Mine

waste:/home/tuxito# /etc/init.d/squid start
Starting Squid HTTP proxy: squid* Creating squid spool directory structure
FATAL: Could not determine fully qualified hostname.  Please set 'visible_hostname'

Squid Cache (Version 2.6.STABLE5): Terminated abnormally.
CPU Usage: 0.008 seconds = 0.004 user + 0.004 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 0
/etc/init.d/squid: line 74:  4192 Abortado                $DAEMON -z
FATAL: Could not determine fully qualified hostname.  Please set 'visible_hostname'

Squid Cache (Version 2.6.STABLE5): Terminated abnormally.
CPU Usage: 0.016 seconds = 0.004 user + 0.012 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 0
/etc/init.d/squid: line 74:  4194 Abortado                start-stop-daemon --quiet --start --pidfile $PIDFILE --chuid $CHUID --exec $DAEMON -- $SQUID_ARGS </dev/null
 failed!