How would you like automate the transfer of documents between servers ?
Say, for example, one of your servers collected daily news documents and you wanted to make these available to one of your customers on a separate box. Quite often sites request documents from remote sources and the pages take an age to load because of the usual internet traffic clog and poor bandwidth.
The way around this is to have the document available locally. This requirement comes up quite often in web projects, and in fact is very easy to do with a shell script automated by a cron job. Click read more for the script.