写一个Linux CentOs7的系统配置初始化的脚本

#!/bin/bash

# 设置主机名
echo "请输入主机名："
read hostname
hostnamectl set-hostname $hostname

# 设置时区
timedatectl set-timezone Asia/Shanghai

# 安装常用软件
yum -y install net-tools wget vim

# 关闭防火墙
systemctl stop firewalld
systemctl disable firewalld

# 关闭SELinux
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
setenforce 0

# 修改SSH端口号
echo "请输入新的SSH端口号："
read ssh_port
sed -i "s/#Port 22/Port $ssh_port/g" /etc/ssh/sshd_config
systemctl restart sshd

# 添加新用户
echo "请输入新用户的用户名："
read username
useradd $username
echo "请输入新用户的密码："
read password
echo $password | passwd $username --stdin

# 设置sudo权限
echo "$username ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers.d/$username

# 安装常用程序
yum -y install epel-release
yum -y install htop iftop iotop lrzsz tree

# 安装Nginx
yum -y install nginx
systemctl start nginx
systemctl enable nginx

# 安装MySQL
yum -y install mariadb mariadb-server
systemctl start mariadb
systemctl enable mariadb
mysql_secure_installation

# 安装PHP
yum -y install php php-fpm php-mysql
systemctl start php-fpm
systemctl enable php-fpm

# 安装Node.js
curl -sL https://rpm.nodesource.com/setup_14.x | bash -
yum -y install nodejs

# 安装Docker
yum -y install docker
systemctl start docker
systemctl enable docker

echo "系统初始化完成！"