VMLINUX

In Raspberry Pi from version Jessie onwards the "root" login for SSH sessions (via Putty Login) has been disabled by default. It can be enabled by just editing "sshd_config" file and then restarting "ssh" service.

To start with login to raspi via ssh using the default "pi" credentials. Then elevate yourself to super user "sudo"

# sudo -i

Then edit "/etc/ssh/sshd_config" and update the field "PermitRootLogin"

# vi /etc/ssh/sshd_config

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If you are getting this error while installing Nagios Core on RaspberryPi run these commands to resolve the error and get Nagios up and running in no time. These commands wil need to be run as ROOT. You need to restart the nagios service after you carry out the changes.

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Its now possible to install latest Nagios CORE version on Raspbian by following the steps in this article. Before writing this article I Googled for the same but couldn't find a single article covering install of latest version of Nagios on RasberryPi hence this guide. It has been fully tested and working on my personal RasPi.

This guide was originally written for Ubuntu but will work for Raspbian (Debian Jessie) flavour for RasberryPi as well. It might work for all debian distros but not guranteed, you can try it out yourself.

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Wake-On-LAN (WOL) is a very useful feature if you have got a LAB at home and want to make it energy efficient. I have written a small BASH script to automate the Wake-On-LAN (WOL) procedure which can be used in an instance where there is a ESXi server which can turned on as and when required and then shutdown when not needed. Believe me it saves a lot on electric bills as the Servers are not running 24/7 and powered on only when required.

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