R71 IT Blog

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.

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

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.

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.

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

# 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  

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

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.

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

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

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.

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