# 2013-11-04 Get SNMP(v3) working on Ubuntu 12.04 I am running an Ubuntu 12.04 as working environment on my local machine. Ubuntu 12.04 is latest LTS (Long Term Support) version so that it's a good choice for a server. I need to install SNMP on my machine recently and I install it by following command ``` sudo apt-get install snmpd snmp ``` However it seems doesn't work. After checking the system log, I found the following errors in `/var/log/syslog` ``` snmpd[8461]: /etc/snmp/snmpd.conf: line 90: Error: Already have an entry for this process. snmpd[8461]: /etc/snmp/snmpd.conf: line 92: Error: Already have an entry for this process. snmpd[8461]: /etc/snmp/snmpd.conf: line 94: Error: Already have an entry for this process. snmpd[8461]: /etc/snmp/snmpd.conf: line 106: Error: includeAllDisks already specified. snmpd[8461]: /etc/snmp/snmpd.conf: line 106: Error: #011ignoring: includeAllDisks 10% snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: /etc/snmp/snmpd.conf: line 146: Error: duplicate trigger name snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: /etc/snmp/snmpd.conf: line 146: Error: duplicate trigger name snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: /etc/snmp/snmpd.conf: line 146: Error: duplicate trigger name snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: /etc/snmp/snmpd.conf: line 146: Error: duplicate trigger name snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: /etc/snmp/snmpd.conf: line 146: Error: duplicate trigger name snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: /etc/snmp/snmpd.conf: line 146: Error: duplicate trigger name snmpd[8461]: error on subcontainer '' insert (-1) snmpd[8461]: /etc/snmp/snmpd.conf: line 146: Error: duplicate trigger name snmpd[8461]: /etc/snmp/snmpd.conf: line 148: Error: duplicate trigger name snmpd[8461]: /etc/snmp/snmpd.conf: line 148: Error: duplicate trigger name snmpd[8461]: duplicate table data attempted to be entered. row exists snmpd[8461]: Failed to register extend entry 'test1' - possibly duplicate name. snmpd[8461]: duplicate table data attempted to be entered. row exists snmpd[8461]: Failed to register extend entry 'test2' - possibly duplicate name. snmpd[8461]: Turning on AgentX master support. snmpd[8461]: Error opening specified endpoint "udp:127.0.0.1:161" snmpd[8461]: Server Exiting with code 1 ``` The content of `/etc/snmp/snmpd.conf` is like ``` 89 # At least one 'mountd' process 90 proc mountd 91 # No more than 4 'ntalkd' processes - 0 is OK 92 proc ntalkd 4 93 # At least one 'sendmail' process, but no more than 10 94 proc sendmail 10 1 95 96 # Walk the UCD-SNMP-MIB::prTable to see the resulting output 97 # Note that this table will be empty if there are no "proc" entries in the snmpd.conf file 98 99 100 # 101 # Disk Monitoring 102 # 103 # 10MBs required on root disk, 5% free on /var, 10% free on all other disks 104 disk / 10000 105 disk /var 5% 106 includeAllDisks 10% 145 # generate traps on UCD error conditions 146 defaultMonitors yes 147 # generate traps on linkUp/Down 148 linkUpDownNotifications yes 149 150 ``` So let's fix the problem. I comment the snmpd.conf configurations appeared in syslog, then use command `cat /etc/snmp/snmpd.conf | grep -v '#' | grep -v '^\s*$'` to get a clean version. ``` view systemonly included .1.3.6.1.2.1.1 view systemonly included .1.3.6.1.2.1.25.1 rocommunity public default -V systemonly rouser authOnlyUser sysLocation Sitting on the Dock of the Bay sysContact Me sysServices 72 disk / 10000 disk /var 5% load 12 10 5 trapsink localhost public iquerySecName internalUser rouser internalUser master agentx createUser testuser MD5 "testpasswd" rouser testuser auth ``` After updated `/etc/snmpd/snmpd.conf` and `/etc/init.d/snmpd restart`, now it's working. ``` $ snmpwalk -v 3 -l authNoPriv -a MD5 -u testuser -A testpasswd 127.0.0.1:161 sysDescr SNMPv2-MIB::sysDescr.0 = STRING: Linux simon-desktop 3.9.3-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 ``` BTW, The [i3](http://i3wm.org) is the best tiling window manager I have ever used. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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