Here are some realistic examples of running fileschanged.
Try the command fileschanged -r ~/ . Using this command you can monitor all of the files in your home directory and below. The -r means to monitor subdirectories of any specified directories.
/home/ben/.xsession-errors
/home/ben/mbox
In this example, two files were altered in my (Ben's) home directory after the fileschanged command was executed. When my mbox file changes, I know I have mail. When my .xsession-file changes I know that something has gone wrong with X, or there are some warnings that I want to know about. fileschanged will continue to run until you interrupt it by pressing CTRL-C.