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In my last article, I introduced Mypy, a package that enforces type checking in Python programs. Python itself is, and always will remain, a dynamically typed language. However, Python 3 supports "annotations", a feature that allows you to attach an object to variables, function parameters and function return values. These annotations are ignored by Python itself, but they can be used by external tools.

Are you using multiple monitors with your Linux workstation? Seeing many things at once might be beneficial. But there are often much more windows in our workflows than physical monitors — and that’s a good thing, because seeing too many things at once might be distracting.

Do you have a summer goal? Do longer days allow you to finally carve out time to work on a certain passion project? Will you be spending time AFK (away from keyboard) to enjoy no-code hobbies or volunteer? Are you traveling to any conferences or taking a family vacation? If you're still looking for inspiration, read what our writers had to say.

Password security involves a broad set of practices, and not all of them are appropriate or possible for everyone. Therefore, the best strategy is to develop a threat model by thinking through your most significant risks—who and what you are protecting against—then model your security approach on the activities that are most effective against those specific threats. The Electronic Frontier Foundation (EFF) has a great series on threat modeling that I encourage everyone to read.

The latest version of the Raspberry Pi—Raspberry Pi 4—was released today, earlier than anticipated, featuring a new 1.5GHz Arm chip and VideoCore GPU with some brand new additions: dual-HDMI 4K display output; USB3 ports; Gigabit Ethernet; and multiple RAM options up to 4GB. read more

In this edition of our open source news roundup, we take a look Cloudflare's open source random number generator, more open source robotics data, new npm functionality, and more!

Katherine Druckman and Doc Searls talk to Linux Journal Editor at Large, Petros Koutoupis, about moving from Mac to Linux.

I wrote recently that "GogglesMM has been one of my favorite players for quite some time now." So, when I was thinking about interviewing developers who build and maintain open source music players, Sander Jansen came quickly to mind. read more

Containers have shifted the way we think about virtualization. You may remember the days (or you may still be living them) when a virtual machine was the full stack, from virtualized BIOS, operating system, and kernel up to each virtualized network interface controller (NIC). You logged into the virtual box just as you would your own workstation. It was a very direct and simple analogy. read more

Public Key Infrastructure (PKI) provides a framework of encryption and data communications standards used to secure communications over public networks. At the heart of PKI is a trust built among clients, servers and certificate authorities (CAs). This trust is established and propagated through the generation, exchange and verification of certificates. This article focuses on understanding the certificates used to establish trust between clients and servers. These certificates are the most visible part of the PKI (especially when things break!), so understanding them will help to make sense of—and correct—many common errors.

News briefs for June 21, 2019.

Taicenn’s Linux-friendly, IP65 protected “TPC-DCM” industrial panel PCs let you choose between 6th or 7th Gen U-series Core, Apollo Lake, or Bay Trail CPUs with 2x GbE, SATA, optional wireless, and capacitive touchscreens between 15 and 24 inches. Taicenn, which last year introduced an Intel Bay Trail based, in-vehicle TPC-DCXXXC1E panel PC has now returned […]

Phorum is a PHP and MySQL based Open Source forum software. In this guide, we will guide you step-by-step through the Phorum installation process on the Fedora 30 operating system using Nginx as the web server, MariaDB as the database, and acme.sh and Let's Encrypt for HTTPS.

Sysadmins, site reliability engineers (SREs), and cloud operators all too often struggle to feel confident in their infrastructure as it scales up. Also too often, they think the only way to solve their challenges is to write a tool for in-house use. Fortunately, there are options. There are many open source tools available to test an infrastructure's performance. Here are my favorites.

This relatively unknown, but useful, sysadmin tool is getting a new chance for glory via The Linux Foundation.

What does it take to make a Linux distribution like Fedora 30? As you might expect, it’s not a simple process. Changes in Fedora 30 Although Fedora 29 released on October 30, 2018, work on Fedora 30 began long before that. The first change proposal was submitted in late August. By my count, contributors made […]

Only the Chinese now to sign off $34.5bn slurp. With the EU tipped to approve IBM's $34bn slurp of Red Hat next week, the open-source software house started Q1 of fiscal '20 with double-digit hikes in sales and profit, though its top line fell short of analyst estimates.…

This article demonstrates how to perform basic file and file I/O operations in Rust, and also introduces Rust's ownership concept and the Cargo tool. If you are seeing Rust code for the first time, this article should provide a pretty good idea of how Rust deals with files and file I/O, and if you've used Rust before, you still will appreciate the code examples in this article.

With the months ticking down to IBM's acquisition of Red Hat, the Linux and cloud power, business continues to perform at a high level.

Ibase has launched a 3.5-inch “IB822” SBC with an Intel Gemini Lake SoC with 16GB DDR4, 2x SATA, 2x GbE, triple displays, and 2x M2 expansion slots. Ibase’s IB822, which is not to be confused with its similarly 3.5-inch, circa-2008 IB882 SBC running the Atom Z500 or the more recent, Apollo Lake based IB818 3.5-inch […]