[root@www yum]# systemctl status nginx
● nginx.service - nginx - high performance web server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since 四 2019-05-09 19:07:29 CST; 43s ago
     Docs: http://nginx.org/en/docs/
  Process: 3593 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=1/FAILURE)

5月 09 19:07:26 www.apachetest.com nginx[3593]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address alr...use)
5月 09 19:07:27 www.apachetest.com nginx[3593]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address alr...use)
5月 09 19:07:27 www.apachetest.com nginx[3593]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address alr...use)
5月 09 19:07:28 www.apachetest.com nginx[3593]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address alr...use)
5月 09 19:07:28 www.apachetest.com nginx[3593]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address alr...use)
5月 09 19:07:29 www.apachetest.com systemd[1]: nginx.service: control process exited, code=exited status=1
5月 09 19:07:29 www.apachetest.com nginx[3593]: nginx: [emerg] still could not bind()
5月 09 19:07:29 www.apachetest.com systemd[1]: Failed to start nginx - high performance web server.
5月 09 19:07:29 www.apachetest.com systemd[1]: Unit nginx.service entered failed state.
5月 09 19:07:29 www.apachetest.com systemd[1]: nginx.service failed.
Hint: Some lines were ellipsized, use -l to show in full.

倒数第4行和倒数第6行是报错加粗的部分。