No access to the Nagios through the browser

[hamrad]

Yes, they are still in the /tmp directory. Yes, I already made a twice all operations what you wrote: the result is same...

As you can see, this plugin is not here... It might be worth try another plug-ins build?..

[hsmith]

Can you see if this page that @box293 wrote helps you? http://www.box293.com/guides/installing-net-snmp

[Box293]

Yes, net-snmp needs to be installed first, once you've done that re-compile and install nagios-plugins.

[hamrad]

hsmith, Box293, comrades, Thank You Very Much!
I did not think that the minimal CentOS distribution will be so "castrated" ... Yes, after installing net-snmp by Box293's manual and reinstalling the nagios-plugins - check_snmp plugin appeared in the plugins directory, and a survey of services began to work correctly.
That is, it appears that installation of Net-SNMP by yum install net-snmp is insufficient... Well, I'll write it to my manual for installing!

So, once again I want to thank everyone who has given me here useful and correct advices! As wise people say: You live - and learn

[mcapra]

Glad to hear you were able to resolve this issue! Is it ok if we lock this thread and mark it as resolved?

[hamrad]

mcapra, Yes, of course, issue is resolved! Now I try to install Nagvis, but that's another story... Once again - thank you all!