输入：systemctl start nginx
报错：Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.

输入：systemctl status nginx.service
输出的信息是：
● nginx.service - LSB: starts the nginx web server
Loaded: loaded (/etc/rc.d/init.d/nginx; bad; vendor preset: disabled)
Active: failed (Result: exit-code) since Mon 2017-05-22 10:31:00 CST; 1s ago

 Docs: man:systemd-sysv-generator(8)

Process: 15532 ExecStart=/etc/rc.d/init.d/nginx start (code=exited, status=1/FAILURE)

May 22 10:31:00 iZuf69lc6nd4b4dpp4r982Z systemd[1]: Starting LSB: starts the nginx web server...
May 22 10:31:00 iZuf69lc6nd4b4dpp4r982Z nginx[15532]: Starting nginx... nginx (pid 15467 15466) already ...ng.
May 22 10:31:00 iZuf69lc6nd4b4dpp4r982Z systemd[1]: nginx.service: control process exited, code=exited s...s=1
May 22 10:31:00 iZuf69lc6nd4b4dpp4r982Z systemd[1]: Failed to start LSB: starts the nginx web server.
May 22 10:31:00 iZuf69lc6nd4b4dpp4r982Z systemd[1]: Unit nginx.service entered failed state.
May 22 10:31:00 iZuf69lc6nd4b4dpp4r982Z systemd[1]: nginx.service failed.
Hint: Some lines were ellipsized, use -l to show in full.

小白一个，实在不知道出错在哪。
我也试过单独安装nginx，但结果一样公网IP不能访问