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 basically a script written in Python that monitors server access logs and detects invalid authentication attempts. It blocks the originating IP addresses after a certain number of invalid login attempts.   Installation…

How to Use passwd and adduser on a Linux VPS

As with any Linux distributions, you need to be aware of the basic system administration concepts like authentication and configuration. It’s a wide range topic with different tools and configuration files. Here, in this tutorial, we will be exploring the tools for configuring authentication. That is, ‘passwd’ and ‘adduser’ to be precise. We will be…

How to View System Users in Linux on Ubuntu

This tutorial will introduce the basics of system administration, i.e. configuration and management of users and groups. Here, we will be discussing about viewing system users on Ubuntu. By the end of this tutorial, you will learn about the basic concepts behind user management, monitoring and authentication logging. We will be using Ubuntu 12.04 VPS…

How to Add a Swap File on an Arch Linux Cloud Server

Introduction Addition of some swap space is  a great alternative for increasing the responsiveness of your cloud server. Swap is that space of the hard drive which can be utilized for transitorily holding that information which typically reside in RAM. This results in the availability of increased RAM for your processes that are running currently. …