Why it display the message...

brucechou

[root@mylinux root]# squid -k reconfigure
FATAL: Could not determine fully qualified hostname.  Please set 'visible_hostname'

Squid Cache (Version 2.4.STABLE7): Terminated abnormally.
CPU Usage: 0.006 seconds = 0.004 user + 0.002 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 312
Aborted