How to generate certificate for apache2

If you need to setup ssl (‘https’) connections to your apache2 webserver then use the following steps.

 
sudo mkdir /etc/apache2/ssl
sudo openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout /etc/apache2/ssl/apache.key -out /etc/apache2/ssl/apache.crt
Country Name (2 letter code) [AU]:US
State or Province Name (full name) [Some-State]:New York
Locality Name (eg, city) []:New York City
Organization Name (eg, company) [Internet Widgits Pty Ltd]:Your Company
Organizational Unit Name (eg, section) []:Department of Kittens
Common Name (e.g. server FQDN or YOUR name) []:your_domain.com
Email Address []:your_email@domain.com

Modify the apache2 configuration files:

 
sudo vi /etc/apache2/sites-enabled/default-ssl.conf
SSLCertificateFile /etc/apache2/ssl/apache.crt
SSLCertificateKeyFile /etc/apache2/ssl/apache.key
sudo service apache2 restart

If your application is a web application and you want to access from a mobile device then goto website download cer and it save to device.
Android has an option in the Settings to load the certificate from external storage.