Linux记录-批量更改当前目录的文件后缀名

#!/bin/bash
path=.

for file in $(ls $path)
do
    if [ -f $file ]
    then
        filename=${file%.*}
        bak=${file#*.}
        if [ $bak == "$1" ]
        then
          mv $filename"."$1 $filename"."$2
        fi
    fi
done

exit 0

执行：sh mv.sh  sh doc