$ snmpwalk -c public -v2c 172.16.1.10 hrSWRunPerfMem | awk 'BEGIN {total_mem=0} { if ($NF == "KBytes") {total_mem=total_mem+$(NF-1)}}  END {print total_mem}'
655784
			

$ snmpwalk -c public -v 1 127.0.0.1 1.3.6.1.2.1.1

			
netkiller@neo:/etc/snmp$ snmpwalk -c public -v 1 127.0.0.1 1.3.6.1.2.1.1
SNMPv2-MIB::sysDescr.0 = STRING: Linux neo.example.org 2.6.17-10-server #2 SMP Tue Dec 5 22:29:32 UTC 2006 i686
SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (120146) 0:20:01.46
SNMPv2-MIB::sysContact.0 = STRING: Root <root@localhost> (configure /etc/snmp/snmpd.local.conf)
SNMPv2-MIB::sysName.0 = STRING: neo.example.org
SNMPv2-MIB::sysLocation.0 = STRING: Unknown (configure /etc/snmp/snmpd.local.conf)
SNMPv2-MIB::sysORLastChange.0 = Timeticks: (18) 0:00:00.18
SNMPv2-MIB::sysORID.1 = OID: IF-MIB::ifMIB
SNMPv2-MIB::sysORID.2 = OID: SNMPv2-MIB::snmpMIB
SNMPv2-MIB::sysORID.3 = OID: TCP-MIB::tcpMIB
SNMPv2-MIB::sysORID.4 = OID: IP-MIB::ip
SNMPv2-MIB::sysORID.5 = OID: UDP-MIB::udpMIB
SNMPv2-MIB::sysORID.6 = OID: SNMP-VIEW-BASED-ACM-MIB::vacmBasicGroup
SNMPv2-MIB::sysORID.7 = OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance
SNMPv2-MIB::sysORID.8 = OID: SNMP-MPD-MIB::snmpMPDCompliance
SNMPv2-MIB::sysORID.9 = OID: SNMP-USER-BASED-SM-MIB::usmMIBCompliance
SNMPv2-MIB::sysORDescr.1 = STRING: The MIB module to describe generic objects for network interface sub-layers
SNMPv2-MIB::sysORDescr.2 = STRING: The MIB module for SNMPv2 entities
SNMPv2-MIB::sysORDescr.3 = STRING: The MIB module for managing TCP implementations
SNMPv2-MIB::sysORDescr.4 = STRING: The MIB module for managing IP and ICMP implementations
SNMPv2-MIB::sysORDescr.5 = STRING: The MIB module for managing UDP implementations
SNMPv2-MIB::sysORDescr.6 = STRING: View-based Access Control Model for SNMP.
SNMPv2-MIB::sysORDescr.7 = STRING: The SNMP Management Architecture MIB.
SNMPv2-MIB::sysORDescr.8 = STRING: The MIB for Message Processing and Dispatching.
SNMPv2-MIB::sysORDescr.9 = STRING: The management information definitions for the SNMP User-based Security Model.
SNMPv2-MIB::sysORUpTime.1 = Timeticks: (12) 0:00:00.12
SNMPv2-MIB::sysORUpTime.2 = Timeticks: (12) 0:00:00.12
SNMPv2-MIB::sysORUpTime.3 = Timeticks: (12) 0:00:00.12
SNMPv2-MIB::sysORUpTime.4 = Timeticks: (12) 0:00:00.12
SNMPv2-MIB::sysORUpTime.5 = Timeticks: (12) 0:00:00.12
SNMPv2-MIB::sysORUpTime.6 = Timeticks: (12) 0:00:00.12
SNMPv2-MIB::sysORUpTime.7 = Timeticks: (18) 0:00:00.18
SNMPv2-MIB::sysORUpTime.8 = Timeticks: (18) 0:00:00.18
SNMPv2-MIB::sysORUpTime.9 = Timeticks: (18) 0:00:00.18
End of MIB
netkiller@neo:/etc/snmp$ snmpget -v 1 -c public localhost sysDescr.0
SNMPv2-MIB::sysDescr.0 = STRING: Linux neo.example.org 2.6.17-10-server #2 SMP Tue Dec 5 22:29:32 UTC 2006 i686
netkiller@neo:/etc/snmp$

			
			

snmpget -v 1 -c public localhost sysDescr.0

snmpwalk -v 1 -c OFcx6CvN 127.0.0.1 extEntry
			

			
# snmptest -v2c -c public localhost
Variable: system.sysDescr.0
Variable: system.sysContact.0
Variable: 
Received Get Response from UDP: [127.0.0.1]:161->[0.0.0.0]:48968
requestid 0x611A34EA errstat 0x0 errindex 0x0
SNMPv2-MIB::sysDescr.0 = STRING: Linux localhost.localdomain 3.10.0-123.20.1.el7.x86_64 #1 SMP Thu Jan 29 18:05:33 UTC 2015 x86_64
SNMPv2-MIB::sysContact.0 = STRING: Root <root@localhost> (configure /etc/snmp/snmp.local.conf)