Sunday, 17 April 2011

Browser security

Check your browser security:
https://browsercheck.qualys.com/
http://www.surfpatrol.ru/

Monitoring systems list

Nagios tips


Plugins, addons, sites and other great stuff for Nagios:


Good plugin for check CPU:


To make it work you need to install some Perl modules:

    cpan -i Nagios::Plugin Getopt:Compact


I usually use this plugin with the fillowing parametres:


$USER1$/check_nrpe -H $HOSTADDRESS$ -c check_cpu -a -w 50 -c 80



Another plugin for checking CPU is check_cpu.sh.

It is more accurate because it produces two CPU checks, using -i (interval) option. When there is only one check, false aletrts may happen. For example, if one program occupies 100% of CPU for 2 seconds and exactly at this time Nagios checks CPU, critical alert would be sent.



Memory plugin, that I usually use:




Send SMS with gammu

~/.gammurc

[gammu]

port = /dev/ttyUSB0

model = connection = at19200

synchronizetime = yes

logfile =

logformat = nothing

use_locking =

gammuloc =



gammu sendsms text 07874454543

Ping does not work

Today I would like to discuss a banal situation: host A is directly connected to host B, ping from host A to host B does not work. What are...