about
  me

algo
  chibihash64 hash
  crc16 modbus
  exponential blur
  fnv1a hash
  kelvin to rgb
  prime integer check
  totp sha1

cmds
  apprentice gdb operator guide
  bash native network socket
  common irc commands
  convert bases using bc
  count source lines of code
  create allocate large big file
  diff compare directories
  dirty python web server
  display pressed keys
  get network manager wifi password
  install root on encrypted zfs
  list fonts
  octave forge install package
  osc escape sequence testing
  permit doas to user
  read midi events
  resolve host name via dns lookup
  rsync remote directory to local directory
  sed extract every nth character from line
  send files to android device
  swap capslock with escape in console
  valgrind kcachegrind callgrind

cooking
  cherry pie
  chicken cutlets
  fast pizza
  greek meat pie
  salat valin
  shchi
  standard stew
  teftels

curl
  disable ssl verification via config
  get current geolocation
  get weather
  track server redirect chain

devices
  keyboards
  laptops
  logitech extreme 3d pro
  mouses

ffmpeg
  attach subtitles track to video file
  convert audio file to wav format
  crop video
  cut audio
  negate video
  record screen display
  reverse audio file contents
  speed up video

gitlab
  unprotect branch

git
  clone only last commit
  delete untracked files
  disable ssl verification via config
  git add stage only part of file patch
  push current repo contents to mirror
  push only one commit
  save changes as patch
  uncommit last commit

image-manipulation
  gif crop in gifsicle
  gif optimize in gifsicle
  gimp increase contrast
  magick flip
  magick join horizontally vertically
  svg rasterize in inkscape

latex
  aliases
  dual section name
  font sizes
  indent first paragraph
  insert table of contents
  page numbering
  plotting
  russian language
  show frame
  stress
  system of equations

linux
  block icmp traffic using bpf
  change default network ttl
  generate random uuid
  stack trace of threads in running process
  wireguard setup
  write to serial port

mpv
  multiple subtitles
  play remote files through mpv over ssh

nmap
  check port

notes
  nvchad guide

openbsd
  configure openbsd acme client
  pf redirect http and https to local
  search for package in ports collection
  send email on ssh connection

pacman
  remove packages from the cache

pdf
  extract page range from pdf file
  merge pdf files

programming
  fast integer log2
  run every second or on demand
  run once thread safe and lock free

sox
  ambient ventilation noise

sqlite
  recreate table

ssh
  dynamic port forwarding via socks server

sway
  list windows

virtualbox
  install guest additions

windows
  activation commands
  create bootable windows installer
  set keyboard repeat delay and rate

xorg
  disable input device
  enable xorg touchpad tapping and dwt
  keyboard en ru layout and swap esc caps
  x documents reference

yt-dlp
  configure permanent proxy setting
  download all videos from user channel

Download (replace `7.0.10` with your version of VirtualBox):

https://download.virtualbox.org/virtualbox/7.0.10/VBoxGuestAdditions_7.0.10.iso

Mount this file as storage:

mount -o loop VBoxGuestAdditions_7.0.10.iso /mnt

Install.