play -n synth 50 triangle 220 triangle 222 triangle 262 triangle 264 triangle 330 triangle 332 tremolo 0.1 0.4 vol 0.6


&


play -n synth 50 sine 50 sine 52 vol 0.7

&
amplify using default OS volume meter

this can call OOM on average desktop system in 2025:

printf '%s' {1..66666666}

(zsh not leaking use bash)

cool fallout backgrounds:

wget https://w.wallhaven.cc/full/{g8/wallhaven-g8kdke.png,lm/wallhaven-lmodop.png,ym/wallhaven-yml9ll.png,j5/wallhaven-j5jdjp.png}

archlinux yay hook using "--editor":

~ $ cat ~/.local/bin/yay-pkgbuild-editor.sh
#!/bin/bash
# AMD moment
PKGBUILD_PATH="$1"
PKGBUILD_DIR=$(dirname "$PKGBUILD_PATH")

sed -i \
  -e 's/: "${_per_gov:=no}"/: "${_per_gov:=yes}"/' \
  -e 's/: "${_tcp_bbr3:=no}"/: "${_tcp_bbr3:=yes}"/' \
  -e 's/: "${_processor_opt:=}"/: "${_processor_opt:=native}"/' \
  -e 's|"\${_patchsource}/all/0001-cachyos-base-all.patch")|"\${_patchsource}/all/0001-cachyos-base-all.patch"\n    "0001-XXX-Restore-old-vblankoff-behavior-for-dgpu.patch")|' \
  "$PKGBUILD_PATH"

cp ~/Downloads/0001-XXX-Restore-old-vblankoff-behavior-for-dgpu.patch "$PKGBUILD_DIR/"
cd "$PKGBUILD_DIR" && updpkgsums

exec subl "$PKGBUILD_PATH"
~ $ yay --editor ~/.local/bin/yay-pkgbuild-editor.sh --editmenu --answeredit A --answerclean A --answerdiff N --mflags --skipinteg linux-cachyos

UPD1:

Separate PKGBUILD noscript with all that extra crap I dont even need:

#!/bin/bash
set -e
# always build in yay dir
mkdir -p ~/.cache/yay/ && cd ~/.cache/yay/

# 1. Download the PKGBUILD (without calculating deps yet)
echo ":: [1/4] Downloading linux-cachyos..."
# cleaning

yay -Sccc --noconfirm
yay -G linux-cachyos  # Download only
cd linux-cachyos

# 2. Apply  Patches
echo ":: [2/4] Patching PKGBUILD (Removing Rust)..."

# Aggressive RUST dependency removal (Handles quotes, spaces, tabs)
sed -i -E '/^[[:space:]]*["'\'']?rust(-bindgen|-src)?([>=<].*)?["'\'']?([[:space:]]*#.*)?$/d' PKGBUILD

# Apply Kernel Options & Configs & rust purge
# breaking kexec
# and some obscure stuff
sed -i \
  -e 's/: "${_per_gov:=no}"/: "${_per_gov:=yes}"/' \
  -e 's/: "${_tcp_bbr3:=no}"/: "${_tcp_bbr3:=yes}"/' \
  -e 's/: "${_processor_opt:=}"/: "${_processor_opt:=native}"/' \
  -e 's/: "${_makenconfig:=yes}"/: "${_makenconfig:=no}"/' \
  -e 's|"\${_patchsource}/all/0001-cachyos-base-all.patch")|"\${_patchsource}/all/0001-cachyos-base-all.patch"\n    "0001-XXX-Restore-old-vblankoff-behavior-for-dgpu.patch")|' \
  -e '/^prepare() {/a\    export RUSTC=no\n    export BINDGEN=no\n    export HOSTRUSTC=no' \
  -e '/### Rewrite configuration/i\    # Force disable Rust and dependencies\n    noscripts/config -d RUST -d SAMPLES_RUST -d DRM_PANIC_SCREEN_QR_CODE' \
  -e '/### Rewrite configuration/i\    # Disable kexec\n    noscripts/config -d KEXEC -d KEXEC_FILE -d KEXEC_SIG -d KEXEC_CORE -d CRASH_DUMP -d KEXEC_HANDOVER' \
  -e '/### Rewrite configuration/i\    # Server / Enterprise\n    noscripts/config -d LIVEPATCH -d INFINIBAND -d ISCSI_TCP' \
  -e '/### Rewrite configuration/i\    # Unused network protocols\n    noscripts/config -d AF_RXRPC -d TIPC -d ATM -d DECNET -d NFC -d HAMRADIO -d X25 -d LAPB' \
  -e '/### Rewrite configuration/i\    # Unused filesystems\n    noscripts/config -d OCFS2_FS -d GFS2_FS -d CEPH_FS -d AFS_FS -d CODA_FS -d 9P_FS -d JFS_FS -d REISERFS_FS -d NILFS2_FS -d MINIX_FS' \
  -e '/### Rewrite configuration/i\    # Debugging\n    noscripts/config -d SCHED_DEBUG' \
  -e '/### Rewrite configuration/i\    # Unused hardware\n    noscripts/config -d PCCARD -d FIREWIRE -d GNSS -d COMEDI -d GREYBUS' \
  -e '/# Install .rmeta files/,/fi/d' \
  -e '/# Install .so files/,/fi/d' \
  -e 's/^pkgbase="linux-\$_pkgsuffix"/_pkgsuffix=cirnos\npkgbase="linux-\$_pkgsuffix"/' \
  -e 's/^pkgdesc=.*/pkgdesc="Custom Kernel Build (Rust Free)"/' \
  -e 's/^export KBUILD_BUILD_HOST=cachyos/export KBUILD_BUILD_HOST=build-pc/' \
  -e 's/^# Maintainer: Peter Jung.*/# Maintainer: Name <me@example.com>/' \
  PKGBUILD

# 3. Add  custom patch
echo ":: [3/4] Adding custom patch..."
cp ~/Downloads/0001-XXX-Restore-old-vblankoff-behavior-for-dgpu.patch .

# 4. Build and Install
# This runs makepkg on the LOCALLY modified file.
# Since we patched it BEFORE this step, it will NOT ask for Rust.
echo ":: [4/4] Building and Installing..."
updpkgsums
makepkg -si

listing system wide standards configuration variables:

getconf -a

ffmpeg, vibrant glitch with audio shift:

ffmpeg -stream_loop -1 -i "1.mp4" -stream_loop -1 -i "2.ogg" -filter_complex "[0:v]trim=duration=12,setpts=PTS-STARTPTS, \
 hue=H='2*PI*t*3':s=3:enable='gte(t,5)', \
 negate=enable='gte(t,5)'[v]; \
 [1:a]atrim=start=9:duration=12,asetpts=PTS-STARTPTS,volume=2.8,bass=g=12:f=100[a]" -map "[v]" -map "[a]" -c:v libx264 -c:a aac -t 12 "vibrant_glitch.mp4"

ffmpeg glow effect glitch:

ffmpeg -stream_loop -1 -i "1.mp4" -stream_loop -1 -i "2.ogg" -filter_complex "[0:v]trim=duration=12,setpts=PTS-STARTPTS,split=2[base][glitch]; \
 [glitch]gblur=sigma=20:enable='gte(t,5)', \
         hue=H='2*PI*t*2':s=2:enable='gte(t,5)'[glitcheffect]; \
 [base][glitcheffect]blend=all_mode=screen:all_opacity=0.7:enable='gte(t,5)'[v]; \
 [1:a]atrim=start=9:duration=12,asetpts=PTS-STARTPTS,volume=2.7,bass=g=12:f=100[a]" -map "[v]" -map "[a]" -c:v libx264 -c:a aac -t 12 "happy_glitch_original_audio.mp4"

freaked interfaces №47

seems modern UWP/XAML notepad adding garbage to the buffer

List progs startup times:

ps -eo pid,lstart,cmd

discover all domains/subdomains a company uses by cert & form proper list:

curl -s "https://crt.sh/?q=google.com&output=json" | jq -r '.[] | .common_name, .name_value' | sed 's/^\*\.//' | sort -u | grep -E '^[a-zA-Z0-9.-]+$'

Useful for generating DNS PBR lists for sites.

Run clean temp chromium in docker native under X11:

docker run --rm -it --name "chromium-$(date +%s)" --security-opt apparmor:unconfined --cap-add=SYS_ADMIN --net host --device /dev/input --device /dev/snd --device /dev/dri -v "$HOME/Downloads:/downloads" -v "/tmp/chromium-docker:/data" -e PUID="$(id -u)" -e PGID="$(id -g)" -e DISPLAY="$DISPLAY" -e XAUTHORITY="${XAUTHORITY:-$HOME/.Xauthority}" -v "${XAUTHORITY:-$HOME/.Xauthority}:${XAUTHORITY:-$HOME/.Xauthority}:ro" -v /tmp/.X11-unix:/tmp/.X11-unix:ro -v /dev/shm:/dev/shm -v "$HOME/.config/pulse:/home/ubuntu/.config/pulse:ro" -v /etc/machine-id:/etc/machine-id:ro -v "${XDG_RUNTIME_DIR:-/run/user/$(id -u)}/pulse:${XDG_RUNTIME_DIR:-/run/user/$(id -u)}/pulse:ro" -v "${XDG_RUNTIME_DIR:-/run/user/$(id -u)}/bus:${XDG_RUNTIME_DIR:-/run/user/$(id -u)}/bus:ro" -v /var/lib/dbus/machine-id:/var/lib/dbus/machine-id:ro -v /run/dbus:/run/dbus:ro -v /run/udev/data:/run/udev/data:ro -v /etc/localtime:/etc/localtime:ro andrewmackrodt/chromium-x11

there FF dckr laying around

sniff DNS queries on localhost:

tshark -i lo -T fields -e dns.qry.name

Sys progs debugging Tips & Tricks:

strace is very handy dynamic analysis tool, but extremely verbose.
There how you can tame strace filtering using trace= param:

For example, if you have a program like:

#include <stdlib.h>

int main() {  system( " ls /usr " ); };

which executing some programs inside and you're curious about what it's actually trying to do with which argument?

cc this example and try this:

cc 1.c 

strace -f -e trace=execve,execveat,fork,vfork,clone,clone3,exit_group ./a.out

Output will be like so:

...
[pid 27862] execve("/bin/sh", ["sh", "-c", "--", " ls /usr "], 0x7ffd668ba8e8 /* 64 vars */) = 0
...
[pid 26344] execve("/usr/bin/ls", ["ls", "/usr"], 0x55edbcf792b0 /* 64 vars */) = 0
...

telling us that the "./a.out" prog actually made 2 execve calls, the "/usr/bin/ls" program with "/usr" as its argument was running using shell "/bin/sh".



-- Be careful when making inferences about the user/kernel boundary if only a subset of system calls are being monitored. The default is trace=all. strace(1) man.


----
Also, there multiple ways to search|list syscalls:

0.

grep exec /usr/include/sys/syscall.h /usr/include/bits/syscall.h /usr/include/asm/unistd*.h

1.

echo '#include <sys/syscall.h>' | cpp -dM | grep exec

2.

ausyscall --dump | grep exec

----

bash users can check current time in UTC+00:00 using:

cat < /dev/tcp/time.nist.gov/13

just in case

upd about https://news.1rj.ru/str/tuneToday

Just made this channel live at:

https://tunetoday.duckdns.org:10000

Same songs available there in shuffle mode 24\7.

SSL certificates may be broken; sorry for this.
Have no much time to maintain it properly.
Thx for understanding.

Top 10 funniest linux moments
№10: no space

ps way to view memory used by process:

ps --ppid 2 -N k-rss -o rss,comm

Output in MiB:

ps --ppid 2 -N k-rss -o rss=,comm=|while read r c; do printf "%dM %s\n" "$((r>>10))" "$c"; done

Colors !!!

ps --ppid 2 -N k-rss -o rss=,comm=|while read r c; do printf "\e[32m%4dM\e[0m %s\n" "$((r>>10))" "$c"; done