logrotating

What to do about the ever growing files on Oracle application server as: - default-web-access.log - server.log and more.. These files are not logrotated (OAS < 10.1.3 ) and cannot always be deleted or renamed manually on a 'normal' way, and it must be scripted to avoid extraordinary large log-files. Quite annoying, until Frits Hoogland pointed me to a standard Linux-functionality, 'logrotate'.