Nagios check_snmp modules get error code:126 or null

The scripts outputs  can be “Can’t locate Net/SNMP.pm in @INC…..”

You don’t have Net::SNMP installed, see below;)

How do I install Net::SNMP perl module ?

There are 2 ways of doing this

1) By CPAN (best)

on command line, as root :

[your_host]# perl -MCPAN -e shell
cpan shell — CPAN exploration and modules installation (v1.76)
ReadLine support enabled
cpan> install Net::SNMP

If it’s the first time you run CPAN, it will probably ask you some (simple) questions.

CPAN will also ask you to satisfy some dependencies (Crypt::DES, Digest::MD5, etc..).

2) “By hand”

Get the folowings modules (tar.gz format) on www.cpan.org

– Crypt::DES
– Digest::MD5
– Digest::SHA1
– Digest::HMAC
– Net::SNMP

for each one (you must install Net::SNMP at the end) :
tar zxf <module>.tar.gz
cd <module>
perl Makefile.pl
make test
make install

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