Useful script for greping all files excluding those that match specific pattern

grep -Pn 'Win_' `ls -1 *.ahk | grep -vPi 'Win|recall.*ahk' | awk '{printf $1 " "}'`

Usefull windows batch script to convert all files in directory using ImageMagic

This little snippet desaturates, resizes to half and converts to png all files in given directory using ImageMagic.

F:\Canon\Textbook>for %file in (.\*) do convert %file -resize 50% -modulate 100,0 %file.png

Make sure that path to ImageMagic binaries is in your PATH environment variable.