This guide describe howto setup and basic configure of SNMP on a RedHat Enterprise Linux or CEntOS. Perhaps it may work on many other systems.

1. Setup
Run from shell command yum install net-snmp-utils

[root@server tmp]# yum install net-snmp-utils
Loading "fastestmirror" plugin
Loading "dellsysidplugin" plugin
...
...
Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
 net-snmp-utils          i386       1:5.3.1-24.el5_2.2  updates           182 k
Installing for dependencies:
 net-snmp                i386       1:5.3.1-24.el5_2.2  updates           698 k

Transaction Summary
=============================================================================
Install      2 Package(s)
Update       0 Package(s)
Remove       0 Package(s)

Total download size: 879 k
Is this ok [y/N]: y
Answer y

Downloading Packages:

(1/2): net-snmp-utils-5.3 100% |=========================| 182 kB    00:02
(2/2): net-snmp-5.3.1-24. 100% |=========================| 698 kB    00:06
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
 Installing: net-snmp                     ######################### [1/2]
  Installing: net-snmp-utils               ######################### [2/2]
Installed: net-snmp-utils.i386 1:5.3.1-24.el5_2.2
Dependency Installed: net-snmp.i386 1:5.3.1-24.el5_2.2
Complete!

Now it is installed

2. Configure
Be careful and make a backup of the orginal snmpd config file.

[root@server ~]# mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.org

Create a new config file.

[root@server ~]# vi /etc/snmp/snmpd.conf

rocommunity  public
syslocation  "Vienna, Server Location"
syscontact  hostmaster@serverstem WWW24.at ( Enter a real email adress )


3. Finally the Test
Start the snmpd service

[root@server ~]# /etc/init.d/snmpd startDo a snmpwalk to make sure it is working

if you get an output , you hav done well and it is working

Finally, make sure that snmpd starts next time you restart your machine.

[root@server ~]# chkconfig snmpd on