由于本人很笨，第一次学步骤比较多。想学的可以耐下心来看、来学。

实验环境：ContOS 7，Apache服务器

在ContOS中可以运行一下代码直接下载

[root@localhost ~]# yum install -y httpd

下载完可以查看下载的内容

[root@localhost ~]# rpm -ql httpd | less

配置Selinux文件

[root@localhost ~]# vim /etc/selinux/config

找到并改成下面的

SELINUX=disabled

SELINUXTYPE=targeted

关闭防火墙

[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.

启动httpd服务，访问测试

[root@localhost ~]# systemctl start httpd

然后在浏览器输入你CentOS的ip地址，出现下面的页面说明下载完成。

** 一：基于多IP地址方式**

1.创建配置文件

[root@localhost ~]# cd /etc/httpd/conf.d/
[root@localhost conf.d]# vim virtual.conf

在里面将下面代码写入

<VirtualHost 192.168.253.128:80>
ServerName a.com
DocumentRoot "/www/a.com/"
</VirtualHost>

<VirtualHost 192.168.253.129:80>
ServerName b.com
DocumentRoot "/www/b.com/"
</VirtualHost>

2.网卡绑定多个IP（这里我的网卡名是ens33）

[root@localhost conf.d]# ip addr add 192.168.81.137 dev ens33
[root@localhost conf.d]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eno33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:5c:ff:91 brd ff:ff:ff:ff:ff:ff
    inet 192.168.81.136/24 brd 192.168.253.255 scope global dynamic eno16777736
       valid_lft 1542sec preferred_lft 1542sec
    inet 192.168.81.137/32 scope global eno16777736
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe5c:ff91/64 scope link 
       valid_lft forever preferred_lft forever

3.创建虚拟主机a.com和b.com的主页面

[root@localhost conf.d]# mkdir -pv /www/{a.com,b.com}
mkdir: 已创建目录 "/www"
mkdir: 已创建目录 "/www/a.com"
mkdir: 已创建目录 "/www/b.com"

[root@localhost conf.d]# vim /www/a.com/index.html

进入/a.com/index.html,将下面代码写入

Hello,a.com

[root@localhost conf.d]# vim /www/b.com/index.html

进入/b.com/index.html，将下面代码写入

Hello,b.com

4.检查配置问价是否正常

[root@localhost conf.d]# httpd -t
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain. Set the 'ServerName' directive globally to suppress this message
Syntax OK

5.重启httpd服务

[root@localhost conf.d]# systemctl restart httpd

6.打开浏览器，查看结果

** 二、基于多端口方式**

1.创建配置文件

[root@localhost ~]# cd /etc/httpd/conf.d/
[root@localhost conf.d]# vim virtual.conf

将下面代码写入（当然里面有的就不写入了）

<VirtualHost 192.168.253.128:80>
ServerName a.com
DocumentRoot "/www/a.com/"
</VirtualHost>

<VirtualHost 192.168.253.128:8080>
ServerName b.com
DocumentRoot "/www/b.com/"
</VirtualHost>
2.修改httpd主配置文件

[root@localhost conf.d]# vim /etc/httpd/conf/httpd.conf

在里面找到Listen 80,然后在下面写入一行Listen 8080

3.创建虚拟主机a.com和b.com的主页面（前面已经创建过了就不用重复创建）

4.检查配置文件

[root@localhost conf.d]# httpd -t
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain. Set the 'ServerName' directive globally to suppress this message
Syntax OK

5.重启httpd服务

[root@localhost conf.d]# systemctl restart httpd

6.打开浏览器，查看结果

三.基于域名的方式

1.创建配置文件

[root@localhost ~]# cd /etc/httpd/conf.d/
[root@localhost conf.d]# vim virtual.conf

写入下面的代码

<VirtualHost *:80>
ServerName a.com
DocumentRoot "/www/a.com/"
</VirtualHost>

<VirtualHost *:80>
ServerName b.com
DocumentRoot "/www/b.com/"
</VirtualHost>
2.修改物理主机hosts文件（C:\Windows\System32\drivers\etc），这里是因为物理机去访问Apache服务器

在hosts文件里面添加

192.168.81.136 a.com

192.168.81.136 b.com

3.物理主机ping域名测试

4.创建虚拟主机a.com和b.com的主页面（这里前面已经创建过了就不重复了）

5.检查配置文件

[root@localhost conf.d]# httpd -t
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain. Set the 'ServerName' directive globally to suppress this message
Syntax OK

6.重启httpd服务

[root@localhost conf.d]# systemctl restart httpd

7.打开浏览器，查看结果