Ubuntu 14.04
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Cacti : Add Monitoring Host2016/01/17

Add Monitoring Target Host on the network.
[1] Install SNMP on the target host you'd like to monitor.
apt-get -y install snmp snmpd snmp-mibs-downloader
vi /etc/snmp/snmp.conf
# line 4: comment out

mibs :
vi /etc/snmp/snmpd.conf
# line 15: comment out

agentAddress udp:
# line 17: uncomment

agentAddress udp:161,udp6:[::1]:161
# line 49: uncomment and change to any comunity name you like

# line 51: comment out

rocommunity public default -V systemonly
# line 57: uncomment and change to any comunity name & change access permission

/etc/init.d/snmpd restart

* Restarting network management services:
# validation (replace "Serverworld" to the comunity name you set)

snmpwalk -v 2c -c Serverworld localhost system

SNMPv2-MIB::sysDescr.0 = STRING: Linux dlp.srv.world 3.13.0-74-generic 
#118-Ubuntu SMP Thu Dec 17 22:52:10 UTC 2015 x86_64
SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (18674) 0:03:06.74
SNMPv2-MIB::sysORUpTime.9 = Timeticks: (0) 0:00:00.00
SNMPv2-MIB::sysORUpTime.10 = Timeticks: (0) 0:00:00.00
[2] Login to Cacti admin site and click "Devices" on the left menu.
[3] Click "Add" in the right pane.
[4] Input items like follows and click "Create" button.
Description ⇒ simply description
Hostname ⇒ target's hostname or IP address
Host Template ⇒ ucd/net SNMP Host
SNMP Comunity ⇒ the comunity name you set in [1]
[5] After saving settings, click "Graph Trees" on the left menu and click "Default Tree" in the right pane.
[6] Click "Add" in the right pane.
[7] Select "Host" in "Tree Item Type" field and select target Host in "Host" field and then click "Create" button.
[8] Click "Save" button.
[9] Click "New Graphs" on the left menu and select graphs you'd like to add in the right pane and then click "Create" button.
[10] After few minutes later, move to the "graphs" tab to view the system status to select the new target host on the left menu like follows.
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