#!/bin/bash
#testing the read command  echo -n "Enter you name:"   #echo -n 让用户直接在后面输入
read name  #输入的多个文本将保存在一个变量中
echo "Hello $name, welcome to my progra  

# ./read.sh
Enter you name: yuan
Hello yuan, welcome to my program  　

#!/bin/bash
#testing the read -p option
read -p "Please enter your age: " age
days=$[ $age * 365 ]
echo "That makes you over $days days old!"  

#!/bin/bash
# entering multiple variables  read -p "Enter your name:" first last
echo "Checking data for $last, $first"  

# ./read1.sh
Enter your name: a b
Checking data for b, a  

#!/bin/bash
# timing the data entry  if read -t 5 -p "Please enter your name: " name     #记得加-p参数， 直接在read命令行指定提示符
then  echo "Hello $name, welcome to my script"
else  echo   echo "Sorry, too slow!"
fi  

# ./read3.sh
Please enter your name:
Sorry, too slow!  # ./read3.sh
Please enter your name: wang
Hello wang, welcome to my script  

#!/bin/bash  read -p "Please input(Y/N):" yn
[ "$yn" == "Y" -o "$yn" == "y" ]&&echo  "OK,continue"&&exit 0
[ "$yn" == "N" -o "$yn" == "n" ]&&echo "Oh,interrupt!"&&exit 0
echo "i don't konw what your choice is"&&exit 0

yuanqiangfei@ubuntu:~/script$ ./sh01.sh
Please input(Y/N):y
OK,continue
yuanqiangfei@ubuntu:~/script$ ./sh01.sh
Please input(Y/N):n
Oh,interrupt!  

#!/bin/bash
#entering muiltple variables  while true
do  read -s -p "Please enter your password:"  passwd  [ "$passwd" == "123456" ]&&echo "password is right!"&&exit 0  [ "$passwd" != "123456" ]&&echo "password is not right,Please input again!"&&continue
done  

yuanqiangfei@ubuntu:~/script$ ./read.sh
Please enter your password:password is right!
yuanqiangfei@ubuntu:~/script$ ./read.sh
Please enter your password:password is not right,Please input again!
Please enter your password:  

#!/bin/bash
# reading data from a file  count=1
cat test | while read line
do  echo "Line $count: $line"  count=$[ $count + 1 ]
done
echo "Finished processing the file"