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Two common tasks that new programmers need to learn are how to read from and write to files stored on a computer. Some examples are when data and configuration files created in one application need to be read by another application, or when a third application needs to write info, warnings, and errors to a log file or to save its results for someone else to use. read more

When debugging code, you're often faced with figuring out when a variable changes. Without any advanced tools, you have the option of using print statements to announce the variables when you expect them to change. However, this is a very ineffective way because the variables could change in many places, and constantly printing them to a terminal is noisy, while printing them to a log file becomes unwieldy. read more

Main power of tcpdump packet sniffing tool comes from its flexible packet filtering rules and versatile protocol dissection capability. As you may know, only the sky is the limit when it comes to packet-level monitoring with tcpdump. This post provides a comprehensive tcpdump cheat sheet with detailed examples.

Diodes Delight has launched a $39 “Piunora” carrier for the Raspberry Pi CM4 with Arduino, ADC, and Qwiic expansion, and Mirko Electronics is prepping a “MirkoPC” carrier with dual HDMI and a DAC. Lately, it seems, most of the interesting embedded Linux news has been about carrier boards for the Raspberry Pi Compute Module 4. […]

If you use Git every day, you probably make a lot of commits. If you're using Git every day in a project with other people, it's safe to assume that everyone is making lots of commits. Every day. And this means you're aware of how disorienting a Git log can become, with a seemingly eternal scroll of changes and no sign of what's been changed. So how do you find out what file changed in a specific commit? It's easier than you think.

I recently started writing a game where you build words using letter tiles. To create the game, I needed to know the frequency of letters across regular words in the English language, so I could present a useful set of letter tiles. Letter frequency is discussed in various places, including on Wikipedia, but I wanted to calculate the letter frequency myself.

In the 21st century, we tend to take data storage for granted. We have lots of it, it's relatively affordable, and there are many different types of storage available. No matter how much cloud storage space you're given for free, there's nothing quite like having a physical hard drive for your really important (or really big, when you live on a slow network) data. However, few hard drives are sold right off the shelf, ready to use—in an ideal configuration, at least. read more

Search giant insists it's necessary, iTitan didn't have anything to say Android and iOS phones transmit telemetry back to Google and Apple, even when users have chosen not to send analytics data.…

In this edition of our open source news roundup, IBM's Call for Code aims to solve climate change, the Linux Foundation launches a new signing service, and more. read more

The hidden cost of multi-cloud, and how full open source reduces lock-in The X.Org Foundation has successfully completed a migration from Google Kubernetes Engine (GKE) to Packet, which it reckoned "should save us around $30 per day."…

Plus other improvements to the Linux service manager Version 248 of systemd, a widely used system and service manager for Linux, adds a feature called system extension images, designed to allow system files to be added, or appear to be added, even on read-only file systems.…

Learn how to use VCV Rack to make music with virtual modular synthesizers.

Click on the image above for TFiR coverage of the LF Energy Spring Summit To avert the worst of the climate crisis, the decarbonization of our power systems leads the way. We have ten years. With a greener grid, we can wholly embark on the electrification of automobiles, decarbonization of our built environments, and the […]

Varnish Cache is a powerful reverse HTTP proxy used to speed up web applications that is available as Open-Source software. In this post, we will show you how to install Varnish cache with Apache and Nginx on CentOS 8.

Rare diseases kill millions, but because they don't make the headlines that coronavirus does, they're often ignored. Now, the Linux Foundation and the OpenTreatment Foundation are joining forces to create open-source gene therapies for rare genetic diseases.

Big Blue and its claret-capped subsidiary accused of nicking UnixWare blueprints, lying, and conspiring. Xinuos, formed around SCO Group assets a decade ago under the name UnXis and at the time disavowing any interest in continuing SCO's long-running Linux litigation, on Wednesday sued IBM and Red Hat for alleged copyright and antitrust law violations.…

New CloudLinux-sponsored distribution hits GA ahead of Rocky Linux. The AlmaLinux project, sponsored by CloudLinux, has issued its first stable release along with details of a new open-source foundation set up to manage the project.…

It’s been less than a year since we launched Mozilla VPN, our fast and easy-to-use Virtual Private Network service brought to you by a trusted name in online consumer security …

CEO reckons this tech will be used in 300 billion chips. Arm has set out its stall for the first major new version of its instruction set architecture – Armv9 – in about a decade, and promised compatible chips will have improved machine-learning and security capabilities.…

Spiderfoot is a free and open-source vulnerability testing tool that helps you to reduce attacks by hackers. In this tutorial, we will show you how to install Spiderfoot on Ubuntu 20.04 server.