[root@VM_58_118_centos dbback]# a2enmod ssl

[root@VM_58_118_centos dbback]# service apache2 restart

[root@VM_58_118_centos dbback]# /etc/apache2/sites-enabled
[root@VM_58_118_centos dbback]# ll /etc/ssl/certs
total 20
drwxr-xr-x 2 root root 4096 Nov 29 15:39 ./
drwxr-xr-x 4 root root 4096 Nov 15 18:38 ../
-rw-r--r-- 1 root root 1679 Nov 29 15:11 3162396_api.zhinengyingjian.work_chain.crt
-rw-r--r-- 1 root root 1675 Nov 29 15:11 3162396_api.zhinengyingjian.work.key
-rw-r--r-- 1 root root 2004 Nov 29 15:11 3162396_api.zhinengyingjian.work_public.crt

[root@VM_58_118_centos dbback]# vim /etc/apache2/sites-enabled/default-ssl.conf