“You have rights. The right to privacy, freedom of thought, freedom of speech and the right to read. In this context, Libreboot gives you these rights. Your freedom matters. Right to repair matters. Many people use proprietary (non-libre) boot firmware, […]
this setup is a combination of an offgrid 12v solar system and a 12v pump… i still have to find “the perfect pump”. what 12v pump to use? “Centrifugal pumps in 12v continuous operation have a low voltage and are […]
Solar Panel 100W (12V?) and Battery Charger (12V) https://www.offgridtec.com/en/complete-systems/solar-system-autarkic/offgridtec-solar-bausatz-basic-starter-100-watt-12v.html Solar Panel Module Voltage: (Vmp) 17,6V Victron BlueSolar PWM-Light 12V 24V 10A -> DataSheed Maximum solar voltage: 28V possible alternative: Steca Solsum 8.8F 12Vor better: Steca-LCD-Display-PR-2020 12V -> 5V Car USB […]
want to buy one? check on ebay for “sun” and “sparc” recipe: what you will need: a T1000 alternatively: ear sealing headphones + music. a LAN switch with DHCP-server/router attached LAN cables (atleast 4x (1x DHCP-server, 1x workstation/client, 1x server […]
Crowd funding platforms are great – i love em. They actually do what Banks are supposed to do – get the money where it can build great products and foster innovation. problem: as more and more money flows through crowdfunding […]
Update: 2024 unfortunately also some ARM CPUs are affected by Spectre v1 and v2. Update: 2020.03 “The newly developed Rowhammer- attack TRRespass can crack the RAM-a security mechanism by many DDR4-DRAM-modules as well as LPDDR4 Chips. Until now, these were […]
update: 2024-04: can the PI be trusted? while many cool projects are made with Raspberry PIs, including camera surveillance projects, the PI’s design requires a GPU binary blob driver to be loaded BEFORE the OS is loaded… this is Open […]
update 2022: build a Kindle like eBook reader 🙂 with this Display 🙂 (raspberry compatible) https://e-radionica.com/en/inkplate-6.html (that is the 6″ inch display) there is also a 10″ inch display https://e-radionica.com/en/blog/inkplate-10-crowdfunding-campaign-is-now-live/ https://www.crowdsupply.com/e-radionica/inkplate-6plus by TAVU Limited Liability Company for the Design and […]
70% of decision makers increase tech budget in 2018, slightly higher than 2017. top technologies: CyberSecurity (53%) Hardware upgrades (47%) cloud services (43%) software (40%) BigData Analytics (20%) Internet of Things (18%) 35% training employees 29% want to hire new […]
what to do to improve online privacy? use a privacy respecting DNS server by https://www.opennic.org/ for example: 195.10.195.195 (not google’s (8.8.8.8)) use Freifunk use a VPN such as: mullvad VPN https://mullvad.net/en/help/pricing-discounts/ https://mullvad.net/en/check/ Mozilla launched it’s own VPN service https://vpn.mozilla.org/ use tor […]
monitor (andoird) devices with bpf: https://www.socallinuxexpo.org/sites/default/files/presentations/bcc-scale.pdf so guess “monitoring” is about two things: availability and performance: detect performance bottlenecks get informed if parts (harddisks) / servers have failed / are about to fail security: detect, report and (if possible) automatically […]
You might want to checkout very basic sequential write/read benchmark with dd. You might also want to checkout: cross os harddisk benchmark iozone and java. ============ OS and Kernel Linux server4.localdomain 4.15.7 #1 SMP Sun Mar 4 16:43:40 CET 2018 […]
if you try to play a video with 1080p and your CPU usage goes up almost 100% you know that the GPU is doin’ nuthin’ and all the encoding is done via CPU which also reduces framerate. luckily the fix […]
Update: 2018.12: ForeShadow – guest reading Level1 Cache of host ForeShadow (known as L1 Terminal Fault (L1TF) by Intel)[1][2] is a vulnerability that affects modern microprocessors that was first discovered by two independent teams of researchers in January 2018, but […]
While the Supermicro X8DT3 CPU: 2x Xeons with 2x Intel Xeon(R) CPU E5504 @ 2.00GHz and RAM: 64GB RAM EEC Dual-Powersupply is a great mainboard with java remote web IPMI console that allows you to access the bios and remote […]
2018-04: RISC-V CPUs not affected by spectre & meltdown “No announced RISC-V silicon is susceptible, and the popular open-source RISC-V Rocket processor is unaffected as it does not perform memory accesses speculatively.” (2018-01-05 src) “If you’re selling an IoT sensor […]
update: 2023-08 software support wise that 32bit ARMv7 xu4 SoC has aged EXTREMELY WELL 😀 thanks all involved! (check prices on ebay) here is the “official” ArmBian (Debian 12 “bookworm” for ARM) image for the odroid xu4 “inofficial” Debian 12 […]
to protect users’s privacy: NEVER GIVE IT YOUR WIFI PASSWORD! pros: integrates well with linux (plug into usb behaves like flashdrive) very power efficient reader cons: like Alexa, it’s a spying machine The kindle’s battery lasts very long up to […]
Wifi Modes of an Access point: DLink has painted a nice overview over the possible different modes of an Accesspoint: cybersec: from great wifi modes that allow bridging two wifi networks, it would be GREAT if vendors test their products […]
smart and ssds? and: is smart really that smart? to do regular smart, is better than doing no smart, but as confirmed here, it can be only minutes of time from reporting an error-problem to complete harddisk failure, so smart […]
9. September 1986 At the Palladium in Manhattan, New York, Compaq Computer introduces the Compaq Deskpro 386, the first 80386-based personal computer offered by a major computer manufacturer. The Model 40 features a 16 MHz Intel 80386 and 40 MB […]
it is amazing on how many chips linux can run https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch CPUs you probably have NEVER heared of 😀 OpenRISC – Academic and non-commercial use Being open source, OpenRISC has proved popular in academic and hobbyist circles. For example, Stefan […]
Some people think it is ridiculous to measure the power consumption of computers. Imho it is important for servers but also if workstation uses 50 Watts idle or 10 can also make a difference when it is used a lot […]
What are kernel modules? What exactly is a kernel module? Modules are pieces of code that can be loaded and unloaded into the kernel upon demand without rebooting the system. Without modules, we would have to build monolithic kernels and […]
interrupts are all about devices that produce data that is written to buffers (ram-like-chips) that need to be processed in a timely manner. be it keyboard or mouse input buffers. (you don’t want to wait 5minutes before your key-press is […]
if you want to find out what chipset / mainboard your PC / Laptop / Notebook is using and other details about the hardware. unfortunately this is not a straight forward task… and works better / worse depending on the […]
update: while this benchmark is still valid, very simple, very cross platform, with a focus on the team cpu (why is there no multi core md5? (putting many many core arm servers at disadvantage) + harddisk (two very important components) […]
this script will have to be run as root. it will ask the user, if the user is satisfied with linux running on this hardware, can even give a comment, then it tries to detect the model of one’s motherboard, […]
… and even more importantly – will it run Linux? Mar 22, 2017 Betakit Betakit: Volkswagen Partners with D-Wave to Adopt Quantum Technology Author: Madonna Dennis “Volkswagen says they are the first automakers to work with quantum computers, partnering with […]
“The Unix Philosophy in One Lesson” “All the philosophy really boils down to one iron law, the hallowed ‘KISS principle’ of master engineers everywhere:” “Keep It Simple, Stupid” or “Keep It Super Simple” (less offensive) The Unix philosophy emphasizes building […]