OSSEC is an open-source, host-based intrusion detection system (HIDS) that performs log analysis, integrity checking, Windows registry monitoring, rootkit detection, time-based alerting, and active response. It’s the application to install on your server if you want to keep an eye on what’s happening inside it. In this tutorial you’ll learn how to install OSSEC to monitor the Fedora 21 server it is installed on: a local OSSEC installation.
Entropy is important, and haveged is an application that can provide your system with more of it.
There are three main commands, and a set of common log locations that you can use to get started troubleshooting Apache errors. Generally when you are troubleshooting Apache, you will use these commands in the order indicated here, and then examine log files for specific…
Setting up domain names can be challenging for those who are inexperienced. The “dig” command can help verify that your domain settings are correct. This is also helpful for investigating how other websites set up their domain records. This guide will introduce the basics of how to query information with dig. It will also briefly explore the “ping” and “whois” commands.
When you first log into a fresh Fedora 21 or RHEL server, it’s not ready for use as a production system. There are a number of recommended steps to take in order to customize and secure it, e.g. enabling a firewall. This tutorial will show you how to give a fresh installation of a Fedora 21 server a better security profile and be ready for use.
When you first log into a fresh Fedora 22 server, it’s not ready for use as a production system. There are a number of recommended steps to take in order to customize and secure it, e.g. enabling a firewall. This tutorial will show you how to give a fresh installation of a Fedora 22 server a better security profile and be ready for use.
This tutorial runs through the installation of GNOME and VNC on Fedora 19.
Linux can be hard work. This article was made to show the other side of Linux, where things don’t have to be so serious all of the time. Many of the people who contribute to open source projects have a great sense of humor.
There are many Linux distributions available, each with their own maintainers, some backed by commercial providers and some not. For the purpose of running a cloud server, there are a few you should be aware of.
When deploying a web application to a Droplet, it might be tempting to simply use the same kind of setup as is used in development, i.e. starting the server by running “ruby app.rb” or “node server.js” in a terminal. This is simple and easy, while providing visible logs.This is dangerous: what happens if the server crashes and no one is around to restart it? This tutorial uses a simple Node.js application, but is applicable to most, if not all, others as well (be they Ruby, Python, etc.)
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