How to Create Nagios Plugins With Perl On Ubuntu 12.10

Introduction Nagios is an open source monitoring software application that helps organizations to prevent IT infrastructure problems. It can be used with Linux as well as other Unix variants. In this tutorial, you will learn how to create Nagios plugins with Perl. Here, I will be using Ubuntu 12.10. Initial Set Up Before getting into…

How to Copy Files With Rsync Over SSH

Introduction   Rsync is a software utility which is very handy for synchronizing files and directories over different locations with minimized data transfer. It is used to  copy files recursively with compression and over encrypted channels. We are going to copy files using rsync over SSH in  this tutorial.   Generate Public SSH Keys  …

How to Install DenyHosts on CentOS 6

Introduction DenyHosts is a log-based intrusion prevention security tool intended to be run by Linux administrators to prevent SSH server attacks. It is a  script which is  written in Python that monitors server access logs and detects invalid authentication attempts. It can block the originating IP addresses after a certain number of invalid login attempts.  …