主观题：h0020.用shell 编程，判断一文件是不是字符设备文件，如果是将其拷贝到/dev 目录下。
用shell 编程，判断一文件是不是字符设备文件，如果是将其拷贝到/dev 目录下。
答案：#!/bin/bash
directory=/dev
for file in anaconda-ks.cfg install.log install.log.syslog
do
if [ -f $file ]
then
cp $file $directory/$file.bak
echo " HI, $LOGNAME $file is backed up already in $directory !!"
fi
done
答案：#!/bin/bash
directory=/dev
for file in anaconda-ks.cfg install.log install.log.syslog
do
if [ -f $file ]
then
cp $file $directory/$file.bak
echo " HI, $LOGNAME $file is backed up already in $directory !!"
fi
done
