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Kernel: New Stable Releases and Hardware Support, Atomics Support in eBPF

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Linux
  • Linux 5.10.9
  • Linux 5.4.91
  • Linux 4.19.169
  • Linux is Finally on Apple M1...Kind Of.

    Half of the reason to buy a Mac is to get native support for macOS, but that doesn’t mean Mac owners don’t also suffer from the grass-is-greener syndrome. While Apple’s operating system is known for being casual friendly and is also the OS system people who grew up on its products might be more familiar with, PC users are always quick to point out that the extra steps it adds to actions like installing programs can slow down more serious work. It’s currently possible to emulate Windows for ARM on Apple’s latest M1 Macs, but what if you want to take your power user cred a step further and use Linux on your new M1 Mac?

  • Pioneer DJM-750 DJ Mixer Handling For Linux Is En Route - Phoronix

    With Linux 5.11 came Pioneer DDJ-RR DJ controller support while for Linux 5.12 additional Pioneer DJ equipment will be supported.

    The latest Pioneer DJ kit to be supported by the Linux kernel is the Pioneer DJM-750 digital audio mixer. The Pioneer DJM-750 is a 4-channel mixer with built-in 24-bit / 96 kHz USB sound card and the same 32-bit DSP found in Pioneer's higher end models like the DJM-900NXS.

  • 2021 Could Be The Year That AMD Radeon Graphics Can Hot Unplug Gracefully On Linux - Phoronix

    It's been nearly one year that AMDGPU patches have been around to better handle GPU hot unplugging on Linux. The use-case for that being either removal via sysfs such as if then assigning the GPU to a VM or for external GPUs such as connected via Thunderbolt. Those patches are still baking but the latest iteration of the work has now been published by AMD.

    Currently the hot removal of AMD Radeon GPUs under Linux can result in a kernel oops or system hangs or application hangs, among related headaches. Reportedly, Windows doesn't handle the GPU hot-unplug situation much better.

  • Linux 5.12 To Add Atomics Support To The Promising eBPF - Phoronix

    The eBPF in-kernel virtual machine that allows for handling sandboxed "programs" within the Linux kernel continues on its stellar upward trajectory.

    eBPF remains one of the most exciting and revolutionary changes in recent years within the Linux kernel and new features continue to be tacked on to allow eBPF to fulfill more roles than the original BPF network packet filter use-case. Should you not be too familiar with eBPF, learn more on the technology at eBPF.io.

Ubuntu Now Runs on Apple Silicon...

  • Ubuntu Now Runs on Apple Silicon, Devs Say It’s ‘Completely Usable’

    Developers at ARM virtualisation company Corellium have managed to get Ubuntu 20.04 up and running on the new Apple Silicon Mac Mini.

    And we’re not talking ‘it boots and prints a load of text’ running here. No, this is the full Ubuntu desktop experience — and it’s already being described as “completely usable”!

Linux is now 'fully usable' on Apple Silicon M1 Macs

  • Linux is now 'fully usable' on Apple Silicon M1 Macs

    Security researchers at Corellium have ported a version of Linux to the Apple Silicon M1 chip that will ultimately be released under an open-source license.

    The Linux version is a full Ubuntu desktop operating system booted from a USB, according to Corellium Chief Technology Officer Chris Wade. Although details are scarce, he said that Linux is now "completely usable" on Apple Silicon machines.

Initial Patches Posted For Bringing Up The Linux Kernel On Apple

  • Initial Patches Posted For Bringing Up The Linux Kernel On Apple Silicon M1 Hardware

    Following a very active past couple of days, developers from security startup Corellium have followed through on their word so far of publishing the Apple Silicon patches to the Linux kernel mailing list for possible upstreaming in the future that allow the Linux kernel to boot with Apple M1 hardware.

    Corellium developers sent out their first set of seven patches under a "request for comments" flag this morning. These are the minimal changes needed for getting Linux to boot on the current Apple M1 ARM-based hardware.

Linux on the Apple M1 takes another step closer with Ubuntu work

  • Linux on the Apple M1 takes another step closer with Ubuntu working thanks to Corellium

    ARM virtualization company Corellium has managed to get Ubuntu Linux running on the next-generation Apple M1.

    The news comes from Corellium CEO, Chris Wade, who mentioned on Twitter how "Linux is now completely usable on the Mac mini M1. Booting from USB a full Ubuntu desktop (rpi). Network works via a USB c dongle. Update includes support for USB, I2C, DART. We will push changes to our GitHub and a tutorial later today.".

    Impressive speedy work, and a separate project to the recently revealed Asahi Linux which is also aiming to do the same thing. Two heads are better than one, as they say. The Corellium team mentioned on Twitter they full back the Asahi project too, so it's wonderful to see true cooperation.

    Right now this effort doesn't appear to have full GPU acceleration so it's doing software rendering, making it less suitable for a daily driver but work is ongoing towards that. Eventually everything will be in place, and it's taking far less time than I personally expected to see it running on such brand new hardware from Apple.

Linux is Finally on Apple M1...Kind Of.

  • Linux now 'completely usable' on M1 Mac mini

    The initial announcement came with a warning that the "very early" beta was for "advanced users only", and that USB support and a more complete release was on the way.

    As Wade has now noted, users can now boot from USB to a full Ubuntu desktop.

Security researchers have ported Ubuntu Linux for Apple Silicon

More on Linux for M1

  • Apple M1 Macs can now run Ubuntu Linux thanks to Corellium

    The sheer impressive power of the Apple Silicon M1 processor has made developers, hackers, and tinkerers daydream about possible use cases beyond what Apple intended or would even allow. Some have already gotten Windows to run on it, in a virtualized environment fashion, of course. Now a few security researchers have also figured out how to run Linux directly on the hardware, albeit with a few catches that could still make it not that useful for a daily driver for Linux users.

  • ‘Completely Usable’ M1 Mac Version of Ubuntu Linux Now Available

    ARM software virtualization company Corellium has released a “completely usable” version of Ubuntu Linux that runs on M1 Macs. Corellium CTO Chris Wade announced the release early this morning.

    Security researchers at the company have developed a port that has been released on GitHub with an installation tutorial is said to be coming later today.

  • Ubuntu has been ported to Mac M1 devices

    Many Mac users utilize a dual-boot setup with their devices. However, that hasn’t been possible for the Mac M1, at least until now. A (very) barebones version of Ubuntu can now dual-boot on M1-powered Macs, though most will want to hold off on installing it for now.

  • M1 Macs can now run full version of Linux thanks to new Corellium port

    Since the new M1 Macs were announced, developers have been working to run different operating systems on the Apple Silicon platform, including Windows and Linux. Now, thanks to Corellium, it’s possible to run Ubuntu — a popular Linux distro — on new Macs with M1 chip.

    The announcement was made on Twitter by Corellium’s CTO Chris Wade. Corellium offers solutions for virtualization of ARM devices and platforms, and it was recently involved in a lawsuit with Apple regarding a tool that lets users virtualize iOS.

You can now run Linux on Apple M1 devices

  • You can now run Linux on Apple M1 devices

    Developers from security startup Corellium have revealed they managed to get Linux running on Apple's Arm-based M1 devices natively.

    While Linux, and even Windows, were already usable on Apple Silicon thanks to virtualization, this is the first instance of a non-macOS operating system running natively on the hardware.

    “Linux is now completely usable on the Mac mini M1. Booting from USB a full Ubuntu desktop (rpi),” wrote Corellium’s CTO Chris Wade on Twitter while sharing pictures of Ubuntu's Raspberry Pi ARMv8 desktop image booting on Apple M1 hardware.

Linux has been ported to run on Apple’s M1 Macs

  • Linux has been ported to run on Apple’s M1 Macs

    A new Linux port allows Apple’s M1 Macs to run Ubuntu for the first time. Corellium, a security firm that offers a virtualized version of iOS for security testing, has successfully ported Ubuntu over to M1 Macs and released a tutorial for others to follow. The modified version of Ubuntu boots into the regular user interface and includes USB support.

    The team at Corellium have detailed exactly how they managed to get Ubuntu running, and it’s a good in-depth read if you’re interested in the details. While a number of M1 components are shared with Apple’s mobile chips, the non-standard chips made it challenging to create Linux drivers to get Ubuntu running properly.

Corellium ports Linux to Apple M1 Mac mini

  • Corellium ports Linux to Apple M1 Mac mini

    I was sure that Linux would eventually run on Apple's ARM-based M1 CPU. After all, Linux has been ported to essentially every processor on the planet. Even without Apple's co-operation, it would only be a matter of time. I'd assumed it would take a year or so. I was wrong. Correllium, a company specializing in ARM virtualization and developer tools, has successfully ported Linux to Apple's new M1-powered Mac mini.

    [...]

    For now, only people who really know Linux should be trying this out. Wade said that binary files and a how-to document are being worked on. For the moment, you must still compile the linux-M1 code yourself.

    That done, you can boot your M1 Mac mini from a USB stick into a full Ubuntu Linux desktop. For networking, you'll also need a USB-C dongle. More work is being done, even as I write this, to include better USB and I2C serial communications protocol.

    Behind the scenes, the M1 Linux port is based on work done in Corelliums' Project Sandcastle. This was a project to get Android and Linux running on iPhones.

    In short, although the M1 is a new chip, with its work on iPhone chipsets Corellium was already digging the foundations for Linux on M1. That's because "many of the devices on the SoC [System on a Chip] didn't change from the programmers' perspective."

How We Ported Linux to the M1

  • How We Ported Linux to the M1

    When Apple released their desktop products with the M1 processor in November 2020, quite a few people in the tech community were surprised by the excellent performance of these systems. But those who have been following the development of Apple phone chipsets closely knew that the evolutionary path Apple followed would result in a powerful 64-bit ARM processor.

    At Corellium, we've been tracking the Apple mobile ecosystem since iPhone 6, released in 2014 with two 64-bit cores. Since then, Apple has been focusing their energy on building faster chips, preferring to improve single-threaded performance over throwing more cores on the chip. This approach was enabled by their in-house hardware design team, and resulted in unique parts with a broad feature set, leading the industry in terms of architectural features.

    It also made Apple silicon rather distinct from all other 64-bit ARM hardware in terms of both CPU core and peripherals. Our Corellium virtualization platform has been providing security researchers with unparalleled insight into how operating systems and programs work on Apple ARM processors. But in the process of developing our virtualization system, we also gain knowledge about the hardware we are modeling, and this knowledge can be best refined by testing it against real hardware - which we have only been able to do with the emergence of checkm8, an exploit that let us load programs onto Apple smartphones. This led directly to the Sandcastle project, where we built a kernel port to the A10 processor in early 2020.

Finally! Linux Runs Gracefully On Apple M1 Chip

  • Finally! Linux Runs Gracefully On Apple M1 Chip

    Apple’s M1 chip is continuously in the buzz because of its impressive capability of monstrous performance on their own ARM-based MacBook and Mac Mini.

    And, for that reason, many Linux users want to get their hands on them. But without proper Linux support, it would be a nightmare.

    While Linus Torvalds didn’t have high hopes for this to happen, it looks like Corellium – a company who specializes with ARM device virtualization has finally made it possible.

    In a tweet by Chris Wade (CTO of Corellium), he mentions that Linux is completely usable on a Mac Mini M1. Before you blindly grab a device with Apple Silicon, let me tell you more about it.

Ubuntu Linux is now running on M1 Macs

We turn away for a second and Corellium is already showing off

  • We turn away for a second and Corellium is already showing off Ubuntu on Apple Silicon

    Those with pockets deep enough to spring for Apple's latest and greatest and a desire to avoid macOS can follow a relatively straightforward guide from Corellium on getting the Raspberry Pi image of Ubuntu 20.10 up and running. "We used a Raspberry Pi image because it was a live USB boot image, so we only had to make minor modifications to boot it," the team explained.

    Corellium also paid tribute to the team behind PongoOS – a pre-boot execution environment for Apple boards – "for contributing their expertise and collaboration".

    An RFC has been submitted to upstream with a view to review and potentially include the changes for a minimal Linux on Apple Silicon boot. The latest patches were pushed to the GitHub repo late yesterday.

    There are alternatives in the works too. The Asahi Linux project notwithstanding, virtualization is also an option.

‘Completely Usable’ Version of Linux

  • ‘Completely Usable’ Version of Linux for M1 Macs Released

    Corellium CTO Chris Wade has announced today that Ubuntu Linux is now completely installable and usable on the new M1 Macs. Researchers at the company have developed and released a port through which you can install Linux for M1 Macs. Apple announced the first batch of its custom silicon Macs last year which includes the MacBook Air, MacBook Pro, and Mac Mini. If you're a die-hard Linux user, you can now give it a swing on your new M1 Mac.

'Completely Usable' Version of Linux for M1 Macs

  • Corellium Releases 'Completely Usable' Version of Linux for M1 Macs

    Ubuntu Linux is installable and functional on M1 Macs thanks to work done by Corellium, Corellium CTO Chris Wade announced early this morning. Security researchers at the company have developed a port that has been released on GitHub with an installation tutorial coming later today.

Corellium Successfully Runs Ubuntu Linux on M1 Mac

  • Corellium Successfully Runs Ubuntu Linux on M1 Mac

    Corellium has announced it has Ubuntu Linux running on an M1 Mac, in what is described as a “completely usable” experience.

    Mac computers are popular options for Linux users and developers. Many want to combine their operating system (OS) of choice with machines that are widely considered to be among the best industrial designs in the business.

    With Apple moving to its own custom silicon, however, there was doubt about the future of Linux on Macs. Apple’s new M1 chip is an ARM-based designed, similar to what the company has been running in iPhones and iPads for years.

    Even Linus Torvalds has said he would love to run one of the new M1 Macs, but wasn’t optimistic it could run Linux.

M1 Mac now supports an Ubuntu port

  • M1 Mac now supports an Ubuntu port

    The chips are based on ARM architecture, same as the iPhone, iPad, and Apple TV processors. The change means that the new M1 Macs will not support the use of Bootcamp which is used to install Windows alongside macOS or even flavours of Linux. However, to rescue, a security firm named Corellium has successfully ported Ubuntu to M1 Macs.

Ubuntu Linux finally bootable on Apple M1 Mac

  • Ubuntu Linux finally bootable on Apple M1 Mac

    It has been a while since Apple’s new M1 Mac PC was launched. But now reports have surfaced that everyone’s favourite Ubuntu Linux is completely installable and usable on the new M1 Macs. According to sources, various developers working on the project have released a port through which you can install Linux for M1 Macs.

    Corellium’s Chris Wade announced the Linux port for M1 Macs on Twitter earlier today. But since it’s just an initial port there are indeed a lot of limitations. Let not forget that the M1 Mac comes with apples new silicon and is generally new in the market.

  • Someone Got Linux Up And Running On An M1 Mac Mini

    Not a fan of Apple’s macOS operating system but like the new M1 hardware that accompanies it? Then maybe installing a different operating system could be the answer, and no, we’re not talking about Windows. Thanks to the team at Corellium, it appears that they have managed to get Linux up and running on the M1 powered Mac mini.

    According to Corellium’s Chief Technology Office Chris Wade, this is a full version of the Ubuntu desktop operating system that has been booted from a USB drive. While Wade does not dive into the details, he does claim that the version of Linux they installed is “completely usable” on Apple Silicon computers.

  • You can run Linux on an M1 Mac if you have the patience | Engadget

    Corellium has successfully run Ubuntu Linux on Apple's M1 Macs, although you'll need a USB drive and some know-how to make it work.

  • Someone ported Linux to the new Arm-based Mac Mini

    Running Linux on Intel-based Macs is relatively easy. Now that Apple is transitioning to its own silicon, it is no longer so straightforward. Although the M1 SoCs are Arm-based processors, and there are Arm versions of Linux available, components on the new Apple chips don't play well with current Linux distos.

    Apple has not made dual-booting easy on its newest Arm-based computers. While there are Linux distros designed to run on Arm hardware, Apple silicon is a different breed. However, Security researchers at Corellium have a working Linux port for Apple's M1 Macs.

    The operating system Corellium developed is an Arm-based Ubuntu distro that boots from a USB drive, but it is not as simple as plug-and-play. The main hurdle to getting Linux running on the M1 is hardware drivers.

In AppleInsider

  • How Linux was ported to the Apple Silicon M1 Mac mini

    Linux now works on the Mac mini with M1 processor — but Apple did not make it easy for the team to port the OS with its custom firmware and unique data paths. Here's how Corellium got it done.

    Now that Linux is fully usable on Macs with M1 processors the team at Corellium has detailed their process for porting the OS.

    In Thursday's post, Corellium says that they have been studying Apple's custom processors since the iPhone 6 released in 2014. The company used some exploits and the previous study to build a kernel port to the A10 processor in early 2020.

    Apple released the Macs with M1 processor in November 2020. A follow-on OS update enabled users to install custom kernels. Following the addition of that ability, the Corellium team began working on a Linux port.

3 More

  • Corellium Details How to Install Linux on Your M1 Mac
  • Corellium releases “fully usable” Linux build for Apple Silicon-based Macs - O'Grady's PowerPage

    This portends some good things to come for operating systems that can run on new Apple Silicon hardware.

    A group of security researchers at Corellium have ported a version of Linux to the Apple Silicon M1 chip that will ultimately be released under an open-source license.

    The Linux version is a full Ubuntu desktop operating system that can be booted from a USB device, per Corellium’s Chief Technology Officer Chris Wade. While details as presently scarce, Wade has stated that Linux is now “completely usable” on Apple Silicon hardware.

  • You can now run Linux on your M1-equipped Mac, kind of

    Apple’s new M1 powered Macs have blisteringly fast speed, but only if you want to use macOS. Windows support might be a ways off, but if you want to tinker with Linux there’s now a port for Ubuntu to run on the new ARM-powered Macs.

    Security firm Corellium knows a thing or two about virtualization on Apple devices, as they offer a virtualized version of iOS for security testing purposes. Now they’ve managed to port Ubuntu, one of the most popular Linux distributions, to run on the new M1 Macs. Even better, they’ve laid out exactly what you need to do if you want to have a go yourself.

Linux can now be run on the Mac Mini with Apple Silicon

  • Linux can now be run on the Mac Mini with Apple Silicon

    Ever since Apple launched its new Macs with the company’s new high-performance ARM chips, third-party software developers have been hard at work getting alternative operating systems up and running on the new hardware. Early last month, a few developers booted Windows 10 and Fedora Linux on an M1 Mac via virtualization, but the biggest breakthrough in alternative OS development for M1 Macs has come from the team at Corellium, a firm that specializes in ARM device virtualization. The team has managed to port Linux and make it “completely usable” on the M1 Mac Mini.

M1 Mac gets Ubuntu Linux port release

  • M1 Mac gets Ubuntu Linux port release

    Chris Wade, CTO of Corellium has announced via tweet that M1 Macs will be getting a functional Ubuntu Linux port. The software will be released on GitHub and will include a tutorial for those who are interested.

Ubuntu Linux Now Runs On Apple M1 Silicon Macs

  • Ubuntu Linux Now Runs On Apple M1 Silicon Macs, What To Expect And How To Prepare

    One of the more pragmatic aspects of Intel-powered Macs was their ability to run alternative operating systems, including Windows and Linux, without much effort at all. Apple even included a Windows preparation tool, Boot Camp, on all of its systems with Intel Core processors. With the advent of Apple Silicon Macs (such as the recent Mac mini) that have the company's M1 SoC under the hood, Apple discontinued Boot Camp. Those systems had been locked into macOS 11 Big Sur, but thanks to Arm-based virtual cloud device maker Corellium, Ubuntu Linux is now "completely usable."

    Arm offers an array of licenses to its architecture that range from processor licenses, in which a chip vendor can whole hog plug modules of Arm CPU cores into a chip, to the more abstracted architecture license, which is what Apple uses to develop custom Arm64 CPUs for its own devices. Being an architecture licensee, Apple is beholden to nobody in the way that its chips implement the ISA and boot an operating system. According to Corellium, those implementation differences are what made it a bit more difficult to get running Ubuntu. In a series of tweets, Corellium's Chief Technical Officer Chris Wade recently showed off Ubuntu running on an Apple M1-powered Mac mini, so we felt compelled to explore it a little ourselves as well.

Corellium has ported Linux to Apple’s M1-based Macs

  • Corellium has ported Linux to Apple’s M1-based Macs

    When Apple first announced the M1 chip, many people were interested in seeing macOS running on ARM instead of Intel-based hardware. Due to the change, Macs were seemingly bound to macOS and Apple’s walled garden rules, but one Linux development group has found a way around this, enabling Ubuntu OS to run on M1 powered Macs.

    Corellium is a start-up company specialising in virtualisation and emulation of ARM-based platforms. Using its expertise in these areas, the company has created a “completely usable” version of Linux for Apple’s M1-powered devices. In the tweet posted by Chris Wade, the CTO of Corellium showed photos of a Mac Mini M1 running a version of Ubuntu.

Run Linux on Apples M1 processor using new Corellium port

  • Run Linux on Apples M1 processor using new Corellium port

    Since the availability and launch of Apples new M one silicon chip, calipers have been working hard to run different operating systems on the platform with the most obvious being Windows and Linux. Today thanks to Corellium, owners of new MacBooks by the latest silicon M1 chips can now run the Ubuntu Linux operating system. Corellium’s CTO Chris Wade made the announcement via Twitter explaining that the Corellium development team has been able to bring Linux to the Apple M1 Macs using a modified version of Ubuntu that supports the full user interface, in addition to USB, I2C, and DART. Although don’t expect everything to be supported as the project is still in its beta release at the moment. The 9to5Mac website explains more.

    “For instance, you’ll probably need a USB-C dongle to use the network when booted into Linux, not to mention that there’s no hardware acceleration for now. Even so, it’s very interesting to see that they managed to run a full version of Linux on the new Macs with ARM-based chips — and the project is still in beta.”

Yahoo! News

Lilbits: Linux on Apple Silicon...

  • Lilbits: Linux on Apple Silicon and the uncertain future of the LG Rollable smartphone

    Apple launched the first Macs with Apple Silicon a few months ago, delivering a big boost in performance while also reducing power consumption. One downside of Apple’s switch from Intel processors to its own ARM-based custom chips though, is that you can no longer easily install Windows alongside macOS using Boot Camp, and for a while there was no easy way to install GNU/Linux distributions either.

    But this week developers at ARM virtualization company Corellium announced that they’d ported Linux to run on a Mac Mini with an Apple M1 chip. Corellium CTO Chris Wade says the team’s proof of concept build of Ubuntu (based on a version made to run on Raspberry Pi computers) is “completely usable,” and boots a “full Ubuntu desktop” from a USB flash drive.

Another belated one

  • You can presently operate Linux on Apple M1 machines

    The Creators from security startup, Corellium have disclosed that they governed to bring Linux operating on Apple’s Arm founded M1 appliances natively.

    As Linux, and Windows, were already available on Apple Silicon owing to virtualization, this is the very initial example of those non macOS operating systems (O.S) operating on the hardware.

    The CTO of Corellium, Chris Wade stated earlier on Twitter that Linux is presently entirely available on the Mac mini M1. Booting it from USB an entire Ubuntu desktop computer (rpi), whereas trading the images of Ubuntu’s Raspberry Pi ARMv8 desktop computer picture booting on Apple M1 machine.

Ubuntu Linux is currently operating on M1 Macs

  • Ubuntu Linux is currently operating on M1 Macs

    For the first time, clients of Apple Silicon Macs utilizing Apple’s M1 chip, for example, the entry-level 13-inch MacBook Pro, Mac mini, and MacBook Air—would now be able to boot in to and natively run Linux.

    The vintage at play here is Ubuntu, and the port was created by Corellium, which in any case virtualizes iOS and other ARM-based OSes to empower simpler security testing. It’s important also that Apple has recently sued the organization over said iOS security testing tool. The lawsuit didn’t turn out well for Apple.

    Corellium Chief Technology Office Chris Wade declared the culmination of the cooperation on Twitter yesterday. What’s more, in a blog post on Corellium’s site, the group behind the port writes that it was created in corresponding with the group’s efforts at “creating a model of the [M1] for our security research part.”

Maybe plagiarist site

  • Apple M1 Macs can now run the full version of Linux

    A new Linux port allows Apple’s Mac M1s to run Ubuntu for the first time. Corellium, a security company that provides a virtualized version of iOS for security testing, has successfully ported Ubuntu to the M1 Macs and posted a tutorial for others to follow. The modified version of Ubuntu boots into the normal user interface and includes USB support.

    The Corellium team have detailed how they got Ubuntu to work, and it’s a good in-depth article if you’re interested in the details. Although some M1 components are shared with Apple’s mobile chips, non-standard chips have made it difficult to create Linux drivers to make Ubuntu work properly.

    Apple didn’t design its M1 Macs with dual boot or Boot Camp in mind. Craig Federighi, senior vice president of software engineering at Apple, previously ruled out official support for startup alternative operating systems such as Windows or Linux. Virtualization seems to be Apple’s preferred method, but that hasn’t stopped people from creating their own ports.

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A warning about 5.12-rc1

  • A warning about 5.12-rc1
    Hey peeps - some of you may have already noticed that in my public git
    tree, the "v5.12-rc1" tag has magically been renamed to
    "v5.12-rc1-dontuse". It's still the same object, it still says
    "v5.12-rc1" internally, and it is still is signed by me, but the
    user-visible name of the tag has changed.
    
    
    
    
    The reason is fairly straightforward: this merge window, we had a very
    innocuous code cleanup and simplification that raised no red flags at
    all, but had a subtle and very nasty bug in it: swap files stopped
    working right.  And they stopped working in a particularly bad way:
    the offset of the start of the swap file was lost.
    
    
    
    
    Swapping still happened, but it happened to the wrong part of the
    filesystem, with the obvious catastrophic end results.
    
    
    
    
    Now, the good news is even if you do use swap (and hey, that's nowhere
    near as common as it used to be), most people don't use a swap *file*,
    but a separate swap *partition*. And the bug in question really only
    happens for when you have a regular filesystem, and put a file on it
    as a swap.
    
    
    
    
    And, as far as I know, all the normal distributions set things up with
    swap partitions, not files, because honestly, swapfiles tend to be
    slower and have various other complexity issues.
    
    
    
    
    The bad news is that the reason we support swapfiles in the first
    place is that they do end up having some flexibility advantages, and
    so some people do use them for that reason. If so, do not use rc1.
    Thus the renaming of the tag.
    
    
    
    
    Yes, this is very unfortunate, but it really wasn't a very obvious
    bug, and it didn't even show up in normal testing, exactly because
    swapfiles just aren't normal. So I'm not blaming the developers in
    question, and it also wasn't due to the odd timing of the merge
    window, it was just simply an unusually nasty bug that did get caught
    and is fixed in the current tree.
    
    
    
    
    But I want everybody to be aware of because _if_ it bites you, it
    bites you hard, and you can end up with a filesystem that is
    essentially overwritten by random swap data. This is what we in the
    industry call "double ungood".
    
    
    
    
    Now, there's a couple of additional reasons for me writing this note
    other than just "don't run 5.12-rc1 if you use a swapfile". Because
    it's more than just "ok, we all know the merge window is when all the
    new scary code gets merged, and rc1 can be a bit scary and not work
    for everybody". Yes, rc1 tends to be buggier than later rc's, we are
    all used to that, but honestly, most of the time the bugs are much
    smaller annoyances than this time.
    
    
    
    
    And in fact, most of our rc1 releases have been so solid over the
    years that people may have forgotten that "yeah, this is all the new
    code that can have nasty bugs in it".
    
    
    
    
    One additional reason for this note is that I want to not just warn
    people to not run this if you have a swapfile - even if you are
    personally not impacted (like I am, and probably most people are -
    swap partitions all around) - I want to make sure that nobody starts
    new topic branches using that 5.12-rc1 tag. I know a few developers
    tend to go "Ok, rc1 is out, I got all my development work into this
    merge window, I will now fast-forward to rc1 and use that as a base
    for the next release". Don't do it this time. It may work perfectly
    well for you because you have the common partition setup, but it can
    end up being a horrible base for anybody else that might end up
    bisecting into that area.
    
    
    
    
    And the *final* reason I want to just note this is a purely git
    process one: if you already pulled my git tree, you will have that
    "v5.12-rc1" tag, and the fact that it no longer exists in my public
    tree under that name changes nothing at all for you. Git is
    distributed, and me removing that tag and replacing it with another
    name doesn't magically remove it from other copies unless you have
    special mirroring code.
    
    
    
    
    So if you have a kernel git tree (and I'm here assuming "origin"
    points to my trees), and you do
    
    
    
    
         git fetch --tags origin
    
    
    
    
    you _will_ now see the new "v5.12-rc1-dontuse" tag. But git won't
    remove the old v5.12-rc1 tag, because while git will see that it is
    not upstream, git will just assume that that simply means that it's
    your own local tag. Tags, unlike branch names, are a global namespace
    in git.
    
    
    
    
    So you should additionally do a "git tag -d v5.12-rc1" to actually get
    rid of the original tag name.
    
    
    
    
    Of course, having the old tag doesn't really do anything bad, so this
    git process thing is entirely up to you. As long as you don't _use_
    v5.12-rc1 for anything, having the tag around won't really matter, and
    having both 'v5.12-rc1' _and_ 'v5.12-rc1-dontuse' doesn't hurt
    anything either, and seeing both is hopefully already sufficient
    warning of "let's not use that then".
    
    
    
    
    Sorry for this mess,
                 Linus
    
    
    
    
    
  • A warning about 5.12-rc1

    Linus Torvalds has sent out a note telling people not to install the recent 5.12-rc1 development kernel; this is especially true for anybody running with swap files. "But I want everybody to be aware of because _if_ it bites you, it bites you hard, and you can end up with a filesystem that is essentially overwritten by random swap data. This is what we in the industry call 'double ungood'." Additionally, he is asking maintainers to not start branches from 5.12-rc1 to avoid future situations where people land in the buggy code while bisecting problems.

  •  
  • Linux 5.12-rc2 Likely Coming Early Due To That Nasty File-System Corruption Bug

    Linus Torvalds has now warned developers over using Linux 5.12-rc1 as a basis for their future branches and is looking to release 5.12-rc2 ahead of schedule as a result of that problematic file-system corruption bug stemming from a swap file bug. 

Games: Godot, Artifact, Loop Hero, and Urtuk: The Desolation

  • Godot Showcase - Primal Light developer interview

    Welcome to the fourth developer interview following the introduction of the Godot Showcase page! This week, we are interviewing the studio Fat Gem about their first game Primal Light.

  • Valve gives up on Artifact setting it free with Artifact Classic and Artifact Foundry | GamingOnLinux

    Valve's Dota themed card game Artifact has now well and truly failed, as they've now stopped the 2.0 redevelopment which is now named Artifact Foundry with the original as Artifact Classic and both now free to play. In a post titled "The Future of Artifact", Valve mentioned how the player count fell off dramatically and it was pretty much dead shortly after being released. Even though the big 2.0 revamp was far along in development, they've now formally and totally shelved it as they "haven't managed to get the active player numbers to a level that justifies further development at this time".

  • Loop Hero is out now and I'm going to need help to tear myself away from it | GamingOnLinux

    Loop Hero, probably the only titles I've pre-ordered in the last few years is officially out now and I really will need some help to pull myself away from running just one more loop. It's such a strange and beautifully intoxicating mix of genres. For each loop through you're placed into a world full of nothing but a path and it's up to you to build up the world each time. You do this through your deck of cards, while the hero automatically loops around the path and fights enemies along the way without your input. Even though you don't have direct control, there's quite a lot of strategy involved in it.

  • Dark low-fantasy tactical survival RPG 'Urtuk: The Desolation' is out now | GamingOnLinux

    Urtuk: The Desolation from David Kaleta presents you with a dark world in a low-fantasy settings where you guide a team of survivors through a ruined world. Note: key provided by the developer. Hitting nearly one thousand user reviews and a Very Positive rating on Steam overall, Urtuk: The Desolation seems to have managed to hit a sweet spot. Giving you tough turn-based combat, with a character progression system that sees you extracting skills and traits from fallen enemies. It's a bit of a gross world and the main character, Urtuk, is an escaped subject of experimentation with a severe mutation and worsening health. The idea is to eventually find a cure but getting there will be tough.

today's howtos

  • How to find duplicate files in Linux? Help is here with the fdupes command! - Webleit.info

    Fdupes is a command line tool that allows you to find all duplicate files through the console. The advantage over using graphical tools like fslint is of course the speed. At the end of the day, there is nothing faster and more convenient than the Linux console. Why should we look for duplicate files in Linux? No matter what operating system you use sooner or later, your computer will contain many files of different sizes, and if you’re not careful enough, repeating them can cost you disk space that you need. For example, you inadvertently downloaded the same ultra HD movie with 40 giga bytes twice.

  • How to Install Moodle with Nginx and Let's Encrypt SSL on Ubuntu 20.04

    Moodle is a free and open-source Learning Management System written in PHP. It provides a way for tutors and instructors to create courses for their students or learners. Moodle provides a robust and secure integrated system and comes with a custom dashboard that helps users to access current, past or future courses, as well as review pending work. It is used by many schools, universities, and organizations across the globe and provides a better learning experience. It provides a rich set of features including, wiki, grading, assignment submission, online quizzes, discussion boards, and more. In this tutorial, we will show you how to install Moodle with Nginx web server and Let's Encrypt SSL on Ubuntu 20.04.

  • Install WordPress Automatically on Ubuntu 20.04 using WordOps

    WordOps is a simple tool that provides the ability to deploy WordPress sites from the command line using an optimized LEMP stack. The LEMP software stack consists of a group of software that describes a Linux Operating System, an Nginx web server (pronounced engine-x), a MySQL database with the dynamic processing being handled by PHP. LEMP is an acronym for Linux, Engine-x (Nginx), MySQL and PHP. WordOps simplifies so much of the process of installing and configuring all the packages from the LEMP stack needed to deploy a site while taking care of creating virtual hosts in Nginx, installing WordPress, and even gets you a SSL certificate. It also installs some components that allow you to see statistics about the server’s workload. In this tutorial we’ll use WordOps to quickly and easily install WordPress on an Ubuntu 20.04 machine, and we’ll check out and explain some of the extra features that WordOps offers.

  • How to Find Out When a Webpage Was Published - Make Tech Easier

    When you’re doing research on a topic, it’s vital to ensure your sources are up to date. If you’re writing an academic paper, dates of publication are often required in the citations. The majority of the time, getting the date is easy: simply look on the site and find the published date to find how recent it was. Things get a little more complicated when there is no date listed on the webpage. When this happens, how do you know when a webpage was published?

  • How to install Wireshark 3.4.3 on a Chromebook

    Today we are looking at how to install Wireshark 3.4.3 on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

  • Another Piece For The Home Network Puzzle – A Return To Cisco IOS! – Jon's FOSS Blog

    I’ve missed the good old days of configuring and setting up good quality switching hardware (like the big, huge Cisco switches and routers I used to experiment on with their IOS command line interface). I recently ordered this newer, smaller Cisco switch which can also provide power to a new “prosumer” WiFi AP (no power cables needed).

  • Making environment variables accessible in front-end containers - Red Hat Developer

    When building a container for a single-page application using any modern JavaScript framework (such as Angular, React, or Vue.js), you might find that the configuration settings are different depending on where the container will run. A typical case would be the base URL for your API, which will differ depending on whether you are testing the application or deploying it into production. Developers usually solve this problem using environment variables. Environment variables typically work on the backend because that is where code runs. But what if your application lives in the user’s browser? There are many ways around this limitation. In some cases, you might build a server whose endpoint holds the necessary parameters. Another workaround is to use PHP to inject the environment variables as globals in the JavaScript code. Both of these options work, but it would be ideal to inject the environment variables as part of the container build process. That way, you don’t have to change the codebase, and you can still deliver the application content using a static web server like NGINX. This article shows you how to inject environment variables directly into your codebase as you build your container.

  • The Strange Case of How We Escaped the Docker Default Container

    TL;DR During an internal container-based Red Team engagement, the Docker default container spontaneously and silently changed cgroups overnight, which allowed us to escalate privileges and gain...

  • How to copy and paste between host and VM