批量添加用户的shell脚本

1.建立一个用户名的文件，如下

vim /shell/students.txt

hankunfa1

hankunfa2

hankunfa3

2.编写shell脚本

vim /shell/useradd.sh

#!/bin/bash

cat /shell/students.txt |while read STU
do
id $STU >/dev/null 2>&1
        if [ $? -eq 0 ];then
        echo "the user $STU is exist ,please give me another name "
        else
        useradd $STU
        echo "123456"|passwd --stdin $STU >/dev/null 2>&1
        echo "the user $STU has been created"
        fi

done

执行命令

/bin/bash    /shell/useradd.sh