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We all have our preferences when it comes to the application we want to use for opening and working with a certain file type. In Ubuntu, you can change your default applications both through the command line and the graphical user interface through the simple steps described in this tutorial.

Prometheus is an open source monitoring and alerting toolkit for containers and microservices. The project is a hit with lots of different organizations regardless of their size or industrial sector. The toolkit is highly customizable and designed to deliver rich metrics without creating a drag on system performance. Based on the organizations that have adopted it, Prometheus has become the mainstream, open source monitoring tool of choice for those that lean heavily on containers and microservices. read more

Apache Subversion or SVN is open source versioning and revision control software. In this article, we show you how to set up Apache Subversion on the latest CentOS 7 server. We install and configure the svn software with Apache as web server, secure it with Let's encrypt and activate "Basic Authentication" for users.

Due to more and more network access needed in most of the distributed applications today, the restrictions which need to be applied for network access and monitoring has only increased. In this lesson, we will study the ten most popular Network Tools for Ubuntu OS which can be used to monitor network usage with visualization as well.

Security teams depend on high-quality logs for most preventative security efforts. Preventing an incident from occurring requires observable insight into where the failure might come from, and logs are one important source for such insights. When an incident occurs, organizations must be able to respond and contain them as quickly as possible. Logs are not only essential to find the source of a problem, but they also help identify appropriate countermeasures. read more

I was able to visit the DEF CON Voting Village, where actual voting machines were being hacked. But more importantly, there were independent experts and state government voting officials that you could talk to about the voting process. States such as Colorado are making strides by moving to paper ballots, requiring risk-limiting audits, and...

SchoolTool is a free and open source suite of free administrative software for schools that can be used to create a simple turnkey student information system, including demographics, grade book, attendance, calendaring and reporting for primary and secondary schools.

I have used rpm-based package managers to install software on Red Hat and Fedora Linux since I started using Linux more than 20 years ago. I have used the rpm program itself, yum, and DNF, which is a close descendant of yum, to install and update packages on my Linux hosts. The yum and DNF tools are wrappers around the rpm utility that provide additional functionality, such as the ability to find and install package dependencies. read more

Nagios (also known as Nagios Core) is a free and open source application which can be used for monitoring Linux or Windows servers, network infrastructures and applications. When properly configured it will alert you when something on your server goes wrong and then notify you again once the problem has been resolved. In this tutorial, we will show you how to install and configure the latest Nagios Core version on a CentOS 7 VPS.

Canonical released a new kernel live patch for all of its LTS (Long Term Support) Ubuntu Linux releases to address various security vulnerabilities discovered by various security researchers lately.

In the first article in this series comparing Perl 5 to Perl 6, we looked into some of the issues you might encounter when migrating code into Perl 6. In the second article, we examined how garbage collection works in Perl 6, and in the third article, we looked at how containers replaced references in Perl 6. read more

Airdroid doesn’t come with a desktop client for Linux. In this article we show you how you can connect your Android phone to your Linux desktop.

It’s true that any music player worth its salt plays podcasts. But there’s still a call for dedicated players. I’ve looked at podcasts built with web technologies as well as an interesting command-line podcast player. To add to the mix, let’s consider a further podcast player designed with the GNOME desktop in mind.

Do you enjoy running Fedora, containers, and have a Raspberry Pi? What about using all three together to play with LEDs? This article introduces Fedora IoT and shows you how to install a preview image on a Raspberry Pi. You’ll also learn how to interact with GPIO in order to light up an LED. What […]

Despite failing on some devices, like mobile, Microsoft’s Windows continues to be the number one choice on the desktop, with third-party data indicating a market share that’s close to 90 percent.

Nextcloud is an open source, self-hosted file share and collaboration platform, similar to Dropbox. In this tutorial we'll show you how to install and configure Nextcloud with Apache on an Ubuntu 18.04 machine.

There are three different kinds of storage solutions -- block, file, and object -- each serving a different purpose while working with the others. Block storage is the oldest form of data storage, where data is stored in...

It's a shame when a Linux version is delayed, but in the case of INSOMNIA: The Ark it should hopefully mean a better game.

Creating temporary files or directories is a common task that many Linux command line users do. But there's a dedicated command line tool - dubbed mktemp - that lets you do this.

At times, we require copying a single file to multiple locations on our system. So does that mean, we need to use the cp command multiple times? The answer is no! Let us read further to find a solution.