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This article is excerpted from my book, Linux in Action, and a second Manning project that’s yet to be released. The firewall A firewall is a set of rules. When a data packet moves into or out of a protected network space, its contents (in particular, information about its origin, target, and the protocol it plans to use) are tested against the firewall rules to see if it should be allowed through. Here’s a simple example: read more

Asterisk is the most popular and widely adopted open source framework for building communications applications. It is used by individuals, small businesses, large enterprises and governments worldwide.

Ubuntu 18.10 which is codenamed as Cosmic Cuttlefish is around the corner, is planned to be released next month on 18th October 2018. You will be able to download this release from the official website as well upgrade manually from previous releases. This time there is no alpha or beta milestones rather testing weeks for releases.

In the aftermath of Linus Torvalds apologizing for how he's been running the Linux kernel community, Linux has adopted a new code of conduct. But some now claim this means Linux is being taken over by social justice warriors.

News briefs for September 17, 2018.

Canonical has announced today the availability of an optimized Ubuntu Desktop images in the Microsoft Hyper-V gallery for Windows 10 Pro users who want to try out the latest Ubuntu Linux operating system.

Linux is known for its high standards of security & there are very low amount of viruses that has been known to infect a Linux system. But in the recent times as technology is...

The finger command in Linux is a popular tool to fetch information related to system users. Pinky is a lightweight alternative that comes pre-installed (at least on Ubuntu).

While the paperless world isn't here quite yet, more and more people are getting rid of paper by scanning documents and photos. Having a scanner isn't enough to do the deed, though. You need software to drive that scanner. But the catch is many scanner makers don't have Linux versions of the software they bundle with their devices. For the most part, that doesn't matter. Why? Because there are good scanning applications available for the Linux desktop. They work with a variety of scanners and do a good job. read more

Connecting a filename to the actual data is managed by the filesystem using a table or data structure, which is called a title allocation table. In the Linux filesystem, an Inode is the actual entry point to a specific file’s data on the hard disk. To simplify, you can just consider that the Inode represents the actual data of a file.

Conky is a free, open source, lightweight system monitoring tool available for Linux and BSD. It is used to monitor and display information of CPU consumption, disk usage, GPU temperature, fan speed, GPU clock, RAM utilization and network speed on the Linux or FreeBSD desktop

A package manager man-in-the-middle vulnerability put Alpine Linux Docker images at risk, but a patch is available now.

Grepping is awesome, as long as you don't glob it up! This article covers some grep and regex basics.

I think the first word I learned to type fast—and I mean really fast—was "fireball." Like most of us, I started my typing career with a "hunt-and-peck" technique, using my index fingers and keeping my eyes focused on the keyboard to find letters as I needed them. It's not a technique that allows you to read and write at the same time; you might call it half-duplex. It was okay for typing cd and dir, but it wasn't nearly fast enough to get ahead in the game. Especially if that game was a MUD. read more

In this article, we will explain how to take screenshots with a time delay both through the UI and the command line on Ubuntu 18.04.

Project chief vows to learn to 'understand people’s emotions' after F-bomb explosions Linux kernel firebrand Linus Torvalds has apologized for his explosive rants, and vowed to take a break from the open-source project and seek help.…

With so many cloud storage options readily available, some folks might question the value of having a home NAS (network-attached storage) server. After all, with your files on the cloud, you don't have to worry about managing the maintenance, updates, and security of your own server. read more

A Star Trek Audio Fan Audio Drama is not exactly the going topic for LXer, but the title "E.U.L.A." should tell you everything you need to know why this particular episode is on topic here. This episode does not depend on any prior episodes, so you can jump right in and experience an adventure full of fire, intrigue, and how licensing affects peoples lives.

I’m always on the look out for small indispensable utilities that make the Linux experience even better. This week, I’m seeking to garnish support for peek. It’s an unpretentious utility written in Vala. The utility has no delusion of grandeur. But it has qualities that carves out its own niche in the open source world.

Video: In a surprising move, Linus Torvalds, Linux's creator, is taking a break on his Linux kernel work to work on his behavior to other developers. In a note to the Linux Kernel Mailing List (LKML), Torvalds wrote, "I need to change some of my behavior, and I want to apologize to the people that my personal behavior hurt and possibly drove away from kernel development entirely."