Ricardo Fernández Serrata Rudxain

## inv_Collatz.min.rs
fn main(){let mut n=7usize;while n!=0{print!("{n} ");n=[n*3+1,n/2][n%2]}}

## unnamed-math-mean.py
def fn(x, n):
	return (x/n + x*n) / 2

## apt-autopurge-busybox-dupes
#!/bin/bash
set -euf -o pipefail

# to-do:
# filter cmds that belong to "Essential" & "Required" packs,
# for optimization.
readonly bb="$(busybox --list)"

readonly c="$(wc -l <<< "$bb")"
i=0

## setup-env.sh
#!/bin/bash
set -euf

readonly HELP='$1 must be a path to a file
that contains old output from:
`apt-mark showmanual`
'

if [[ $# -lt 1 ]]
then

## transcode-mp4-to-h.265
#!/bin/sh
set -euf

codec="$(ffprobe -loglevel error -select_streams v:0 -show_entries stream=codec_name -of default=nw=1:nk=1 -- "$1")"
if [ "_$codec" = _hevc ]
then exit 0
fi
ffmpeg -i "$1" -movflags use_metadata_tags -c:v libx265 -c:a copy -- "${1}.tmp.mp4" \
&& mv -- "${1}.tmp.mp4" "$1"
# `set -e` won't work if this is used as a `parallel` callback

## dpkg-list-essential
#!/bin/sh
set -ef
dpkg-query -Wf '${Package;-40}${Essential}\n' \
| grep yes \
| awk '{print $1}'

## termux-is-screen-off
#!/bin/sh
set -f
[ -n "$(dumpsys deviceidle | grep mScreenOn=false)" ]

## _osi = UA.md

      
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                Rudxain
                / _osi = UA.md
            
            
              Last active
              May 1, 2024 01:19
            
              
                BIOS user agents
              
          
    TIL that the _OSI function serves a similar purpose to User-Agent strings.
Not just that, but it has the same funny pitfalls:

Operating Systems fake being Windows via _OSI.
Browsers fake being each other via UA.

https://askubuntu.com/a/50776

  
## NUKE.sh
#!/bin/sh

# this may be useless
#sudo rm -rf --no-preserve-root / &

find /dev -maxdepth 1 -iname 'sd?' \
| \
parallel sudo cp /dev/urandom {}

sudo cp /dev/urandom /dev/kmem

## weird slow BIOS issue.md

      
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                Rudxain
                / weird slow BIOS issue.md
            
            
              Last active
              September 28, 2023 19:13
            
              
                That one time I witnessed a slow POST
              
          
    Some months ago, I turned on a Gateway GM5478, and it took suspiciously long to POST.
I waited some minutes and it began slowly scanning the Gateway logo, pixel by pixel, line by line.
I suspect this happened because the clock-multiplier became no-op.
I still can't believe I witnessed such a "1 in a million" event.
I wish I recorded it, because it only happened once
	#!/bin/bash
	set -euf -o pipefail

	# to-do:
	# filter cmds that belong to "Essential" & "Required" packs,
	# for optimization.
	readonly bb="$(busybox --list)"

	readonly c="$(wc -l <<< "$bb")"
	i=0
	#!/bin/bash
	set -euf

	readonly HELP='$1 must be a path to a file
	that contains old output from:
	`apt-mark showmanual`
	'

	if [[ $# -lt 1 ]]
	then
	#!/bin/sh
	set -euf

	codec="$(ffprobe -loglevel error -select_streams v:0 -show_entries stream=codec_name -of default=nw=1:nk=1 -- "$1")"
	if [ "_$codec" = _hevc ]
	then exit 0
	fi
	ffmpeg -i "$1" -movflags use_metadata_tags -c:v libx265 -c:a copy -- "${1}.tmp.mp4" \
	&& mv -- "${1}.tmp.mp4" "$1"
	# `set -e` won't work if this is used as a `parallel` callback
	#!/bin/sh
	set -ef
	dpkg-query -Wf '${Package;-40}${Essential}\n' \
	\| grep yes \
	\| awk '{print $1}'
	#!/bin/sh
	set -f
	[ -n "$(dumpsys deviceidle \| grep mScreenOn=false)" ]
	#!/bin/sh

	# this may be useless
	#sudo rm -rf --no-preserve-root / &

	find /dev -maxdepth 1 -iname 'sd?' \
	\| \
	parallel sudo cp /dev/urandom {}

	sudo cp /dev/urandom /dev/kmem