將文件夾下全部pdf變成黑白的腳本

#!/bin/bash for file in ./*.pdf do echo "$file" gs -o black+white.pdf -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress -sColorConversionStrategy=Gray -sColorConversionStrategyForImages=Gray -sProcessColo

>>阅读原文<<