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shell脚本基本语法学习

来源:互联网 作者:佚名 时间:2016-02-26 10:41
无详细内容 无 #! /bin/sh#while 语句echo "enter passwd"read passwdwhile [ $passwd != "aaa" ];doecho "sorry try again"read passwddone#for 语句#! /bin/bashfor i in a b c; do echo "$i\n"done#case 语句#! /bin/shecho "Enter a number"read number
<无详细内容> <无>
#! /bin/sh
#while 语句
echo "enter passwd"
read passwd
while [ $passwd != "aaa" ];do
	echo "sorry try again"
	read passwd
done


#for 语句
#! /bin/bash
for i in a b c; do 
	echo "$i\n"
done

#case 语句

#! /bin/sh

echo "Enter a number"
read number
case $number in
	1)
	echo "you number is 1"
	;;
	2)
	echo "yo number is 2"
	;;
	*)
	exit 1 
	;;
esac 

#if else elif fi 

#! /bin/sh

echo "Is it morning? Please answer yes or no."
read YES_OR_NO
if [ "$YES_OR_NO" = "yes" ]; then
  echo "Good morning!"
elif [ "$YES_OR_NO" = "no" ]; then
  echo "Good afternoon!"
else
  echo "Sorry, $YES_OR_NO not recognized. Enter yes or no."
  exit 1
fi
exit 0


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