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This is a list of the more commonly used monitors which form NOCOL.
Monitor: What it monitors
apcmon:   APC Smart UPSs
armon:    Appletalk routing tables
bgpmon:   BGP processes on Cisco routers
bpmon:    bootp service monitor
ciscomon: Cisco routers (CPU usage, airflow etc.)
hostmon:  Unix host conditions (CPU usage, disk space, load etc.)
ippingmon:        Whether a host is responding to TCP/IP pings
modemmon: Modem line usage on Cisco terminal servers
novellmon:        Novell service monitor
nrmon:    Novell routing tables
nsmon:    Name servers (DNS)
ntpmon:   NTP servers
rpcpingmon:       RPC portmapper on hosts
snmpmon:  SNMP data on hosts
syslogmon:        Log files for specified expressions
tpmon:	Network throughput