when trying to update CentOS8 with PostgreSQL installed in this tutorial this errors shows up: repo: downloading from remote: pgdg94 error: Status code: 404 for https://download.postgresql.org/pub/repos/yum/9.4/redhat/rhel-8-x86_64/repodata/repomd.xml (https://download.postgresql.org/pub/repos/yum/9.4/redhat/rhel-8-x86_64/repodata/repomd.xml) PostgreSQL 9.4 for RHEL/CentOS 8 – x86_64 261 B/s | 162 B 00:00 […]
convenience vs security problem: remote support via internet in COVID19 pandemic days is basically a must for many companies, but does it have to run non-stop on computers that control sensitive machines and systems such as energy and water-supply? ABSOLUTELY […]
for this low price (below 10 Bucks) it performs well as an “overall” webcam with fish eye optics. Camera module was purchased on Amazon, in search for something that could be used in Medical scenario to take LED illuminated close […]
… this Atari TT030 is 30 years old… and it still works X-D TOS (The Operating System; also Tramiel Operating System, from Jack Tramiel, owner of Atari Corporation at the time) is the operating system of the Atari ST range […]
to learn something new is fun to have one’s head messed up… not so much… ever heard of Buckminster Fuller? the guy wo inveted the “fish car” and big fan of geodesic domes the idea was great… but the marketing? […]
not sure if the news rang through… the Amazon Cloud (AWS) guy will be the new CEO of Amazon. What cloud? Amazon “cloud” Hetzner “cloud” cloud (centralized digital infrastructure) can be designed / implemented in different ways. from: the user/admin […]
everyone wants a functional website is secure loads within max 10sec (absolute maximum imho) that actually works (menu is working, links not dead…) is rich in high quality content can be found via search engines a beautiful website (but not […]
what it is: it is a very detailed, tedious, noice physics, nice graphics voxel based build-stuff space, universe and planets simulation not like kerbal space program but equally tricky so definitely more aimed at the tech savvy engineer than at […]
some gui programs like gparted (very nice harddisk partitioning program) won’t start as root. hostnamectl; # tested on Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-13-amd64 Architecture: x86-64 su – root; # become root gvim; # fails with E233: […]
# should work as simple as ffmpeg -i “input.mkv” “output.mp4” # tested on hostnamectl; Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-13-amd64 Architecture: x86-64 ffmpeg -version ffmpeg version 4.1.6-1~deb10u1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 […]
BeyondCorp Google’s new Approach to Security – we need to know EVERYTHING about the user – in order to trust the user – The Age of Surveillance Capitalism first of… the good about JavaScript is (always say something positive […]
vs activity on StackOverflow: https://insights.stackoverflow.com/survey/2020#technology-most-loved-dreaded-and-wanted-languages-loved comment: there is a saying “never trust a chart, that you did not fake yourself” X-D (which probably just means: the data will never be a perfectly representation of reality (because some users block JavaScript […]
SecurityLab, [03.12.20 11:15] Vulnerabilities in open source software can go undetected for more than four years before being discovered. According to the GitHub State of the Octoverse annual report, the use of open source projects, components, and libraries is more […]
accroding to BleepingComputer: “zero-day vulnerability in their VPN products” (so not FallOut of SolarWinds-orion-auto-update-software-supply-chain) “…have information about hacking of a well-known firewall vendor and other security products by this they are silent and do not release press releases for their […]
for some reason… did ext3 on RAID1 with two disks (seagate + wd) of different sized (2TB but they (of course) are not exactly 2TB) watch out: shingled hdd are not good for RAID! not sure where the problem here […]
this script is for cront-job regular measurement of the available (download) bandwidth, by downloading a 100MByte dd crated (https://dwaves.de/testfile) testfile created like this (creditz): head -c 100m /dev/zero | openssl enc -aes-128-cbc -pass pass:”$(head -c 20 /dev/urandom | base64)” > […]
update: 2024-04: having problem connecting to camera with vlc? (rstp not well documented or not working at all? try this: easy camera stream identification with ONVIF: it is a DAMN hussle, because EVERY camera vendor does it’s own rstp://user:password:ip.ad.dr.ess:/some/url/stream and […]
proof wrong but, sorry to say but… would it not be possible that messing with bacteria DNA that by accident scientists creates new pathogens? new deadly diseases? so it’s one thing to write a program that dos “hello world” and […]
Byte The term byte was coined by Werner Buchholz in June 1956,[4][13][14][b] during the early design phase for the IBM Stretch[15][16][1][13][14][17][18] computer, http://archive.computerhistory.org/resources/text/IBM/Stretch/pdfs/Buchholz_102636426.pdf backup mirror: PLANNING A COMPUTER SYSTEM BROJECT STRETCH Buchholz Campbell_102636426.pdf which had addressing to the bit and […]
“floating point arithmetic is considered an esoteric subject by many people” (src: What Every Computer Scientist Should Know About Floating Point Arithmetic – David Goldberg 1991.pdf) some even do “transcendental calculations” (src) make no mistake: computer make mistakes too! not […]
short story: there is no “Menu” key on the t440 keyboard, (it does the same as clicking r-mouse-button, trackpad buttons can be cumbersome) hostnamectl; # tested on Operating System: Debian GNU/Linux 9 (stretch) Kernel: Linux 4.9.0-14-amd64 Architecture: x86-64 xev; # […]
if hfs+ is greyed out in gparted there is hfs+ compatibility software missing hint: sudo should be up and running, or gparted won’t be able to open a display (as root) and won’t be able to create partitions (as non […]
x11vnc is great, remmina is great (can scale the client window, no matter the vnc server resolution it will fit on the client screen) manpage remmina: remmina.man.txt when the user followed the instructions here on how to setup vnc server […]
SecurityLab, [02.11.20 11:52] The 50-year-old businessman (Hunter Biden?) in April 2019 brought his device to the IT store Mac Shop in Delaware for repair, but never returned to pick it up. The device was soon seized by the FBI. According […]
DNS servers are the “yellow pages” “phone book” of the internet. whoever is running DNS servers get’s to know all queries send (what client is requesting and probably connecting to what address… basically: what websites the user have visited, this […]
BACKGROUND INFO: how does kvm use qemu? KVM (Kernel-based Virtual Machine) is a virtualization solution for Linux on x86 hardware. It allows running multiple virtual machines (VMs) on a GNU Linux host by leveraging hardware virtualization extensions such as Intel […]
all internet connected devices need regular maintenance and security updates (especially those directly accessible to the internet (without proxy (hopefully that proxy gets regular security updates)) it is a good idea to 1) backup then 2) update, in case user […]
to recover the data: how to mount luks2 encrypted volume also check out alternative: GNU Linux – create new encrypted partition harddisk – how to open encrypted harddisk partition possibility: remove harddisk, attach to sata2usb adapter, then mount on different […]
“Apple Wireless Direct Link (AWDL) is a key protocol in Apple’s ecosystem used by over one billion iOS and macOS devices for device-to-device communications. AWDL is a proprietary extension of the IEEE 802.11 (Wi-Fi) standard and integrates with Bluetooth Low […]
Cancer is a very depressing topic. Some say, the ONLY true cure for cancer is early detection and most healthcare systems around the globe are still pretty lousy at that. the positive the negative: bigdata + AI could help early […]