shell初学

超简单的一段shell代码，查看电脑属性，删除无效安装包，查看天气。FYI 

#!/bin/bash
echo -e '\n'
echo "Hello,`whoami`"
echo "-----------------------------------------------------------------------"
echo "Now time is:`date`"
#wheather info
if [ -e "101020100.html" ];then
rm -f .html
wget http://www.weather.com.cn/data/cityinfo/101020100.html -q
else
wget http://www.weather.com.cn/data/cityinfo/101020100.html -q
fi
var=$(cat .html)
#echo "天气信息：" $var
echo $var | awk -F '"' '{print $6 "   " $14 " ~ " $18 "   " $22 " [ " $34 " ] "}'
echo "-----------------------------------------------------------------------"
echo -e '\n'
echo "-----------------------------------------------------------------------"
echo -e "The PC Info:"
uname -a
echo "-----------------------------------------------------------------------"
echo -e '\n'
echo "-----------------------------------------------------------------------"
echo 'Shall you clean trash?'
echo "Please input (y\n)"
read char
if [ $char == 'y' ];then
#delete useless install package
sudo apt-get autoclean
sudo apt-get clean
sudo apt-get autoremove
else
echo "You selected no"
fi
echo "-----------------------------------------------------------------------"
echo "Press anykey to exit..."