sepastian

Environment

$ uname -a
Linux x220 6.3.0-1-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.3.7-1 (2023-06-12) x86_64 GNU/Linux

List Cameras

sepastian

#!/bin/bash

set -euo pipefail

# Find files created within 1 days (`-ctime -1`);
# convert (Nikon/NEF) RAW images to PPM using dcraw;
# write results to stdout with -c;
# convert stdin to JPG using Imagemagick's convert;
# specify format of input image with 'ppm:-'.
find /path/to/sdcard/ -name '*.NEF' -ctime -1 \

sepastian

From: https://cromwell-intl.com/open-source/performance-tuning/file-systems.html.

Mount Parameters

Disable recording of access times when mounting the FS.

For example, find with access times enabled would upate the access time of every file found.

# /etc/fstab

sepastian

# Oh-My-ZSH custom function to record left monitor from CLI.
# 
# Place in $ZSH/.oh-my-zsh/custom.
#
# Two monitors at screen 0, the left one connected at DP-1:
#
#     xrandr 
#     Screen 0: minimum 320 x 200, current 3840 x 1200, maximum 16384 x 16384
#     DP-1 connected primary 1920x1200+1920+0 (normal left inverted right x axis y axis) 518mm x 324mm
#       1920x1200     59.95*+

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# Place in $ZSH/.oh-my-zsh/custom.
#
# The following ZSH function uses GhostScript's `gs` command to reduce the file size of a PDF file.
# The result of compressing `test.pdf` will be written to `test.compressed.pdf`.
# If `test.compressed.pdf` exists, it will only be overwritten after confirmation.
#
# Now, restart/open a new shell and compress PDFs with:
#
#     compress_pdf test.pdf
#     File exists: test.compressed.pdf, overwrite (Y/n)? 

sepastian

# Based on https://apple.stackexchange.com/a/389067/453491

# In order to calculate DPI, determine units and resolution first.
identify -verbose warc2corpus@2x_300dpi.png | grep -E -i "resolution|units"  
#  Resolution: 118.11x118.11
#  Units: PixelsPerCentimeter
#    png:pHYs: x_res=11811, y_res=11811, units=1

# 1 PixelsPerCentimeter corresponds to 2.54 DPI.
# Calculate DPI using the following command.

sepastian

class Heap
  def initialize(*elems)
    @h= heapify(elems)
  end
  def inspect
    return '(empty)' if @h.empty?
    @h
      .group_by.with_index{ Math.log2(_2+1).to_i }
      .map{ |l,vs| vs.join(' ') }
      .join("\n")

sepastian

#!/bin/bash

# Options to -draw are not well documented;
# see: https://www.imagemagick.org/Usage/fonts/

set -euo pipefail
IFS=$'\n\t'

indir="/media/sebastian/3161-3938/DCIM"

sepastian

# For each page in input.pdf, 
# generate image(s) in PNG format
# named output_<PAGE>.png
# where PAGE is a 4-digit zero-padded number.
pdfinfo input.pdf \
  | grep Pages \
  | awk -F'[: ]*' '{print $2}' \
  | xargs seq \
  | parallel \
    '\

sepastian

1. Download and install the official PPD files

See https://www.konicaminolta.de/de-de/support/download-center

Latest version at time of writting is `BH554ePPDLinux_300000000MU.zip`

2. Find out printer's IP address

On the printer, press