使用set -x查看输出过程
#!/bin/sh
#set -x
echo -n "Can you write device drivers? "
read answer
answer=`echo $answer | tr [a-z] [A-Z]`
if [ $answer = Y ]
then
echo "Wow, you must be very skilled"
else
echo "Neither can I, I'm just an example shell
script"
script"
fi
读书笔记：echo -n 中-n意思是说输出这一行后没有换行符
answer=`echo $answer | tr [a-z] [A-Z]`中
tr命令用于将英文字符全部转换成大写
tr命令用于将英文字符全部转换成大写