R71 IT Blog

Nagios: install check_oracle_health plugin

Nagios: install check_oracle_health plugin 150 150 Roderick Derks

Introduction In our example scenario, we are testing against “Oracle Database 11g Express Edition”, however the monitoring should be uniform across all Oracle database platforms. Our Opsview server is running on Ubuntu 10.04 32-bit, however this document can be altered to fit RHEL/CentOS/SLES etc and also 32/64 bit with some slight changes.

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VMware guest Centos 6 does not shutdown

VMware guest Centos 6 does not shutdown 150 150 Roderick Derks

Shutting down the guest OS Centos 6 (I used 6.2) results in a shutdown of the OS but the actual VM does not shutdown. # shutdown -h 0 Tried to activate the ACPI module in the kernel by editing the grub.conf file and this worked! # vi /boot/grub/grub.conf

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Centos 6.2 minimal install kickstart file

Centos 6.2 minimal install kickstart file 150 150 Roderick Derks

I use this kickstart file to install Centos 6.2 with a minimal install, SELinux disabled and uninstalled, 1GB of swap space on a 20GB drive.

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Cloned Red Hat/CentOS/Scientific Linux Virtual Machines and “Device eth0 does not seem to be present” Message

Cloned Red Hat/CentOS/Scientific Linux Virtual Machines and “Device eth0 does not seem to be present” Message 150 150 Roderick Derks

Ran into this a couple of times, found a solution descibed by Aaron Walrath and I copied it here as a note myself. Thnx to Aaron for this great article.

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Centreon Database Management

Centreon Database Management 150 150 Roderick Derks

Some quick SQL statements. This info is unstructured uptil now, got to make a readable article so bear with me.

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wget recursively downloading files

wget recursively downloading files 150 150 Roderick Derks

# wget -r -np -nH –cut-dirs=3 -R index.html http://hostname/aaa/bbb/ccc/ddd/ -r -np -nH –cut-dirs=3 -R index.htm recursive not uploading files from higher directories not using hostname as the root download folder omitting first 3 folders aaa, bbb, ccc excluding index.html files  

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Centreon Weathermap module

Centreon Weathermap module 150 150 Roderick Derks

Install Weathermap cd /tmp wget http://www.network-weathermap.com/files/php-weathermap-0.97a.zip

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Centos Nagios Centreon Kickstart

Centos Nagios Centreon Kickstart 150 150 Roderick Derks

Centos 5.6 x86. Easily adjustable for 64-x86 Ready for Compact Flashcard in a Nagios Satellite Ready for testing on a VMware Virtual Machine (you would normally use a 64 bit OS in a VM.

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autossh init script

autossh init script 150 150 Roderick Derks

Enjoy this script that will help you to initiate SSH connections automatically.

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Kill multiple Linux processes one command

Kill multiple Linux processes one command 150 150 Roderick Derks

ps ax | grep {PROCESSNAME} | grep -v grep kill -9 `ps ax | grep {PROCESSNAME} | grep -v grep|awk '{print $1}'`

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Reverse SSH tunnel

Reverse SSH tunnel 150 150 Roderick Derks

Have you ever wanted to ssh to your Linux box that sits behind NAT? Now you can with reverse SSH tunneling. These steps will show you the concept and how to set up reverse SSH tunneling. The reverse SSH tunneling should work fine with Unix like systems.

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Centreon: add a poller

Centreon: add a poller 150 150 Roderick Derks

Steps to take (some are very specific for me and will not work for everyone):

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