因此，今天早上我从Webmin删除了一个域，此后，我的Centos 7 VPS上的所有网站均无法正常运行。我看到Apache没有启动，并且 systemctl重新启动httpd 之后，我得到了：
httpd.service的Job失败，因为控制进程退出并显示错误代码。有关详细信息，请参见“ systemctl状态httpd.service”和“ journalctl -xe”。
在 systemctl状态为httpd.service 之后，我得到了：
httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor
preset: disabled)
Active: failed (Result: exit-code) since Thu 2019-05-30 12:57:01 EEST; 6s
ago
Docs: man:httpd(8)
man:apachectl(8)
Process: 6445 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited,
status=1/FAILURE)
Process: 6443 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND
(code=exited, status=1/FAILURE)
Main PID: 6443 (code=exited, status=1/FAILURE)
May 30 12:57:01 mamatextile.mamatextile.cz systemd[1]: Starting The
Apache HTTP Server...
May 30 12:57:01 mamatextile.mamatextile.cz httpd[6443]: (98)Address
already in use: AH00072: make_sock: could not bind to address
89. .....
May 30 12:57:01 mamatextile.mamatextile.cz httpd[6443]: no listening
sockets available, shutting down
May 30 12:57:01 mamatextile.mamatextile.cz httpd[6443]: AH00015: Unable
to open logs
May 30 12:57:01 mamatextile.mamatextile.cz systemd[1]: httpd.service:
main process exited, code=exited, status=1/FAILURE
May 30 12:57:01 mamatextile.mamatextile.cz kill[6445]: kill: cannot find
process ""
May 30 12:57:01 mamatextile.mamatextile.cz systemd[1]: httpd.service:
control process exited, code=exited status=1
May 30 12:57:01 mamatextile.mamatextile.cz systemd[1]: Failed to start
The Apache HTTP Server.
May 30 12:57:01 mamatextile.mamatextile.cz systemd[1]: Unit httpd.service
entered failed state.
May 30 12:57:01 mamatextile.mamatextile.cz systemd[1]: httpd.service
failed.
在 journalct -xe
之后-- Unit httpd.service has begun starting up.
May 30 13:17:08 mamatextile.mamatextile.cz httpd[7981]: (98)Address
already in use: AH00072: make_sock: could not bind to address 89. .....
May 30 13:17:08 mamatextile.mamatextile.cz httpd[7981]: no listening
sockets available, shutting down
May 30 13:17:08 mamatextile.mamatextile.cz httpd[7981]: AH00015: Unable to
open logs
May 30 13:17:09 mamatextile.mamatextile.cz systemd[1]: httpd.service: main
process exited, code=exited, status=1/FAILURE
May 30 13:17:09 mamatextile.mamatextile.cz kill[7983]: kill: cannot find
process ""
May 30 13:17:09 mamatextile.mamatextile.cz systemd[1]: httpd.service:
control process exited, code=exited status=1
May 30 13:17:09 mamatextile.mamatextile.cz systemd[1]: Failed to start The
Apache HTTP Server.
-- Subject: Unit httpd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit httpd.service has failed.
在httpd -t之后，它表示语法可以。