Raspberry Pi 4 on sale now from $35

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Raspberry Pi 4 Model B

Here are the highlights:

  • A 1.5GHz quad-core 64-bit ARM Cortex-A72 CPU (~3× performance)
  • 1GB, 2GB, or 4GB of LPDDR4 SDRAM
  • Full-throughput Gigabit Ethernet
  • Dual-band 802.11ac wireless networking
  • Bluetooth 5.0
  • Two USB 3.0 and two USB 2.0 ports
  • Dual monitor support, at resolutions up to 4K
  • VideoCore VI graphics, supporting OpenGL ES 3.x
  • 4Kp60 hardware decode of HEVC video
  • Complete compatibility with earlier Raspberry Pi products

Source: Raspberry Pi 4 on sale now from $35 – Raspberry Pi

Linux PCs, servers, gadgets can be crashed by ‘Ping of Death’ network packets

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With CVE-2019-11477, a string of TCP SACK responses will cause the Linux kernel to unexpectedly hit an internal data structure limit, triggering a fatal panic. The others affecting Linux will force the system to consume resources, thus slowing it down, as Red Hat explained in its technical summary today.

Source: Sad SACK: Linux PCs, servers, gadgets can be crashed by ‘Ping of Death’ network packets • The Register

How to Free up Unused Memory in Ubuntu/Linux Mint

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In this tutorial, we will see how to use the terminal to clean up unused memory that was not released properly after being used by your system. No need to use any third-party software, just a few commands will do the job pretty easily.

Source: How to Free up Unused Memory in Ubuntu/Linux Mint

Have a little problem with a server freezing which might be memory related.  This simple tutorial was very helpful.

You can free up unused memory under Ubuntu/Linux Mint using this command:

sudo sysctl -w vm.drop_caches=3

SpaceX launches first batch of 60 internet satellites in landmark mission

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SpaceX ultimately wants Starlink to grow to include potentially thousands of satellites over the next few years. The company says it could make available low-cost internet for a significant portion of the world’s population that isn’t yet online and offer a competitive alternative for people who aren’t happy with their broadband provider.

Source: SpaceX launches first batch of 60 internet satellites in landmark mission – CNN

AI predicts PUBG player placement from stats and rankings

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“In this paper specifically, we have tried to predict the [ranking] of the player in the ultimate survival test,” the project’s contributors wrote in a preprint paper (“Survival of the Fittest in PlayerUnknown’s BattleGrounds“) published on Arxiv.org. “We have applied multiple machine learning models to find the optimum prediction.”

Source: AI predicts PUBG player placement from stats and rankings | VentureBeat

90% of blockchain-based supply chain projects are in trouble

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Despite the great amount of time and effort invested in pilot projects aiming to use distributed ledgers to verify authenticity, improve traceability, and build more trust into supply chain transactions, only 19% of respondents ranked blockchain as a very important technology for their business, the company said in a release. Only 9% have invested in it.

Source: Gartner Survey: 90% of blockchain-based supply chain projects are in trouble | Modern Consensus | Cryptocurrency and blockchain news and opinions

‘Secret’ City of Heroes emulator operators address SCORE leak drama, rebut personal info database rumor

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The CoH Survivors Facebook page has absolutely exploded in fury and hurt over the news. While some folks are feeling vindicated because their previous claims about the secret server have been proven true, others are concerned that the publicity will bring a(nother) NCsoft C&D down on the operators’ heads.

Source: ‘Secret’ City of Heroes emulator operators address SCORE leak drama, rebut personal info database rumor | Massively Overpowered