001创建用户脚本user.sh

#!/bin/bash
# **********************************************************
# * Author        : hongk
# * Email         : 2608781325@qq.com
# * Create time   : 2023-02-03 13:59
# * Filename      : user.sh
# * Description   :
# **********************************************************
read -p 'please input a username:' u
[ -z $u ] && echo "don't have username" && exit
id $u > /dev/null
if [ $? -eq 0 ];then
        echo "exist!" && exit
else
        useradd $u
        read -p 'please input password:' p
#${p:-123456}是给p变量创建一个初值，给值就是按值赋值，没值就是123456
        echo ${p:-123456} | passwd --stdin $u
fi