The Cache provides a remote instrumentation interface, allowing you to gather statistics about many caches from a single graphical client. The instrumentation interface is implemented using Tcl/Tk [20], so you must have that software installed to use the instrumentation interface. To run the Cache Manager:
The instrumentation interface also allows caches to be shutdown remotely. To provide a measure of security, we use a simple password mechanism. For this purpose, you should add the user ``cache'' to your /etc/passwd file (or the passwd ypmap for NIS). cached will check the given password with this account when a shutdown is requested.