用Shell编程，判断一文件是不是块或字符设备文件，如果是将其拷贝到 /dev 目录下。
如题：
答案如下：
#!/bin/bash
read -p "Input a filename : " filename
if [ -b "$filename" -o -c "$filename" ]
then
echo "$filename is a device file" && cp $filename /dev/ &
else
echo "$filename is not a device file" && exit 1
fi
答案如下：
#!/bin/bash
read -p "Input a filename : " filename
if [ -b "$filename" -o -c "$filename" ]
then
echo "$filename is a device file" && cp $filename /dev/ &
else
echo "$filename is not a device file" && exit 1
fi
none
