[root@linux squid]# /usr/sbin/squid -z
FATAL: Could not determine fully qualified hostname.  Please set 'visible_hostname'
 
Squid Cache (Version 2.4.STABLE1): Terminated abnormally.
CPU Usage: 0.060 seconds = 0.040 user + 0.020 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 298
[root@linux squid]#

#  TAG: visible_hostname
# If you want to present a special hostname in error messages, etc,
# then define this.  Otherwise, the return value of gethostname()
# will be used. If you have multiple caches in a cluster and
# get errors about IP-forwarding you must set them to have individual
# names with this setting.
#
#Default:
# none