snmpdelta - Monitor delta differences in SNMP Counter values
snmpdelta [ COMMON OPTIONS ] [-Cf] [ -Ct ] [ -Cs ] [ -CS ] [ -Cm ] [ -CF configfile ] [ -Cl ] [ -Cp period ] [ -CP Peaks ] [ -Ck ] [ -CT ] AGENT OID [ OID ... ]
snmpdelta will monitor the specified integer valued OIDs, and report changes over time. AGENT identifies a target SNMP agent, which is instrumented to monitor the given objects. At its simplest, the AGENT specification will consist of a hostname or an IPv4 address. In this situation, the command will attempt communication with the agent, using UDP/IPv4 to port 161 of the given target host. See snmpcmd(1) for a full list of the possible formats for AGENT. OID is an object identifier which uniquely identifies the object type within a MIB. Multiple OIDs can be specified on a single snmpdelta command.
COMMON OPTIONS Please see snmpcmd(1) for a list of possible values for COMMON OPTIONS as well as their descriptions. -Cf Don't fix errors and retry the request. Without this option, if multiple oids have been specified for a single request and if the request for one or more of the oids fails, snmpdelta will retry the request so that data for oids apart from the ones that failed will still be returned. Specifying -Cf tells snmpdelta not to retry a request, even if there are multiple oids specified. -Ct Flag will determine time interval from the monitored entity. -Cs Flag will display a timestamp. -CS Generates a "sum count" in addition to the individual instance counts. The "sum count" is the total of all the individual deltas for each time period. -Cm Prints the max value ever attained. -CF configfile Tells snmpdelta to read it's configuration from the specified file. This options allows the input to be set up in advance rather than having to be specified on the command line. -Cl Tells snmpdelta to write it's configuration to files whose names correspond to the MIB instances monitored. For example, snmpdelta -Cl localhost ifInOctets.1 will create a file "localhost-ifInOctets.1". -Cp Specifies the number of seconds between polling periods. Polling constitutes sending a request to the agent. The default polling period is one second. -CP peaks Specifies the reporting period in number of polling periods. If this option is specified, snmpdelta polls the agent peaks number of times before reporting the results. The result reported includes the average value over the reporting period. In addition, the highest polled value within the reporting period is shown. -Ck When the polling period (-Cp) is an increment of 60 seconds and the timestamp is displayed in the output (-Cs), then the default display shows the timestamp in the format hh:mm mm/dd. This option causes the timestamp format to be hh:mm:ss mm/dd. -CT Makes snmpdelta print its output in tabular form. -Cv vars/pkt Specifies the maximum number of oids allowed to be packaged in a single PDU. Multiple PDUs can be created in a single request. The default value of variables per packet is 60. This option is useful if a request response results in an error because the packet is too big. Note that snmpdelta REQUIRES an argument specifying the agent to query and at least one OID argument, as described in the snmpcmd(1) manual page.
$ snmpdelta -c public -v 1 -Cs localhost IF-MIB::ifInUcastPkts.3 IF-MIB::ifOutUcastPkts.3 [20:15:43 6/14] ifInUcastPkts.3 /1 sec: 158 [20:15:43 6/14] ifOutUcastPkts.3 /1 sec: 158 [20:15:44 6/14] ifInUcastPkts.3 /1 sec: 184 [20:15:44 6/14] ifOutUcastPkts.3 /1 sec: 184 [20:15:45 6/14] ifInUcastPkts.3 /1 sec: 184 [20:15:45 6/14] ifOutUcastPkts.3 /1 sec: 184 [20:15:46 6/14] ifInUcastPkts.3 /1 sec: 158 [20:15:46 6/14] ifOutUcastPkts.3 /1 sec: 158 [20:15:47 6/14] ifInUcastPkts.3 /1 sec: 184 [20:15:47 6/14] ifOutUcastPkts.3 /1 sec: 184 [20:15:48 6/14] ifInUcastPkts.3 /1 sec: 184 [20:15:48 6/14] ifOutUcastPkts.3 /1 sec: 184 [20:15:49 6/14] ifInUcastPkts.3 /1 sec: 158 [20:15:49 6/14] ifOutUcastPkts.3 /1 sec: 158 ^C $ snmpdelta -c public -v 1 -Cs -CT localhost IF-MIB:ifInUcastPkts.3 IF-MIB:ifOutcastPkts.3 localhost ifInUcastPkts.3 ifOutUcastPkts.3 [20:15:59 6/14] 184.00 184.00 [20:16:00 6/14] 158.00 158.00 [20:16:01 6/14] 184.00 184.00 [20:16:02 6/14] 184.00 184.00 [20:16:03 6/14] 158.00 158.00 [20:16:04 6/14] 184.00 184.00 [20:16:05 6/14] 184.00 184.00 [20:16:06 6/14] 158.00 158.00 ^C The following example uses a number of options. Since the Cl option is specified, the output is sent to a file and not to the screen. $ snmpdelta -c public -v 1 -Ct -Cs -CS -Cm -Cl -Cp 60 -CP 60 interlink.sw.net.cmu.edu .220.127.116.11.18.104.22.168.1.16.3 .22.214.171.124.126.96.36.199.1.16.4
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.