💾 Archived View for metasyn.pw › spellbook.gmi captured on 2023-11-04 at 11:24:02. Gemini links have been rewritten to link to archived content
⬅️ Previous capture (2023-09-28)
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Notes for things I find myself searching for over and over. I know they're
faster to find here than somewhere else.
- convert a bunch of stils into a webm file
ffmpeg -framerate 30 -i name%4d.webp -c:v libvpx-vp9 -pix_fmt yuva420p -lossless 1 out.webm
- reverse
ffmpeg -i input.webm -vf reverse reverse.webm
- stitch two files together
> cat input.txt file 'one.webm' file 'two.webm' ffmpeg -f concat -i input.txt -c copy output.webm
- see [tkacz.pro] also
- rotate
convert INPUT_FILE -rotate "+90" OUTPUT_FILE
- resize
convert INPUT_FILE -resize 70% OUTPUT_FILE convert INPUT_FILE -resize 640x480 OUTPUT_FILE
use `mogrify` for processing multiple files at once generally
- invert colors
convert INPUT -channel RGB -negate OUTPUT
- make transparent
convert INPUT -transparent white OUTPUT
profiling:
:profile start profile.log :profile func * :profile file * " At this point do slow actions :profile pause :noautocmd qall!
first, choose a compose key in your os keyboard settings.
- For ë you press Compose+", e.
- For ẽ you press Compose+~, e.
- For ô you press Compose+^, o.
- For á you press Compose+', a.
- For à you press Compose+`, a.
- For € you press Compose+=, e.
- For £ you press Compose+-, l.
sudo apt update sudo apt upgrade sudo apt dist-upgrade sudo apt autoremove sudo do-release-upgrade sudo reboot now
sometimes after that there are some random dpkg / apt errors:
sudo dpkg --configure -a sudo apt --fix-broken install
- example file in `/usr/share/applications/wally.desktop`
[Desktop Entry] Type=Application Name=Wally Comment=USB Flasher for Ergodox EZ Version=3.0.23 Exec=/usr/local/bin/wally Icon=/opt/wally/appicon.png Terminal=False Categories=Firmware
sudo apt-get clean sudo apt-get autoremove --purge
These are some notes for myself when setting up arch.
before you can use the package manager `pacman` you need to run:
pacman-key --init
This sets up your ability to set some keys and then use them to check the fingerprints on packages you're going to install.
If you're on a raspberry pi, you'll need to add the keys for `archlinuxarm` in particular:
pacman-key --populate archlinuxarm
Thereafter you can go about installing whatever you need.
If you need to remove all the keys you have added to start over, you can:
rm -rf /etc/pacman.d/gnupg
before running the init again.
In order to get make, and a bunch of basic tooling:
pacman -S base-devel
I always need to download some AUR packages. Usually we still need to download a client:
git clone https://aur.archlinux.org/yay.git cd yay makepkg -si
Sometimes my system76 laptop's audio just stops working. This seems to fix it:
systemctl --user restart pulseaudio rm -r ~/.config/pulse pulseaudio -k
I can _never_ remember this:
- `Ctrl + Shift + E + Space`: then search via word tags
df -h du -h -d 1 . --exclude proc
journal logs
journalctl --rotate journalctl --vacuum-size=100M journalctl --vacuum-time=10d
docker
docker system prune -a docker volume prune -a
snap
snap set system refresh.retain=2
sometimes you run out of memory on tiny machines. don't forget to use swap!
sudo fallocate -l 1G /swapfile sudo chmod 600 /swapfile sudo mkswap /swapfile sudo swapon /swapfile sudo swapon --show sudo cp /etc/fstab /etc/fstab.bak echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab cat /proc/sys/vm/swappiness sudo sysctl vm.swappiness=10
- install doas with your package manager
- modify `/etc/doas.conf` as root
- example contents for user `lemongrab` and group `candy`
permit persist lemongrab as root permit nopass lemongrab as root cmd apt permit nopass lemongrab as root cmd apt-get permit persist :candy as root
then just use doas instead of sudo
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