我正在使用Ubuntu 18.04运行Apache2 LAMP服务器，并且突然没有警告，Apache停止运行。我尝试用sudo service apache2 status解决问题，它显示以下内容：
sudo service apache2 status
● apache2.service - The Apache HTTP Server
Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
Drop-In: /lib/systemd/system/apache2.service.d
└─apache2-systemd.conf
Active: failed (Result: exit-code) since Mon 2018-09-03 13:07:40 UTC; 1h 6min ago
Process: 55939 ExecStart=/usr/sbin/apachectl start (code=exited, status=1/FAILURE)
Main PID: 128448 (code=exited, status=1/FAILURE)
Sep 03 13:07:40 localhost systemd[1]: Starting The Apache HTTP Server...
Sep 03 13:07:40 localhost apachectl[55939]: Action 'start' failed.
Sep 03 13:07:40 localhost apachectl[55939]: The Apache error log may have more information.
Sep 03 13:07:40 localhost systemd[1]: apache2.service: Control process exited, code=exited status=1
Sep 03 13:07:40 localhost systemd[1]: apache2.service: Failed with result 'exit-code'.
Sep 03 13:07:40 localhost systemd[1]: Failed to start The Apache HTTP Server.
我做的第一件事是尝试用sudo apachectl restart手动启动它，结果如下：
sudo apachectl restart
httpd not running, trying to start
Action 'restart' failed.
The Apache error log may have more information.
所以我用sudo view /var/log/apache2/error.log检查日志，它显示了一个很长的列表，如下所示：
PHP Warning: Module 'mbstring' already loaded in Unknown on line 0
PHP Warning: Module 'xmlrpc' already loaded in Unknown on line 0
PHP Warning: Module 'mcrypt' already loaded in Unknown on line 0
[Mon Sep 03 06:25:03.860913 2018] [ssl:emerg] [pid 128448] AH02572: Failed to configure at least one certificate and key for hailiga.org:443
[Mon Sep 03 06:25:03.860996 2018] [ssl:emerg] [pid 128448] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: DH PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 06:25:03.861009 2018] [ssl:emerg] [pid 128448] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: EC PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 06:25:03.861060 2018] [ssl:emerg] [pid 128448] SSL Library Error: error:140A80B1:SSL routines:SSL_CTX_check_private_key:no certificate assigned
[Mon Sep 03 06:25:03.861077 2018] [ssl:emerg] [pid 128448] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/apache2/error.log for more information
[Mon Sep 03 06:25:03.861086 2018] [:emerg] [pid 128448] AH00020: Configuration Failed, exiting
[Mon Sep 03 06:41:32.662021 2018] [ssl:emerg] [pid 53226] AH02572: Failed to configure at least one certificate and key for hailiga.org:443
[Mon Sep 03 06:41:32.662102 2018] [ssl:emerg] [pid 53226] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: DH PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 06:41:32.662112 2018] [ssl:emerg] [pid 53226] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: EC PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 06:41:32.662122 2018] [ssl:emerg] [pid 53226] SSL Library Error: error:140A80B1:SSL routines:SSL_CTX_check_private_key:no certificate assigned
[Mon Sep 03 06:41:32.662127 2018] [ssl:emerg] [pid 53226] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/apache2/error.log for more information
AH00016: Configuration Failed
[Mon Sep 03 13:05:09.612981 2018] [ssl:emerg] [pid 55512] AH02572: Failed to configure at least one certificate and key for hailiga.org:443
[Mon Sep 03 13:05:09.613049 2018] [ssl:emerg] [pid 55512] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: DH PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:05:09.613058 2018] [ssl:emerg] [pid 55512] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: EC PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:05:09.613068 2018] [ssl:emerg] [pid 55512] SSL Library Error: error:140A80B1:SSL routines:SSL_CTX_check_private_key:no certificate assigned
[Mon Sep 03 13:05:09.613072 2018] [ssl:emerg] [pid 55512] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/apache2/error.log for more information
AH00016: Configuration Failed
[Mon Sep 03 13:07:40.617846 2018] [ssl:emerg] [pid 55942] AH02572: Failed to configure at least one certificate and key for hailiga.org:443
[Mon Sep 03 13:07:40.618439 2018] [ssl:emerg] [pid 55942] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: DH PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:07:40.618451 2018] [ssl:emerg] [pid 55942] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: EC PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:07:40.618461 2018] [ssl:emerg] [pid 55942] SSL Library Error: error:140A80B1:SSL routines:SSL_CTX_check_private_key:no certificate assigned
[Mon Sep 03 13:07:40.618466 2018] [ssl:emerg] [pid 55942] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/apache2/error.log for more information
AH00016: Configuration Failed
[Mon Sep 03 13:14:43.673776 2018] [ssl:emerg] [pid 56048] AH02572: Failed to configure at least one certificate and key for hailiga.org:443
[Mon Sep 03 13:14:43.673881 2018] [ssl:emerg] [pid 56048] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: DH PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:14:43.673895 2018] [ssl:emerg] [pid 56048] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: EC PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:14:43.673918 2018] [ssl:emerg] [pid 56048] SSL Library Error: error:140A80B1:SSL routines:SSL_CTX_check_private_key:no certificate assigned
[Mon Sep 03 13:14:43.673924 2018] [ssl:emerg] [pid 56048] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/apache2/error.log for more information
AH00016: Configuration Failed
[Mon Sep 03 13:24:44.627730 2018] [ssl:emerg] [pid 56066] AH02572: Failed to configure at least one certificate and key for hailiga.org:443
[Mon Sep 03 13:24:44.627812 2018] [ssl:emerg] [pid 56066] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: DH PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:24:44.627822 2018] [ssl:emerg] [pid 56066] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: EC PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:24:44.627839 2018] [ssl:emerg] [pid 56066] SSL Library Error: error:140A80B1:SSL routines:SSL_CTX_check_private_key:no certificate assigned
[Mon Sep 03 13:24:44.627845 2018] [ssl:emerg] [pid 56066] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/apache2/error.log for more information
AH00016: Configuration Failed
[Mon Sep 03 13:50:11.691451 2018] [ssl:emerg] [pid 56308] AH02572: Failed to configure at least one certificate and key for hailiga.org:443
[Mon Sep 03 13:50:11.691543 2018] [ssl:emerg] [pid 56308] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: DH PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:50:11.691552 2018] [ssl:emerg] [pid 56308] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: EC PARAMETERS) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[Mon Sep 03 13:50:11.691569 2018] [ssl:emerg] [pid 56308] SSL Library Error: error:140A80B1:SSL routines:SSL_CTX_check_private_key:no certificate assigned
[Mon Sep 03 13:50:11.691574 2018] [ssl:emerg] [pid 56308] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/apache2/error.log for more information
AH00016: Configuration Failed
[Mon Sep 03 14:07:10.776987 2018] [ssl:emerg] [pid 56364] AH02572: Failed to configure at least one certificate and key for hailiga.org:443
我试过phpdismod三个错误模块，它没有用。我正在运行PHP 7.2和php7.0-fpm，因为SSL我安装了Let's Encrypt Certbot。
有人可以告诉我发生了什么事吗？
发现问题，我的apache配置文件中的代码已损坏。
对于那些有相同问题的人，如何解决它：
cd /etc/apache2/sites-available转到Apache2站点可用目录sudo a2dissite example.com.conf example-2.com.conf ...禁用所有配置文件（现在忽略systemctl reload apache2，我们稍后会介绍）sudo a2ensite 000-default.conf启用默认配置文件sudo systemctl reload apache2重新加载Apache2sudo a2ensite test-1.conf逐个启用配置文件，找出哪一个已损坏，并使用sudo systemctl reload apache2重新加载apache，最后测试它是否与sudo service apache2 status一起使用sudo a2dissite 000-default.conf禁用默认值，检查Apache是否正在运行sudo service apache2 status。你有它！无论如何，这就是我修复它的方式。哦，禁用和启用配置文件可能会导致指向错误的目录，当您启用所有这些目录时，它应该恢复正常。
祝你有美好的一天：D