Category: howto

Fatal error: Uncaught Exception: DateTimeZone::__construct(): Unknown or bad timezone (Europe/Berlin) in /var/www/html/domain.com/public_html/wp-includes/script-loader.php:414 Stack trace: #0 /var/www/html/domain.com/public_html/wp-includes/script-loader.php(414): DateTimeZone->__construct() #1 /var/www/html/domain.com/public_html/wp-includes/script-loader.php(668): what was effectively the problem: there was a corrupted broken package tzdata completely redo /etc/apt/sources.list then apt –purge remove tzdata apt […]

BEFORE ANYONE ESCALATES: ALL AI LLM EXPERIMENTS WERE CONDUCTED IN A KVM VM USING SOLAR POWER 😎☀️🙌 after a lot of trouble with airllm have the user heared of https://www.nomic.ai/gpt4all a desktop gui that makes selecting and downloading models easy […]

it is not super trivial and even AI struggles X-D here is what works: (tested on QNAP with Debian13 :D) git clone https://github.com/bkram/qnapdisplay # alternatively (backup wget http://dwaves.de/scripts/qnapdisplay.tar.gz tar fxvz qnapdisplay.tar.gz cd qnapdisplay wget https://dwaves.de/scripts/qnap_lcd.py.txt mv qnap_lcd.py.txt qnap_lcd.py python3 qnap_lcd.py […]

this howto is focused on “shell plug s” (it’s really hard to identify what exact version or “generation” a shelly is) but it should work the same for other shelly plugs. how to factory reset the shelly? before plugin hold […]

it is suprisingly straight forward (THANKS ALL INVOLVED :D) because in the end a x86 QNAP is just a computer 😀 it’s a widely known fact that QNAP is good hardware (very price stable = still pretty expensive X-D) but […]

what happened? on a system with 4GB of RAM x11vnc refused to start with error: shmget fails: No space left on device # reboot could solve that problem… are we at this point where GNU Linux just as Windows needs […]

requirements: make sure ssh public key auth works without password: pcA -> pcB, and pcB -> pcC pcB = “jumphost” # in general pcA <—-> pcB <—- pcC (x11vnc) # yes it’s kind of a weird syntax X-D ssh -L […]

WARNING! ALL THIS AI EXPERIMENTATION CAN MESS UP A SYSTEM AND SHOULD ONLY BE DONE IN A VM SANDBOX! PLEASE BE CAREFUL DESPITE THE PRIVACY PROBLEM, GIVING OPENCLAW API ACCESS TO 3rd PARTY (ChatGPT by OpenAI or claude by Anthropic) […]

yes it is advices to every 10 years print out the phone book… but without the duplicates and in font 8pt just in case cat contacts.vcf|grep -e ‘FN:’ -e ‘CELL:’|less cat contacts.vcf|grep -e ‘FN:’ -e ‘CELL:’ > contacts.print1.vcf paste – […]

it happend once before and it is very annoying: why is this or that command not stored in history? echo $HISTCONTROL ignoreboth # ignoreboth means: ## ignorespace Any command whose first character is a space is not saved to the […]

apt search pdfunite poppler-utils/stable,stable,now 25.03.0-5 amd64 [installed,automatic] PDF utilities (based on Poppler) # tested on hostnamectl Operating System: Debian GNU/Linux 13 (trixie) Kernel: Linux 6.12.48+deb13-amd64 Architecture: x86-64 # worked nicely pdfunite file1.pdf file2.pdf file3.pdf output.pdf # untested gs -dBATCH -dNOPAUSE […]

mail is a ancient biest in need for massive rust based rewrite, but a lot of users rely on it for a lot of tasks (smtp 25,465,587,2525) (imap 143,993) alias ssh_tunnel_mail_socks5=”ssh -v -N -D 127.0.0.1:1080 username@ip.of.users.ssh.server” then configure thunderbird to […]

copy and paste this into the network config via virt-manager to limit download speeds for this vm to 1024KByte/s: <bandwidth> <inbound average=’1024′ peak=’1024′ burst=’2048’/> <outbound average=’1024′ peak=’2048’/> </bandwidth>

should be simple but canonical has changed the settings and there are outdated howtos out there confusing users hostnamectl; # tested on Static hostname: ubuntu24 Icon name: computer-vm Virtualization: kvm Operating System: Ubuntu 24.04.3 LTS Kernel: Linux 6.8.0-71-generic Architecture: x86-64 […]

the web in 2025 and especially sites like youtube and stackoverflow too much advertisement too much cookie banners (sharing info with zig billion companies? holy crap) how to fix this? browser to https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/ and install the addon # insert this […]

in 2025 still a lot of browsers are not x265 compatible (firefox 1.141 is) the best up to know: (it reduces the video size resolution by 50% and reencode audio to mp3, because firefox seems to have problems with ogg […]

software minimalism (leaving away anything that is not absolutely necessary and trying to simplify things) is a good UNIX KISS software concept that will lead to more stable and more secure systems, because there are just an infinite amount of […]

seriously rather would recommend using rsync to backup periodically to USB-DISK-A then every week swap USB-DISK-A with  USB-DISK-B and backup to USB-DISK-B check out this cool SATA swap station than this madness: GNU Linux veeam CAN NOT restore backup.vbk of […]

hostnamectl; # tested on Static hostname: workstation Operating System: Debian GNU/Linux 13 (trixie) Kernel: Linux 6.12.30-amd64 Architecture: x86-64 # theoretical lowest possible value 0 (highest priority) and highest possible value 4294967295 (hex 0xffffffff, guint32 (unsigned 32-bit integer, lowest priority) for […]

brasero is actually a nice CD-R DVD-R burning based on wodim (formely known as cdrecord, now cdrecord is only a softlink to wodim) but it has some pitfalls problems on Debian 13: Schilling claims, “is the only CD-R program available […]

got to know: Desktops that use wayland will profit from high framerate (x11 based not) make sure the NVIDIA card uses it’s own monitor output, if it’s outputting only on virt-manager virtio device: ./NVIDIA.run reinstall drivers in single-user-mode (init 2) […]

ffmpeg -i input.mp4 -c:v copy -c:a aac output.mp4

in 2025-07 DEBIAN 13 IS STILL “TESTING” (BETA)! USER HAS BEEN WARNED! 😀 (written on Debian 13) if the user get’s random strange errors during setup someone keeps fucking up the debian installer 🙁 (folder, iso) so can not recommend […]

convenience vs security: it’s always a tradeoff credit card scammers and scimmers: when the shop owner HIMSELF is the thief if not already put all cards with “wireless” functionality (bank ec credit id healthcare cards maybe even drivers licence) into […]

in theory GNU Linux support is (mostly) pretty well done by brother’s setup.sh script the user can get from here: the script: wget https://download.brother.com/welcome/dlf006893/linux-brprinter-installer-2.2.4-1.gz # be root su – root # unpack gunzip linux-brprinter-installer-2.2.4-1 # then chmod +x linux-brprinter-installer-2.2.4-1 then […]

apt update apt install mate-desktop-environment-core apt install lightdm reboot PS: for some strange reason this does not work with ubunt 2404, it throws a lot of errors after startup and the top left menu is missing

it’s strange… remmina per default does not allow vnc connection unless: neofetch; # tested on root@rockpi-e ————- █ █ █ █ █ █ █ █ █ █ █ OS: Armbian (24.11.1) aarch64 ███████████████████████ Host: Radxa ROCK Pi E ▄▄██ ██▄▄ […]

So unglaubglich das klingt, kaum eine Programmiersprache hat sich so ausdauernd gehalten wie die Sprache C aus dem Jahr 1972. Ein grossteil des Erfolges von C ist sicherlich das “keep it simple” Prinzip, umso “einfacher” eine Sprache umso einfacher lässt […]

DELL S2722QC is an excellent monitor [+] 4k resolution [+] charge laptop via USB-C [-] unfortunately exactly this USB-C charging causes in combination with “ThinkPad T14 Gen 3” a buzzing sound on the audio out jack (miniklinke headphones kopfhörer) howto […]