets the webmaster change the permissions associated with a file or directory on a UNIX system. See also our Script Installation FAQ
To change the permissions for a file
CHMOD is to do with the files on your server. It's complicated at first, but something that's important and that will need to be learnt prior to setting up most web scripts. The best thing to do is to take a look at this tutorial: CHMOD Tutorial - which has an in-depth look at what it is, and how to do it.