Tutorial Category: Tutorials

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grep tutorial
The grep command is a very powerful way to find documents on your computer. Learn how to use it in this tutorial.

Finding Interesting Documents with grep

The grep command is a very powerful way to find documents on your computer. You can use grep to see if a file contains a word or use one of many forms of regular expression to search for a pattern instead. Grep can check the file that you specify or can search an entire tree of your filesystem...
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zypper
The zypper tool for package and software repository management is fast and does the job. Learn more.

openSUSE Package Management Cheat Sheet

Debian/Ubuntu have long been my primary Linux distributions, although like all good Linux users I have used Fedora, CentOS, Gentoo, Red Hat, Slackware, Arch Linux, Mageia, and other Linux distributions because why not? It is a feast of riches and the best playground there is. I became a SUSE...
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NTP
In this first of a three-part series, Chris Binnie looks at why NTP services are essential to a happy infrastructure.

Arrive On Time With NTP -- Part 1: Usage Overview

Few services on the Internet can claim to be so critical in nature as time. Subtle issues which affect the timekeeping of your systems can sometimes take a day or two to be realized, and they are almost always unwelcome because of the knock-on effects they cause. Consider as an example that your...
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OpenSSL
In this tutorial, Carla Schroder explains how to protect your Postfix/Dovecot mail server with OpenSSL.

OpenSSL For Apache and Dovecot: Part 2

Last week, as part of our meandering OpenSSL series, we learned how to configure Apache to use OpenSSL and to force all sessions to use HTTPS. Today, we'll protect our Postfix/Dovecot mail server with OpenSSL. The examples build on the previous tutorials; see the Resources section at the end for...
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Python client for Kubernetes
Sebastien Goasguen takes the new Python client for Kubernetes for a spin.

Enjoy Kubernetes with Python

Over the past few years it seems that every cool and trending project is using Golang, but I am a Python guy and I feel a bit left out! Kubernetes is no stranger to this, it is written in Go, and most clients that you will find are based on the Go client. Building a Kubernetes client has become...
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OpenSSL
In this two-part series, Carla Schroder shows how to create your own OpenSSL certificates and how to configure Apache and Dovecot to use them.

OpenSSL For Apache and Dovecot

At long last, my wonderful readers, here is your promised OpenSSL how-to for Apache, and next week you get SSL for Dovecot. In this two-part series, we'll learn how to create our own OpenSSL certificates and how to configure Apache and Dovecot to use them. The examples here build on these tutorials...
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LXLE
Jack Wallen looks at LXLE, which stakes the claim that it can revive your old hardware without sacrificing productivity.

LXLE: A Linux Distribution Light on Resources But Heavy on Function

Most lightweight Linux distributions are fairly standard: They use a window manager with a small footprint and install a minimal amount of apps to continue with the small size metaphor. In the end, many of those distributions function well...at a cost of functionality. Typically, to get a...
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Linux holidays
Carla Schroder shares her list of fun Linux commands to create holiday delights.

5 Essential Linux Holiday Amusements

Yes, my fellow penguins, it is time for the annual ritual of having fun with silly Linux holiday commands! The fun of being a grownup is you get to make your own observances, and Linux silliness is one of mine. Without further ado let us plunge into our maelstrom of Linux holiday delights. No More...
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text editing
This tutorial shows how to use nano and vim to write, edit, and manage your Linux configuration files, scripts, and more.

An Introduction to Text Editors -- Get to Know nano and vim

At some point in your Linux administration career, you are going to edit a configuration file, write a Bash script, code, take a note, or any given task associated with text editors. When you do, you will turn to one of the popular text editors available to the Linux platform. vim nano These...
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rsyslog
In the final article in this series, we provide more details on using rsyslog and discuss some important networking considerations.

Remote Logging With Syslog, Part 4: Log Rotation

As you’ll recall, we’ve been taking a deep dive into the rsyslog tool for logging -- we presented an overview in the first article, took a look at the main config file in the second article, and examined some logfile rules and sample configurations in the third. In this final article in the series...
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