% sudo /etc/init.d/apache2 restart
[....] Restarting apache2 (via systemctl): apache2.serviceJob for apache2.service failed because the control process exited with error code.
See "systemctl status apache2.service" and "journalctl -xe" for details.
 failed!
jamroll@Vaio:/usr/src$ systemctl status apache2.service
● 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 Sat 2017-07-15 13:41:26 PDT; 10s ago
  Process: 29328 ExecStop=/usr/sbin/apachectl stop (code=exited, status=1/FAILURE)
  Process: 29816 ExecStart=/usr/sbin/apachectl start (code=exited, status=1/FAILURE)
 Main PID: 28931 (code=exited, status=0/SUCCESS)
      CPU: 61ms

Jul 15 13:41:25 Vaio systemd[1]: Starting The Apache HTTP Server...
Jul 15 13:41:26 Vaio apachectl[29816]: AH00526: Syntax error on line 176 of /etc/apache2/apache2.conf:
Jul 15 13:41:26 Vaio apachectl[29816]: Invalid command 'PerlModule', perhaps misspelled or defined by a module not included in the 
Jul 15 13:41:26 Vaio apachectl[29816]: Action 'start' failed.
Jul 15 13:41:26 Vaio apachectl[29816]: The Apache error log may have more information.
Jul 15 13:41:26 Vaio systemd[1]: apache2.service: Control process exited, code=exited status=1
Jul 15 13:41:26 Vaio systemd[1]: Failed to start The Apache HTTP Server.
Jul 15 13:41:26 Vaio systemd[1]: apache2.service: Unit entered failed state.
Jul 15 13:41:26 Vaio systemd[1]: apache2.service: Failed with result 'exit-code'.

[2]+  Stopped                 systemctl status apache2.service