批量更改扩展名

rename 's/\.png/\.PNG/' *.png

rename 's/\.mp3/\.MP3/' *.mp3
rename .mp3 .MP3 *.mp3

rename GIF gif *.GIF
		

for file in *.GIF
do
        mv $file ${file%.*}.gif
done
		

$ mkdir chapter.command.xxx.xml
$ mkdir chapter.command.bbb.xml
$ mkdir chapter.command.ccc.xml
$ mkdir chapter.command.ddd.xml

$ rename 's/command/cmd/' *.command.*.xml