【CentOS】httpd模块 Job for httpd.service failed because the control process exited with error c_httpd.service:control process exited, code=dumped

项目场景：

学习Linux的httpd模块报错：

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问题描述：

修改httpd 服务程序的主配置文件后，重启httpd服务报了以下错：

[root@localhost ~]# systemctl restart httpd
Job for httpd.service failed because the control process exited with error code. 
See "systemctl status httpd.service" and "journalctl -xe" for details.
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原因分析：

其实最开是就应该想到是配置文件写错了，因为是修改文件后报错的。。。但还是记录一下一步一步的解决问题思路吧。

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解决步骤：

搜索Job for httpd.service failed because the control process exited with error code.的报错信息

1. 先是修改80端口号，改为85、95、8088等都无效
2. （这个没有操作，因为看不懂）查看Apache中的 httpd-vhosts.conf 文件，发现Listen 80 两次，httpd-vhosts.conf一次，httpd.conf一次，虚拟机里的加个#Listen 80
3. 输入systemctl status httpd.service 或 journalctl -xe，发现错误信息为

[root@localhost ~]# systemctl status httpd.service
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2020-11-04 23:46:48 CST; 10s ago
     Docs: man:httpd(8)
           man:apachectl(8)
  Process: 3319 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=0/SUCCESS)
  Process: 3609 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
 Main PID: 3609 (code=exited, status=1/FAILURE)

Nov 04 23:46:48 localhost.localdomain systemd[1]: Starting The Apache HTTP Server...
Nov 04 23:46:48 localhost.localdomain httpd[3609]: AH00526: Syntax error on line 119 of /etc/httpd/conf/httpd.conf:
Nov 04 23:46:48 localhost.localdomain httpd[3609]: DocumentRoot '/home/wwwroot' is not a directory, or is not readable
Nov 04 23:46:48 localhost.localdomain systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Nov 04 23:46:48 localhost.localdomain systemd[1]: Failed to start The Apache HTTP Server.
Nov 04 23:46:48 localhost.localdomain systemd[1]: Unit httpd.service entered failed state.
Nov 04 23:46:48 localhost.localdomain systemd[1]: httpd.service failed.
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4. 查询以下错误信息

DocumentRoot '/home/wwwroot' is not a directory, or is not readable
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以为是SELinux的原因，关闭SELinux后发现还未成功

5. 最后发现是第一步修改httpd的配置文件中Directory目录写错（写多了一个o），conf错误内容如下

#
# DocumentRoot: The directory out of which you will serve your
# documents. By default, all requests are taken from this directory, but
# symbolic links and aliases may be used to point to other locations.
#
DocumentRoot "/home/wwworoot"

#
# Relax access to content within /var/www.
#
<Directory "/home/wwwrooot">
    AllowOverride None
    # Allow open access:
    Require all granted
</Directory>

# Further relax access to the default document root:
<Directory "/home/wwwrooot">
    #
    # Possible values for the Options directive are "None", "All",
    # or any combination of:
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修改Directory目录后正确生效

参考：
https://blog.csdn.net/weixin_30709635/article/details/99143232
https://blog.csdn.net/wangxiaoming099/article/details/23165575
https://blog.csdn.net/zhuoyr/article/details/8393854
https://tpyyes.com/a/linux/616.html（这篇文章最后一句告诉我对症下药，然后我看了我的报错信息）
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