visualblind

#!/usr/bin/env bash

BIN_DF=$(which "df")
if ! [ -x "$BIN_DF" ]; then
  echo "df (coreutils package) not installed."
  echo "See the official documentation for more information"
  exit 1
fi

case "$1" in

visualblind

404 error page

404 error SVG animation page
anime.js

error 404

A Pen by Swarup Kumar Kuila on CodePen.

License.

visualblind

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

visualblind

#!/usr/bin/env bash

set -Eeuo pipefail
trap cleanup SIGINT SIGTERM ERR EXIT

script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

usage() {
  cat <<EOF
Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

visualblind

kern.maxproc: Maximum number of processes
kern.ngroups: Maximum number of supplemental groups a user can belong to
kern.ipc.shm_allow_removed: Enable/Disable attachment to attached segments marked for removal
kern.ipc.shm_use_phys: Enable/Disable locking of shared memory pages in core
kern.ipc.shmall: Maximum number of pages available for shared memory
kern.ipc.shmseg: Number of segments per process
kern.ipc.shmmni: Number of shared memory identifiers
kern.ipc.shmmin: Minimum shared memory segment size
kern.ipc.shmmax: Maximum shared memory segment size
kern.ipc.semaem: Adjust on exit max value

visualblind

ZFS

zpool status -v #shows zpool status infos

zpool iostat 1 #shows IOps and R/W bandwidth every second

zfs list -t snapshot #lists all the snapshots, add | grep "" to filter

arc_summary.py #shows ARC stats

visualblind

#!/usr/bin/env bash
inotifywait -m /mnt/pool0/p0ds0smb/temp/ffmpeg-inotify/. -e close_write -e moved_to |
  while read dir action file; do
    if [[ "$file" =~ ^.*\.(mp4|mkv)$ ]]; then
      bash -c "/mnt/pool0/p0ds0smb/visualblind/Documents/Scripts/linux/ffmpeg_tcode_compat.sh -d /mnt/pool0/p0ds0smb/temp/ffmpeg-inotify -w /mnt/pool0/p0ds0smb/temp/ffmpeg-inotify/.working | /usr/bin/logger -t 'ffmpeg-inotify-transcode-acodec.sh'";
    fi;

visualblind

#!/usr/bin/env bash
openssl enc -aes-128-ctr -pass file:/dev/random 2>/dev/null | tail -c+17

visualblind

#!/usr/bin/env bash
find . -depth -maxdepth 2 -regextype posix-extended -regex '.*\.mkv$|.*\.mp4$' -type f -exec bash -c 'echo "{}" $(ffprobe -loglevel error -select_streams a:0 -show_entries stream=codec_name -of default=nw=1:nk=1 "{}")' \;

# stdout media files not using the AAC codec:
find . -mount -depth -maxdepth 2 -regextype posix-extended -regex '.*mkv$|.*mp4$' -type f -exec bash -c \
'echo "{}" $(ffprobe -loglevel error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 "{}")' 2>/dev/null \; \
| grep -v 'aac$'

visualblind

#!/usr/bin/env bash
#
## DESCRIPTION: Transcode with FFmpeg all (mkv, mp4) media files in specified directory,
##              overwriting the original source files.
##
## AUTHOR:  Travis Runyard
## Revised: 04/18/2020
## URL:     https://sysinfo.io/ffmpeg-batch-transcode-audio/

# Exit on first non-zero exit code