#!/bin/bash
function getdir(){
    for element in `ls $1`
    do  
        dir_or_file=$1"/"$element
        if [ -d $dir_or_file ]
        then 
            getdir $dir_or_file
        else
            echo $dir_or_file
        fi  
    done
}
root_dir="$1"
getdir $root_dir

测试：

参考;https://www.cnblogs.com/xiaopipi/p/6214673.html