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Updated: 2 hours 20 min ago

6 Ways to Open Folders in Ubuntu 18.04 LTS

Saturday 16th of February 2019 01:22:24 PM
Opening folders in Ubuntu is one of the basic tasks you will perform as a regular Ubuntu user. In this article, we will explain 6 ways to open folders in the Ubuntu GUI and Shell.

Chakra GNU/Linux Users Get KDE Plasma 5.15 Desktop and KDE Applications 18.12.2

Saturday 16th of February 2019 11:52:33 AM
Users of the Chakra GNU/Linux distribution have received yet another batch of updates that bring them all the latest KDE technologies and security fixes.

Another little update on Ashes of the Singularity: Escalation for Linux

Saturday 16th of February 2019 10:17:53 AM
While Stardock haven't managed to get Ashes of the Singularity: Escalation onto Linux just yet, they did give another small update last month.

How to Install ERPNext on Ubuntu 18.04

Saturday 16th of February 2019 08:23:31 AM
ERPNext is an open-source Enterprise Resource Planning (ERP) framework designed around hassle-free web-based business process management. ERPNext features include Accounting, HR & Payroll, Manufacturing, Sales & Purchase, CRM, Projects, Help Desk, Asset Management, and a fully functional website. The ERPNext core is developed using the Python programming language. In this tutorial, we will show you how to install ERPNext on Ubuntu 18.04 on one of our optimized ERPNext hosting servers.

Make websites more readable with a shell script

Saturday 16th of February 2019 06:29:09 AM
If you want people to find your website useful, they need to be able to read it. The colors you choose for your text can affect the readability of your site. Unfortunately, a popular trend in web design is to use low-contrast colors when printing text, such as gray text on a white background. Maybe that looks really cool to the web designer, but it is really hard for many of us to read.

Ansible for the Windows admin

Saturday 16th of February 2019 04:34:47 AM
We are searching for a champion, a Windows administrator willing to venture out into the world of Ansible automation. No, you will not need to know Bash scripting or how to navigate your way around a Linux terminal. All you need is the desire all admins share: to complete mundane tasks as quickly as possible.

C Programming Tutorial 4 - Variables and Memory

Saturday 16th of February 2019 02:40:25 AM
In this tutorial series so far, we have discussed how to create and run a basic C program, what are preprocessors, as well as basics of variables. Now let's dig a bit deep into variables and discuss the memory aspect.

elementary 5 "Juno"

Saturday 16th of February 2019 01:38:53 AM
In the span of less than two years, a tiny little Linux distro came out ofnowhere to become one of the most watched and talked about systems available.In the blink of an eye, it went from nothing to passing severalgrand-daddies of Linux flavors that had been around for decades.

Audiophile Linux Promises Aural Nirvana

Friday 15th of February 2019 11:35:49 PM
This bring us to Audiophile Linux. Audiophile Linux is an Arch Linux-based distribution geared toward, as the name suggests, audiophiles. What makes Audiophile Linux special? First and foremost, it’s optimized for high quality audio reproduction.

Samsung Announces Galaxy Tab S5e Tablet with Android 9 Pie, Ultra Thin Design

Friday 15th of February 2019 10:34:17 PM
Samsung announced today the Galaxy Tab S5e tablet with a stylish and versatile design, and components to help you enjoy the best possible content from your favorite streaming services.

Why should you use Rust in WebAssembly?

Friday 15th of February 2019 09:32:45 PM
WebAssembly (Wasm) is a technology that has the chance to reshape how we build apps for the browser. Not only will it allow us to build whole new classes of web applications, but it will also allow us to make existing apps written in JavaScript even more performant. In this article about the state of the Rust and Wasm ecosystem, I'll try to explain why Rust is the language that can unlock the true potential of WebAssembly.read more

How to watch for releases of upstream projects

Friday 15th of February 2019 08:31:13 PM
Do you want to know when a new version of your favorite project is released? Do you want to make your job as packager easier? If so, this article is for you. It introduces you to the world of release-monitoring.org. You’ll see how it can help you catch up with upstream releases. What is release-monitoring.org? […]

Little Backup Box: A Handful of Improvements and a Dash of PHP

Friday 15th of February 2019 07:16:53 PM
My every Little Backup Box improvement project starts with the same thought, It does the job but... This time around I wanted to fix and improve several things.

4 Methods To Change The HostName In Linux

Friday 15th of February 2019 06:02:33 PM
2DayGeek: We can easily change the hostname on systemd system using the below four methods.

Linspire CE 8.0 Office 365 Released

Friday 15th of February 2019 04:48:12 PM
today the Linspire team is pleased to announce the release of Cloud Edition 8.0 Office 365. This is an update to our CE Office - by far one of our most popular business releases for 2018. We have worked diligently to thoroughly integrate Microsoft’s web services into this product. Who was this designed for? For our business and education users who rely on Microsoft’s web services in their offices and classrooms. CE Office 365 offers the standard Microsoft Office online platform married to the stability and security of the Linux desktop.

Modeling the Entire Universe

Friday 15th of February 2019 03:33:52 PM
For this article, I want to look at the largest thing possible, the wholeuniverse. At least, that's the claim made by Celestia, the softwarepackage I'm introducing here. In all seriousness though,Celestia is a very well done astronomical simulator, similar to othersoftware packages like Stellarium. Celestia is completely open source and islicensed under the GPL.

Latte – Excellent KDE Dock based on Plasma Frameworks

Friday 15th of February 2019 02:19:32 PM
Latte is a dock based on plasma frameworks that aims to offer an elegant and intuitive experience for your tasks and KDE Plasma widgets. It animates its contents by using parabolic zoom effect and tries to be as unobtrusive is possible.

Six years ago today, Steam was released for Linux - Happy Birthday

Friday 15th of February 2019 01:05:12 PM
Happy official birthday to the Steam client for Linux, today marks six years since it released for everyone.

Governments Are Spending Billions on Software They Can Get with Freedom

Friday 15th of February 2019 11:50:52 AM
It’s an issue, because it’s not going to end. Governments are claiming problems and issues in transferring to free software, and in doing that, they keep paying millions and millions of dollars each year, and continue to do so indefinitely; They have no plans to switch to free (as in freedom) locally-developed alternatives.

More in Tux Machines

Games: Surviving Mars and OpenMW

Kernel and Security: BPF, Mesa, Embedded World, Kernel Address Sanitizer and More

  • Concurrency management in BPF
    In the beginning, programs run on the in-kernel BPF virtual machine had no persistent internal state and no data that was shared with any other part of the system. The arrival of eBPF and, in particular, its maps functionality, has changed that situation, though, since a map can be shared between two or more BPF programs as well as with processes running in user space. That sharing naturally leads to concurrency problems, so the BPF developers have found themselves needing to add primitives to manage concurrency (the "exchange and add" or XADD instruction, for example). The next step is the addition of a spinlock mechanism to protect data structures, which has also led to some wider discussions on what the BPF memory model should look like. A BPF map can be thought of as a sort of array or hash-table data structure. The actual data stored in a map can be of an arbitrary type, including structures. If a complex structure is read from a map while it is being modified, the result may be internally inconsistent, with surprising (and probably unwelcome) results. In an attempt to prevent such problems, Alexei Starovoitov introduced BPF spinlocks in mid-January; after a number of quick review cycles, version 7 of the patch set was applied on February 1. If all goes well, this feature will be included in the 5.1 kernel.
  • Intel Ready To Add Their Experimental "Iris" Gallium3D Driver To Mesa
    For just over the past year Intel open-source driver developers have been developing a new Gallium3D-based OpenGL driver for Linux systems as the eventual replacement to their long-standing "i965 classic" Mesa driver. The Intel developers are now confident enough in the state of this new driver dubbed Iris that they are looking to merge the driver into mainline Mesa proper.  The Iris Gallium3D driver has now matured enough that Kenneth Graunke, the Intel OTC developer who originally started Iris in late 2017, is looking to merge the driver into the mainline code-base of Mesa. The driver isn't yet complete but it's already in good enough shape that he's looking for it to be merged albeit marked experimental.
  • Hallo Nürnberg!
    Collabora is headed to Nuremberg, Germany next week to take part in the 2019 edition of Embedded World, "the leading international fair for embedded systems". Following a successful first attendance in 2018, we are very much looking forward to our second visit! If you are planning on attending, please come say hello in Hall 4, booth 4-280! This year, we will be showcasing a state-of-the-art infrastructure for end-to-end, embedded software production. From the birth of a software platform, to reproducible continuous builds, to automated testing on hardware, get a firsthand look at our platform building expertise and see how we use continuous integration to increase productivity and quality control in embedded Linux.
  • KASAN Spots Another Kernel Vulnerability From Early Linux 2.6 Through 4.20
    The Kernel Address Sanitizer (KASAN) that detects dynamic memory errors within the Linux kernel code has just picked up another win with uncovering a use-after-free vulnerability that's been around since the early Linux 2.6 kernels. KASAN (along with the other sanitizers) have already proven quite valuable in spotting various coding mistakes hopefully before they are exploited in the real-world. The Kernel Address Sanitizer picked up another feather in its hat with being responsible for the CVE-2019-8912 discovery.
  • io_uring, SCM_RIGHTS, and reference-count cycles
    The io_uring mechanism that was described here in January has been through a number of revisions since then; those changes have generally been fixing implementation issues rather than changing the user-space API. In particular, this patch set seems to have received more than the usual amount of security-related review, which can only be a good thing. Security concerns became a bit of an obstacle for io_uring, though, when virtual filesystem (VFS) maintainer Al Viro threatened to veto the merging of the whole thing. It turns out that there were some reference-counting issues that required his unique experience to straighten out. The VFS layer is a complicated beast; it must manage the complexities of the filesystem namespace in a way that provides the highest possible performance while maintaining security and correctness. Achieving that requires making use of almost all of the locking and concurrency-management mechanisms that the kernel offers, plus a couple more implemented internally. It is fair to say that the number of kernel developers who thoroughly understand how it works is extremely small; indeed, sometimes it seems like Viro is the only one with the full picture. In keeping with time-honored kernel tradition, little of this complexity is documented, so when Viro gets a moment to write down how some of it works, it's worth paying attention. In a long "brain dump", Viro described how file reference counts are managed, how reference-count cycles can come about, and what the kernel does to break them. For those with the time to beat their brains against it for a while, Viro's explanation (along with a few corrections) is well worth reading. For the rest of us, a lighter version follows.

Blacklisting insecure filesystems in openSUSE

The Linux kernel supports a wide variety of filesystem types, many of which have not seen significant use — or maintenance — in many years. Developers in the openSUSE project have concluded that many of these filesystem types are, at this point, more useful to attackers than to openSUSE users and are proposing to blacklist many of them by default. Such changes can be controversial, but it's probably still fair to say that few people expected the massive discussion that resulted, covering everything from the number of OS/2 users to how openSUSE fits into the distribution marketplace. On January 30, Martin Wilck started the discussion with a proposal to add a blacklist preventing the automatic loading of a set of kernel modules implementing (mostly) old filesystems. These include filesystems like JFS, Minix, cramfs, AFFS, and F2FS. For most of these, the logic is that the filesystems are essentially unused and the modules implementing them have seen little maintenance in recent decades. But those modules can still be automatically loaded if a user inserts a removable drive containing one of those filesystem types. There are a number of fuzz-testing efforts underway in the kernel community, but it seems relatively unlikely that any of them are targeting, say, FreeVxFS filesystem images. So it is not unreasonable to suspect that there just might be exploitable bugs in those modules. Preventing modules for ancient, unmaintained filesystems from automatically loading may thus protect some users against flash-drive attacks. If there were to be a fight over a proposal like this, one would ordinarily expect it to be concerned with the specific list of unwelcome modules. But there was relatively little of that. One possible exception is F2FS, the presence of which raised some eyebrows since it is under active development, having received 44 changes in the 5.0 development cycle, for example. Interestingly, it turns out that openSUSE stopped shipping F2FS in September. While the filesystem is being actively developed, it seems that, with rare exceptions, nobody is actively backporting fixes, and the filesystem also lacks a mechanism to prevent an old F2FS implementation from being confused by a filesystem created by a newer version. Rather than deal with these issues, openSUSE decided to just drop the filesystem altogether. As it happens, the blacklist proposal looks likely to allow F2FS to return to the distribution since it can be blacklisted by default. Read more

gitgeist: a git-based social network proof of concept

Are you tired of not owning the data or the platform you use for social postings? I know I am. It's hard to say when I "first" used a social network. I've been on email for about 30 years and one of the early ad-hoc forms of social networks were chain emails. Over the years I was asked to join all sorts of "social" things such as IRC, ICQ, Skype, MSN Messenger, etc. and eventually things like Orkut, MySpace, Facebook, etc. I'll readily admit that I'm not the type of person that happily jumps onto every new social bandwagon that appears on the Internet. I often prefer preserving the quietness of my own thoughts. That, though, hasn't stopped me from finding some meaningfulness participating in Twitter, Facebook, LinkedIn and more recently Google+. Twitter was in fact the first social network that I truly embraced. And it would've remained my primary social network had they not killed their own community by culling the swell of independently-developed Twitter clients that existed. That and their increased control of their API effectively made me look for something else. Right around that time Google+ was being introduced and many in the open source community started participating in that, in some ways to find a fresh place where techies can aggregate away from the noise and sometimes over-the-top nature of Facebook. Eventually I took to that too and started using G+ as my primary social network. That is, until Google recently decided to pull the plug on G+. While Google+ might not have represented a success for Google, it had become a good place for sharing information among the technically-inclined. As such, I found it quite useful for learning and hearing about new things in my field. Soon-to-be-former users of G+ have gone in all sorts of directions. Some have adopted a "c'mon guys, get over it, Facebook is the spot" attitude, others have adopted things like Mastodon, others have fallen back to their existing IDs on Twitter, and yet others, like me, are still looking. Read more