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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.


ffmpeg -framerate 30 -i name%4d.webp -c:v libvpx-vp9 -pix_fmt yuva420p -lossless 1 out.webm
ffmpeg -i input.webm -vf reverse reverse.webm
> cat input.txt
file 'one.webm'
file 'two.webm'

ffmpeg -f concat -i input.txt -c copy output.webm


convert INPUT_FILE -rotate "+90" OUTPUT_FILE
convert INPUT_FILE -resize 70% OUTPUT_FILE
convert INPUT_FILE -resize 640x480 OUTPUT_FILE

use mogrify for processing multiple files at once generally

convert INPUT -channel RGB -negate OUTPUT
convert INPUT -transparent white OUTPUT



:profile start profile.log
:profile func *
:profile file *
" At this point do slow actions
:profile pause
:noautocmd qall!

linux special characters

first, choose a compose key in your os keyboard settings.


dist upgrade

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

add desktop launcher (popos)

[Desktop Entry]
Comment=USB Flasher for Ergodox EZ

clean up

sudo apt-get clean
sudo apt-get autoremove --purge

arch linux

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.

base packages

In order to get make, and a bunch of basic tooling:

pacman -S base-devel

AUR client

I always need to download some AUR packages. Usually we still need to download a client:

git clone
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

inserting emojis

I can never remember this:

disk space

df -h
du -h -d 1 . --exclude proc

journal logs

journalctl --rotate
journalctl --vacuum-size=100M
journalctl --vacuum-time=10d


docker system prune -a
docker volume prune -a


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


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


a tool for looking at ram slots without opening your computer.

see how many slots you have on your hardware, maximum ram

sudo dmidecode -t 16

see whats in them

sudo dmidecode -t 17

proxmox setup

deb bookworm pve-no-subscription o


apt-get install avahi-daemon
cp /usr/share/doc/avahi/daemon/examples/ssh/service /etc/avahi/service
systemctl service start avahi-daemon.service

cloud init

qemu-img resize jammy-server-cloudimg-amd64.img +2G

#  <a name='create-new-vm'>Create new vm</a>
qm create 8000 --memory 2048 --core 2 --name ubuntu-cloud --net0 virtio,bridge=vmbr0

#  <a name='import-the-the-image'>Import the the image</a>
qm importdisk 8000 jammy-server-cloudimg-amd64.img local-lvm

# Create a fake disk, attach to the cloud init, set boot, enable serial/vga for vnc terminal
qm set 8000 --scsihw virtio-scsi-pci --scsi0 local-lvm:vm-8000-disk-0
qm set 8000 --ide2 local-lvm:cloudinit
qm set 8000 --boot c --bootdisk scsi0
qm set 8000 --serial0 socket --vga serial0

#  <a name='save-as-template'>Save as template</a>
qm template 8000

#  <a name='now-setup-cloud-init-things-like-username-ssh-dhcp-versus-static'>now setup cloud init things like username, ssh, dhcp versus static</a>

#  <a name='deploy-as-nodes'>Deploy as nodes</a>
qm clone 8000 135 --name kropotkin --full
qm clone 8000 136 --name bakunin --full
qm clone 8000 137 --name graeber --full

#  <a name='start-them-all'>start them all</a>
for i in 135 136 137; do qm start $i; done

#  <a name='destroy-them-all'>destroy them all</a>
for i in 135 136 137; do qm stop $i <img src='resources/img/'/> qm destroy $i; done

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