sh脚本判断路径是否存在

 （1）判断是否存在：

#!/bin/bash

if [ -d "/path/to/directory" ]; then
    echo "Directory exists"
else
    echo "Directory does not exist"
fi

 （2）判断不存在：

if [ ! -d "/path/to/directory" ]; then
    echo "Directory does not exist"
fi