Delete files with time stamp on Samba Server

[Leslie Jensen]

I have a remote Samba Server where Windows machines place backup files 
once a day. The format is


backup_2013-05-03_13.45.44_.zip


Before the Windows client places the file it removes the file from the 
day before.

In turn I do a backup of the backup files once every week(Friday) to 
another directory.

This directory will eventually fill up and I need to make a check and 
remove the oldest file maybe once a week before the new file is copied, 
or put in other words I never want more than 4 files to be in this 
directory.

My scripting skills are not at the level where I can figure this out, so 
I'll appreciate suggestions on how to solve this in the correct way.


Thanks :-)


/Leslie