创建用户，设置密码（长度是否大于等于7）

#!/bin/bash

read -p "Please input username: " name

id $name &> /dev/null

if [ $? -ne 0 ];then useradd $name && echo "$name create success." read -sp "Please input password: " pw echo if [ ${#pw} -ge 7 ];then read -sp "Please again input password: " pw2 echo if [ $pw = $pw2 ];then echo $pw |passwd --stdin $name &> /dev/null echo "Password create success." else echo "Inconsistency of password input." fi else echo "Password input error." fi else echo "$name already exist." fi

思路：