root@ubuntu1604# systemctl restart apache2

Job for apache2.service failed because the control process exited with error code. See "systemctl status apache2.service" and "journalctl -xe" for details.

root@ubuntu1604# systemctl status apache2

AH00526: Syntax error on line 226 of /etc/apache2/apache2.conf:
Invalid command 'Action', perhaps misspelled or defined by a module not included in the server conf

 解决办法 

root@ubuntu1604# a2enmod actions