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Slashdot reader PrimeGoat has used Linux for 20 years, "10 of which were during my career as a Linux sysadmin..." "However, there's more to being a sysadmin than just knowing how to use Linux." There are best practices that evolve, new methods of doing things and new software that constantly comes out and evolves. This is where my challenge comes. In 2012 I stopped my career as a Linux sysadmin... There's a lot of stuff that I missed out on. I'm wondering what I should do to refresh my skills and to catch up on what I've missed? An obvious solution would be to get a job as a sysadmin again, but this probably isn't going to happen, as I'm changing my trajectory. I'm currently training to become a fullstack web developer, but still have a need to update my sysadmin skills and keep them fresh... Any suggestions on what actions to take on my own to catch up and keep fresh? Leave your thoughts in the comments. What's the best way to refresh both your Linux and sysadmin skills?

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The director of astrobiology at Columbia University saw something this week that he just had to respond to: Elon Musk "talking about sending 1 million people to Mars by 2050, using no less than three Starship launches per day (with a stash of 1,000 of these massive spacecraft on call)." Iwastheone shared this article from Scientific American: The martian radiation environment is a problem for human explorers that cannot be overstated... For reasons unclear to me, this tends to get pushed aside compared to other questions to do with Mars's atmosphere (akin to sitting 30km [18.6 miles] above Earth with no oxygen), temperatures, natural resources (water), nasty surface chemistry (perchlorates), and lower surface gravitational acceleration (1/3rd that on Earth). But we actually have rather good data on the radiation situation on Mars (and in transit to Mars) from the Radiation Assessment Detector (RAD) that has been riding along with the Curiosity rover since its launch from Earth. The bottom line is that the extremely thin atmosphere on Mars, and the absence of a strong global magnetic field, result in a complex and potent particle radiation environment. There are lower energy solar wind particles (like protons and helium nuclei) and much higher energy cosmic ray particles crashing into Mars all the time. The cosmic rays, for example, also generate substantial secondary radiation -- crunching into martian regolith to a depth of several meters before hitting an atomic nucleus in the soil and producing gamma-rays and neutron radation... [I]f we consider just the dose on Mars, the rate of exposure averaged over one Earth year is just over 20 times that of the maximum allowed for a Department of Energy radiation worker in the US (based off of annual exposure).... [Y]ou'd need to put a few meters of regolith above you, or live in some deep caves and lava tubes to dodge the worst of the radiation. And then there are risks not to do with cancer that we're only just beginning to learn about. Specifically, there is evidence that neurological function is particularly sensitive to radiation exposure, and there is the question of our essential microbiome and how it copes with long-term, persistent radiation damage. Finally, as Hassler et al. discuss, the "flavor" (for want of a better word) of the radiation environment on Mars is simply unlike that on Earth, not just measured by extremes but by its make up, comprising different components than on Earth's surface. To put all of this another way: in the worst case scenario (which may or may not be a realistic extrapolation) there's a chance you'd end up dead or stupid on Mars. Or both.

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It's a dog's life. You and your furry friends will love these healthy meals delivered to your door.

Looking for the best DNA test kits from the best testing services available to buy now? Here are your top options.

Today Boeing's new 777X aircraft completed its maiden flight, reports CNBC: The plane is the largest twin-engine jet ever built and has a wingspan so wide — more than 235 feet — it features folding wingtips that reduce that width by more than 20 feet so the plane can fit into various airport taxiways and gates. The 777X-9 is slightly longer than Boeing's most iconic plane: the hump-backed 747, which is fading away as airlines opt for twin-engine aircraft that require less fuel... The 777X, which lists for $422.2 million although airlines usually receive discounts, can fit up to 426 passengers in a two-class configuration. Boeing had 344 firm orders for the 777X at the end of the third quarter, according to a company filing, and Emirates is its biggest single customer. By allowing more passengers on a single flight, the plane's wide-body design achieves a smaller carbon footprint, Forbes reports. And an expected shortage of trained pilots might also help convince airlines to use the new plane. The decision may also be driven by future airport and airspace congestion. With passenger numbers expected to double over the next 20 years, it will be a real challenge for infrastructure to keep up. Fewer planes required to fly all those people would be an advantage... More planes flying requires more pilots trained to fly them and an over-reliance of narrow-bodies exacerbates the problem. The 777X can be flown by current generation 777-trained pilots, Boeing says. It's a claim that will no doubt undergo more serious scrutiny by regulators following the 737 MAX tragedies — as will the whole aircraft — but that may be in Boeing's favor, helping to restore confidence.

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China eclipsed the US as the largest smartphone market on Earth years ago, but now Americans can't even claim second place. Counterpoint Research estimates that India overtook the US to become the second-largest market, with 158 million phones shipp...

Slashdot reader JoeyRox shares a disturbing story about a Boeing 737 NG flight carrying 128 passengers that crashed in 2009, killings its three pilots, another crew member and five passengers. But "the Dutch investigators focused blame on the pilots for failing to react properly when an automated system malfunctioned and caused the plane to plummet into a field," the New York Times reported this week. "The fault was hardly the crew's alone, however. Decisions by Boeing, including risky design choices and faulty safety assessments, also contributed to the accident on the Turkish Airlines flight." But the Dutch Safety Board either excluded or played down criticisms of the manufacturer in its final report after pushback from a team of Americans that included Boeing and federal safety officials, documents and interviews show. The crash, in February 2009, involved a predecessor to Boeing's 737 Max, the plane that was grounded last year after accidents in Indonesia and Ethiopia killed 346 people and hurled the company into the worst crisis in its history. A review by The New York Times of evidence from the 2009 accident, some of it previously confidential, reveals striking parallels with the recent crashes — and resistance by the team of Americans to a full airing of findings that later proved relevant to the Max. In the 2009 and Max accidents, for example, the failure of a single sensor caused systems to misfire, with catastrophic results, and Boeing had not provided pilots with information that could have helped them react to the malfunction. The earlier accident "represents such a sentinel event that was never taken seriously," said Sidney Dekker, an aviation safety expert who was commissioned by the Dutch Safety Board to analyze the crash. Dekker's study accused Boeing of trying to deflect attention from its own "design shortcomings" and other mistakes with "hardly credible" statements that admonished pilots to be more vigilant, according to a copy reviewed by The Times. [That 2009 study was never made public -- until Tuesday, after the New York Times had published its story. The same day Boeing announced they'd stopped production on the 737 Max.] The Times also reports that after the first fatal 737 Max crash in 2018, one Ohio State professor who has advised the FAA sent an email to a colleague citing research from the 1990s on automation-triggered disasters -- as well as Boeing's 2009 crash. "That this situation has continued on for so long without major action is not how engineering is supposed to work. After the second fatal 737 Max crash, he told he Times he was appalled. "This is such of a failure of responsibility," he said. "We're not supposed to let this happen.

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When Jeff Bezos accused the National Enquirer of trying to blackmail him with leaked text messages, this raised a question: how did those messages escape Bezos' phone? Apparently, they might have come from Bezos' girlfriend Lauren Sanchez. Wall Str...

Slashdot reader SmartAboutThings writes: While Microsoft Edge is right on track to replace Internet Explorer, it seems that the last one is a bigger security liability then you may think. In a newly released advisory, the Cybersecurity and Infrastructure Security Agency (CISA) [an agency within America's Department of Homeland Security] is warning users about an IE vulnerability. To keep your personal data safe and don't expose your PC to dangerous malware, the agency further recommends "Consider using Microsoft Edge or an alternate browser until patches are made available." As a reminder, this is not the first international agency that ranks IE's security very low, as Germany's BSI shared a couple of months back a similar study. Lifehacker's senior technology editor notes that the new vulnerability affects "various permutations of Internet Explorer 9, 10, and 11 across Windows 7, 8.1, and Windows 10 (as well as various editions of Windows Server). "The bad news is that Microsoft won't likely patch this problem until February -- when the next major batch of security updates hits." But they offer a work-around of their own until then which involves opening an administrative command prompt to restrict access to the deprecated JScript library used by the exploit. Otherwise, don't click on links from strangers, and if you're using IE switch to Edge. And Microsoft explains what will happen if you used Internet Explorer to visit a web site designed to exploit the vulnerability. "If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. "An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights."

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The New York Times reports on "Ring Neighbors," a local social networking service launched by Amazon in 2018 where users "share videos of delivery people carelessly throwing packages, or failing to wait for an answer at the door; others share footage of mail people navigating treacherous ice, or merely waving at the camera." On a U.S. Postal Service forum, a mail carrier asked: "Anyone else feel kind of creeped out that people are recording and watching you, up close, deliver mail to their house or is it just me...?" The company also selects videos from its users to be shared on Ring TV, a video portal run by the company, under categories such as "Crime Prevention," "Suspicious Activity" and "Family & Friends." The videos are, essentially, free ads: The terrifying ones might convince viewers to buy cameras of their own; funny or sweet ones, at a minimum, condition viewers to understand front-door surveillance as normal, or even fun... Ring videos also provide a constant stream of news and news-like material for media outlets. The headlines that accompany those videos portray an America both macabre and surreal: "Screams for Help Caught on Ring Camera," in Sacramento; "Man pleads for help on doorbell camera after being carjacked, shot in Arizona," in Phoenix; "WOMAN CAUGHT ON MEDFORD DOORBELL CAMERA WITH STOLEN GUN," in Oregon; "Alien abduction' caught on doorbell cam," in Porter, Tex. (it was a glitch); "Doorbell camera captures Wichita boy's plea for help after getting lost." And then there are videos like one shared by Rob Fox, in McDonough, Ga., in which his dog, locked out of the house, learns to use his doorbell. Mr. Fox posted the video to Facebook and then Reddit, from which the story drew news coverage. Ring contacted him, too, he said, to ask whether the company could use the footage in marketing materials. Elsewhere, the footage is billed as entertainment. In early December, "America's Funniest Home Videos," which has been aggregating viewer videos since the 1980s, released a best-of compilation: "Funny Doorbell Camera Fails." It is composed almost entirely of people falling down... Home surveillance means you're never quite home, but you're never completely away from home, either. Footage from one Florida camera showed a bearded man who "licks the doorbell repeatedly. Then he stands back and stares," according to the Times. And they also report that Ring cameras are now also being stolen, "leaving their owners with a final few seconds of footage — a hand, a face, a mask — before losing their connections."

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Hulu's animated Marvel show lineup won't be quite as extensive as you might have hoped. Hollywood Reporter understands that Marvel has cut two of the shows, Howard the Duck and Tigra & Dazzler, in favor of focusing its energy on the remaining MO...

schwit1 quotes CNN's report on a software engineer who who really loves Star Wars costumes: "I kind of incorporated all of the things that I've learned in 3-D printing and DIY into this project," said Nils Rasmusson. Over the course of nine months, he printed the suit and put it together. "I had to figure out — how do you put all of these pieces together? There's no tutorial or instructions on this," he said. The helmet alone is made up of 19 different pieces fabricated on the printer. Rasmusson said he used five printers, humming for about 400 to 600 hours, to fabricate the suit out of plastic filament. It's even bulletproof. His friend works for a company that bulletproofs cars...

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Electronic component distributor Digi-Key will be producing a small manufacturing run of the "open hardware" ereader from the Open Book Project, reports Gizmodo: The raw hardware isn't as sleek or pretty as devices like the Kindle, but at the same time there's a certain appeal to the exposed circuit board which features brief descriptions of various components, ports, and connections etched right onto the board itself for those looking to tinker or upgrade the hardware. Users are encouraged to design their own enclosures for the Open Book if they prefer, either through 3D-printed cases made of plastic, or rustic wooden enclosures created using laser cutting machines. With a resolution of just 400x300 pixels on its monochromatic E Ink display, text on the Open Book won't look as pretty as it does on the Amazon Kindle Oasis which boasts a resolution of 1,680x1,264 pixels, but it should barely sip power from its built-in lithium-polymer rechargeable battery -- a key benefit of using electronic paper. The open source ereader -- powered by an ARM Cortex M4 processor -- will also include a headphone jack for listening to audio books, a dedicated flash chip for storing language files with specific character sets, and even a microphone that leverages a TensorFlow-trained AI model to intelligently process voice commands so you can quietly mutter "next!" to turn the page instead of reaching for one of the ereader's physical buttons like a neanderthal. It can also be upgraded with additional functionality such as Bluetooth or wifi using Adafruit Feather expansion boards, but the most important feature is simply a microSD card slot allowing users to load whatever electronic text and ebook files they want. They won't have to be limited by what a giant corporation approves for its online book store, or be subject to price-fixing schemes which, for some reason, have still resulted in electronic files costing more than printed books.

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There have been Super Bowl ads for electric cars before, but they've tended to treat EVs as novelties. BMW's 2015 ad for the i3 was practically a crash course in EVs, while Audi's 2019 spot was more to advertise electrification than the still-unavai...

NASA's Mars rover Curiosity "lost its orientation...partway through its last set of activities," reported a planetary geologist on the rover's team Monday. Curiosity had lost track of its position in space and the position of its various parts like its robotic arm. "Thus, Curiosity stopped moving, freezing in place until its knowledge of its orientation can be recovered. Curiosity kept sending us information, so we know what happened and can develop a recovery plan...." Space.com now shares the rest of the story: "We learned this morning that plan was successful and Curiosity was ready for science once more!" mission team member Scott Guzewich, an atmospheric scientist at NASA's Goddard Space Flight Center in Greenbelt, Maryland, wrote in another update on Tuesday. This latest recovery shouldn't come as a shock; Curiosity has overcome numerous setbacks since landing inside Mars' 96-mile-wide (154 kilometers) Gale Crater in August 2012. The rover has had issues with its memory and its wheels, for example, but has always bounced back... Curiosity is now climbing the foothills of Mount Sharp, the 3.4-mile-high (5.5 km) mountain that rises from Gale Crater's center. The rover is reading the rocks for clues about Mars' long-ago climate transition, which turned the Red Planet from a relatively warm and wet place to the cold desert world it is today. CNET notes that Curiosity is currently NASA's only working rover on Mars.

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From China to South Korea, Scotland to Russia, the world reacts to a novel health threat.

So much for the Uncharted movie having a reasonably firm release date. Sony's Columbia Pictures has delayed the release of the game-inspired swashbuckler from its earlier December 18th, 2020 slot to March 5th, 2021. There wasn't a specific explanat...

Slashdot reader McGruber shares the news that several of Alan Turing's historic personal effects have been recovered nearly 36 years after they were stolen. From a report: In filings in the U.S. District Court of Colorado Friday, federal officials say they seized the British mathematician's Princeton University degree, his Order of the British Empire medal and several photos, school reports and letters from his time at Sherborne School, a boarding school in Dorset, England. According to the seizure notices, a woman named Julia Turing approached the University of Colorado Boulder in January 2018, saying she wanted to loan Alan Turing's memorabilia to the library. Archivists at the library determined that the items were stolen from Sherborne in 1984... Julia Turing isn't related to Alan Turing, but she changed her last name from Schwinghamer in 1988, according to the complaint... A month after she reached out to the University of Colorado Boulder, federal officials searched Julia Turing's home in Conifer and recovered the items. The Guardian shared this quote from a member of the government committee that decided Turing should appear on the U.K.'s new £50 note. "[He was] the father of computer science, a significant influence on the modern field of artificial intelligence and most importantly, his work at Bletchley Park during the second world war led a team of code-breakers to crack the German Enigma code."

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Apple won't have to pay WiLan as much as expected for alleged patent violations. A retrial jury has reduced the damages from WiLan's lawsuit from the original $145.1 million (determined in 2018) down to slightly over $85.2 million. That's still no...

Id software has released a new trailer for their upcoming Doom sequel set on a demon-infested planet Earth in the year 2151. And GameSpot has uploaded a 10-minute clip of gameplay while Collider released 15 minutes. Collider writes: Doom Eternal takes everything that was gloriously batshit about Doom 2016, throws it in a Lamborghini full of Slayer albums and catapults it into the sun. This game is out of its goddamn mind in the best possible way, and I literally cannot wait to get my hands on the full version... The Fortress of Doom is massive. I wasn't able to access every area, and could only guess at the function of some of the areas I did see. One section had the original Doom Marine costume on display in a glass case, and the game's director, Hugo Martin confirmed that the skin is an unlockable. Moreover, he indicated that there are several unlockable player skins in the game, including one he was clearly excited about but couldn't reveal, saying that it was still in the licensing approval stage... Doom Eternal, like its predecessor, is a fast game, pitting you against hordes of powerful enemies that force you to constantly be on the move and quick-swapping weapons to inflict maximum damage while avoiding death. You have a few tools at your disposal to earn guaranteed life, ammo, and armor, which are the over-the-top glory kills, the terrifying chainsaw, and the brand-new flame belcher respectively. Glory kills are special instant-death maneuvers you can unleash on enemies after staggering them, and the addition of a retractable arm blade has heightened the graphic absurdity of them to such a degree that I was giggling like an idiot every time I pulled one off. I spent the next three hours murdering my way across three massive levels that were incredibly varied in terms of design, beginning in a blasted post-apocalyptic city, then moving to a vast overgrown temple, and finally ending up in a heavily-fortified arctic base... Each stage had a completely different feel -- the city was very ground-based, with dark subway tunnels and skeletal office buildings. The temple was spread out across what felt like miles, with an unexpected amount of verticality and traversal thanks to the new climbing mechanic. Yep, Doom Guy can now cling to certain walls, as well as swing from poles to extend his jump and gain access to distant ledges. The climbing controls are a bit funky, like Spider-Man with a rotator cuff injury, but the traversal puzzles are fun and satisfying, and allow for some truly massive environments... Martin promised that players will continue to be introduced to new enemies and environments right up until the end of the 22+ hour campaign. He describes Doom Eternal as a thinking person's action game, and that the team's goal was to create a combat puzzle worth your time. DOOM Eternal is scheduled to be released on March 20th.

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