Tutorials

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regex search
Regular expressions are a powerful tool for pattern matching and searching that every sys admin should know.

An Introduction to Regular Expressions for New Linux Users

Regular expressions are a powerful means for pattern matching and string parsing that can be applied in so many instances. With this incredible tool...
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Linux audio
Learn about MOC and SoX for playing audio files, and feh for viewing image files from the Linux command line in this tutorial.

3 Good Command-Line Audio and Graphics Apps for Linux

It is often faster to use command-line apps to play audio files and preview images than to futz around launching and using a graphical application,...
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How to Install Snap Applications on Ubuntu 14.04 LTS

Ubuntu 16.04LTS was released by Canonical back in April last year. Among some of the key new features it brought, one was a new packaging format...
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Semicode OS
If the thought of having every tool you need to develop pre-installed on a Linux distribution appeals to you, you should check out SemiCode OS.

SemiCode OS Might Be Your Next Development Platform

One thing about Linux is that it’s very coder-friendly. Why? Simple: Nearly any developer can have every tool they need at their fingertips with ease...
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CentOS
Get reliable up-to-date packages for CentOS from the Software Collections repository, EPEL, and Remi.

Best Third-Party Repositories for CentOS

Red Hat Enterprise Linux, in the grand tradition of enterprise software vendors, packages and supports old mold long after it should be dead and...
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Blocking of International Spam Botnets with a Postfix Plugin

This article contains an analysis and solution for blocking of international SPAM botnets with on postfix mail servers by using a postfwd plugin...
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rtop – An Interactive Tool to Monitor Remote Linux Server Over SSH

rtop is a straightforward and interactive, remote system monitoring tool based on SSH that collects and shows important system performance values...
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How To Write and Use Custom Shell Functions and Libraries

In Linux, shell scripts help us in so many different ways including performing or even automating certain system administration tasks, creating...
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Cloud Platform Overview

Gain a solid understanding of the current state of Cloud platforms, how to integrate the Cloud into your systems and how to manage the risks. In this...
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Shorewall
Shorewall is an open source firewalling tool that makes the task of network security easier.

An Introduction to the Shorewall Firewall Tool

Linux is well known for being a highly secure platform. One of the reasons for said security is the Netfilter system. For those that don’t know,...
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