$ 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 1.3.6.1.2.1.1SNMPv2-MIB::sysDescr.0 = STRING: Linux neo.example.org 2.6.17-10-server #2 SMP Tue Dec 5 22:29:32 UTC 2006 i686SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (120146) 0:20:01.46SNMPv2-MIB::sysContact.0 = STRING: Root 
     
       (configure /etc/snmp/snmpd.local.conf)SNMPv2-MIB::sysName.0 = STRING: neo.example.orgSNMPv2-MIB::sysLocation.0 = STRING: Unknown (configure /etc/snmp/snmpd.local.conf)SNMPv2-MIB::sysORLastChange.0 = Timeticks: (18) 0:00:00.18SNMPv2-MIB::sysORID.1 = OID: IF-MIB::ifMIBSNMPv2-MIB::sysORID.2 = OID: SNMPv2-MIB::snmpMIBSNMPv2-MIB::sysORID.3 = OID: TCP-MIB::tcpMIBSNMPv2-MIB::sysORID.4 = OID: IP-MIB::ipSNMPv2-MIB::sysORID.5 = OID: UDP-MIB::udpMIBSNMPv2-MIB::sysORID.6 = OID: SNMP-VIEW-BASED-ACM-MIB::vacmBasicGroupSNMPv2-MIB::sysORID.7 = OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBComplianceSNMPv2-MIB::sysORID.8 = OID: SNMP-MPD-MIB::snmpMPDComplianceSNMPv2-MIB::sysORID.9 = OID: SNMP-USER-BASED-SM-MIB::usmMIBComplianceSNMPv2-MIB::sysORDescr.1 = STRING: The MIB module to describe generic objects for network interface sub-layersSNMPv2-MIB::sysORDescr.2 = STRING: The MIB module for SNMPv2 entitiesSNMPv2-MIB::sysORDescr.3 = STRING: The MIB module for managing TCP implementationsSNMPv2-MIB::sysORDescr.4 = STRING: The MIB module for managing IP and ICMP implementationsSNMPv2-MIB::sysORDescr.5 = STRING: The MIB module for managing UDP implementationsSNMPv2-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) 0:00:00.12SNMPv2-MIB::sysORUpTime.2 = Timeticks: (12) 0:00:00.12SNMPv2-MIB::sysORUpTime.3 = Timeticks: (12) 0:00:00.12SNMPv2-MIB::sysORUpTime.4 = Timeticks: (12) 0:00:00.12SNMPv2-MIB::sysORUpTime.5 = Timeticks: (12) 0:00:00.12SNMPv2-MIB::sysORUpTime.6 = Timeticks: (12) 0:00:00.12SNMPv2-MIB::sysORUpTime.7 = Timeticks: (18) 0:00:00.18SNMPv2-MIB::sysORUpTime.8 = Timeticks: (18) 0:00:00.18SNMPv2-MIB::sysORUpTime.9 = Timeticks: (18) 0:00:00.18End of MIBnetkiller@neo:/etc/snmp$ snmpget -v 1 -c public localhost sysDescr.0SNMPv2-MIB::sysDescr.0 = STRING: Linux neo.example.org 2.6.17-10-server #2 SMP Tue Dec 5 22:29:32 UTC 2006 i686netkiller@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 localhostVariable: system.sysDescr.0Variable: system.sysContact.0Variable: Received Get Response from UDP: [127.0.0.1]:161->[0.0.0.0]:48968requestid 0x611A34EA errstat 0x0 errindex 0x0SNMPv2-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_64SNMPv2-MIB::sysContact.0 = STRING: Root 
     
       (configure /etc/snmp/snmp.local.conf)