操作命令：
yum -y install httpd*
安装完成之后，（一个软件安装之后）注意三个东西
- 服务的脚本位置
- 工作区（网站的根目录位置）
- 配置文件的位置
如下：
启用httpd.service 命令：
systemctl enable httpd.service
操作如下：
[root@localhost httpd]# systemctl enable httpd.service
Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service → /usr/lib/systemd/system/httpd.service.
[root@localhost httpd]#
启动httpd.service
systemctl start httpd.service
查看进程： pstree |grep httpd
[root@localhost httpd]# pstree |grep httpd
|-httpd-+-httpd
| |-httpd---80*[{httpd}]
| `-2*[httpd---64*[{httpd}]]
[root@localhost httpd]#
查看80端口：netstat -tunpl
[root@localhost httpd]# netstat -tunpl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN 1971/dnsmasq
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1013/sshd
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 1014/cupsd
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1/systemd
tcp6 0 0 :::22 :::* LISTEN 1013/sshd
tcp6 0 0 ::1:631 :::* LISTEN 1014/cupsd
tcp6 0 0 :::111 :::* LISTEN 1/systemd
tcp6 0 0 :::80 :::* LISTEN 37483/httpd
udp 0 0 0.0.0.0:5353 0.0.0.0:* 870/avahi-daemon: r
udp 0 0 0.0.0.0:50596 0.0.0.0:* 870/avahi-daemon: r
udp 0 0 192.168.122.1:53 0.0.0.0:* 1971/dnsmasq
udp 0 0 0.0.0.0:67 0.0.0.0:* 1971/dnsmasq
udp 0 0 192.168.225.128:68 0.0.0.0:* 998/NetworkManager
udp 0 0 0.0.0.0:111 0.0.0.0:* 1/systemd
udp6 0 0 :::5353 :::* 870/avahi-daemon: r
udp6 0 0 :::111 :::* 1/systemd
udp6 0 0 :::34958 :::* 870/avahi-daemon: r
[root@localhost httpd]#