Category

For System Administrators

Improve your Bash scripts with Argbash

Do you write or maintain non-trivial bash scripts? If so, you probably want them to accept command-line arguments in a standard and robust way. Fedora recently got a nice addition which can help you produce better scripts. And don’t worry,… Continue Reading →

Fedora Classroom Session: Ansible 101

Fedora Classroom sessions continue this week with an Ansible session. The general schedule for sessions appears on the wiki. You can also find resources and recordings from previous sessions there. Here are details about this week’s session on Thursday, 30th November at 1600 UTC…. Continue Reading →

Firefox 57 coming soon: a Quantum leap

A few packages in Fedora get major updates outside the regular release cycle. The kernel is one of these, and Firefox is another. The maintainers do their best to handle these situations. Of course they always try to avoid any… Continue Reading →

Check disk usage at the command line with du

End users and system administrators sometimes struggle to get exact disk usage numbers by folder (directory) or file. The du command can help. It stands for disk usage, and is one of the most useful commands to report disk usage…. Continue Reading →

Troubleshooting SELinux

SELinux is one of the most powerful security features in your Fedora system. It’s like a valet key for your computer services, only allowing them to access approved data. SELinux has outgrown its early-days reputation for difficulty. Now it has… Continue Reading →

Keep DNF automatic updates rolling in Fedora 26

DNF Automatic is an optional Fedora component you can configure for automatic updates of packages. DNF Automatic is provided by the (aptly named) dnf-automatic package. This package has been available in previous releases of Fedora as well as in Fedora 26…. Continue Reading →

Never leave IRC again with ZNC

IRC (Internet Relay Chat) is an online chat protocol that has existed since 1988. IRC is a network of large chat rooms. Each room lets members of a community talk with each other from all corners of the world. Those new to IRC may… Continue Reading →

Edit images with GNU Parallel and ImageMagick

Imagine you need to make changes to thousands or millions of images. You might write a simple script or batch process to handle the conversion automatically with ImageMagick. Everything is going fine, until you realize this process will take more… Continue Reading →

How to upgrade from Fedora 25 Atomic Host to 26

In July the Atomic Working Group put out the first and second releases of Fedora 26 Atomic Host. This article shows you how to prepare an existing Fedora 25 Atomic Host system for Fedora 26 and do the upgrade. If… Continue Reading →

How to use the same SSH key pair in all AWS regions

This article shows how to use the AWS Command Line Interface (AWS CLI) to configure a single SSH key pair on multiple AWS Regions. By doing this you can access EC2 instances from different regions using the same SSH key… Continue Reading →

Enhancing smart backups with Duply

Welcome to Part 2 in a series on taking smart backups with duplicity. This article builds on the basics of duplicity with a tool called duply. Duply is a frontend for duplicity that integrates smoothly with recurring tools like cron… Continue Reading →

Taking smart backups with Duplicity

Backing up data is one of the most important tasks everyone should be doing regularly. This series will demonstrate using three software tools to backup your important data. When planning a backup strategy, consider the “Three Rs of backup”: Redundant:… Continue Reading →

Clustered computing on Fedora with Minikube

This is a short series to introduce Kubernetes, what it does, and how to experiment with it on Fedora. This is a beginner-oriented series to help introduce some higher level concepts and give examples of using it on Fedora. In… Continue Reading →

Introduction to Kubernetes with Fedora

This article is part of a short series that introduces Kubernetes. This beginner-oriented series covers some higher level concepts and gives examples of using Kubernetes on Fedora. The information technology world changes daily, and the demands of building scalable infrastructure become more important. Containers… Continue Reading →

Controlling Windows via Ansible

For many Linux systems engineers, Ansible has become a way of life. They use Ansible to orchestrate complex deployment processes, to define multiple systems with a quick and simple configuration management tool, or somewhere in between. However, Microsoft Windows users have generally required a… Continue Reading →

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