查看Apache是否加入到到开机自启动列表
systemctl list-unit-files | grep httpd
httpd.service disabled

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将Apache加入到开机自启动中
systemctl enable httpd
Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service.

再次确认
systemctl list-unit-files | grep httpd
httpd.service enabled

启动Apache
systemctl start httpd
netstat -lnt | grep 80
tcp 0 0 10.211.55.15:80 0.0.0.0:* LISTEN

查看Apache状态
systemctl status httpd
● httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2019-12-16 15:16:35 CST; 7min ago
Docs: man:httpd(8)
man:apachectl(8)
Main PID: 2040 (httpd)
Status: "Total requests: 0; Current requests/sec: 0; Current traffic: 0 B/sec"
Tasks: 6
CGroup: /system.slice/httpd.service
├─2040 /usr/sbin/httpd -DFOREGROUND
├─2041 /usr/sbin/httpd -DFOREGROUND
├─2042 /usr/sbin/httpd -DFOREGROUND
├─2043 /usr/sbin/httpd -DFOREGROUND
├─2044 /usr/sbin/httpd -DFOREGROUND
└─2045 /usr/sbin/httpd -DFOREGROUND

新闻标题：centos7设置Apache开机自启动
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