cmd_notes

My notes about GNU/Linux CLI, especially automating things that most people think are not automatable.

• Running xterm with standard (80x24) term size (important when recording term) and favorite Terminus font.

  xterm -fn "-*-terminus-*-*-*-*-*-180-*-*-*-*-*-*" -geometry 80x24

• Composing multiple PDF docs into one

  pdftk A=bigpdf.pdf B=insert.pdf cat A1-180 B A181-end output output.pdf

  Also PDFsam is useful for splitting and merging.

• Batch resizing all pictures in a directory with additional sharpening, annotating of the date a picture was taken (info from EXIF). Original pictures are untouched, the results are stored (here) in a subdirectory small.

  One liner:

  for F in *jpg; do convert $F -resize 1000x1000 -sharpen 1.2 -gravity South -background YellowGreen -splice 0x18 -annotate +0+2 "$(identify -verbose $F | grep exif | grep Original | tr -s ' ' | cut -d ' ' -f3 | tr ':' ' ' | awk '{print $3 "." $2 "." $1}')" small/$F; done

  Split lines:

  for F in *jpg
    do
      convert\
        $F\
        -resize 1000x1000\
        -sharpen 1.2\
        -gravity South\
        -background YellowGreen\
        -splice 0x18\
        -annotate +0+2\
        "$(\
          identify -verbose $F\
          | grep exif\
          | grep Original\
          | tr -s ' '\
          | cut -d ' ' -f3\
          | tr ':' ' '\
          | awk '{print $3 "." $2 "." $1}'\
        )"\
        small/$F
    done

X11 stuff

There are also some hints about making X11 environment more ergonomic:

• console fonts
• controlling screen:
  • turn off/on:

  xset dpms force off/on
  

  • query the state of the screen:

  xset -q