編寫shell腳本難免遇到需要交互式輸入指令的步驟：

方法一：

# cat action.sh
#!/bin/sh
read -p "enter number:" no;
read -p "enter number:" name;
echo you have entered $no,$name;

# sh action.sh
enter number:chavin
enter number:king
you have entered chavin,king

# echo -e "chavin\nking\n" | sh action.sh
you have entered chavin,king

或者

# echo -e "chavin\nking\n" > input.data

# cat input.data
chavin
king

# sh action.sh < input.data
you have entered chavin,king

案例1：使用交互式自動化為用戶改密碼：

# useradd chavin0101

# echo -e "dbking588\ndbking588\n" | passwd chavin0101
Changing password for user chavin0101.
New password: Retype new password: passwd: all authentication tokens updated successfully.

方法二：

使用expect實現交互式任務自動化，expect工具在一般發行版中默認沒有安裝，需要手工安裝，這裏就不演示了。

shell腳本之通過發送帶\n字符串或expect腳本實現交互輸入自動化