title: Apache: Invalid command 'SSLEngine', perhaps misspelled or defined by a module not included in the server configuration
body: <p>When configure apache2 virtual hosts for ssl/https connection, after adding configuration and enable the configuration with this command " a2ensite pm.university.com.conf " i got this error "Invalid command 'SSLEngine', perhaps misspelled or defined by a module not included in the server configuration". I will answer my own question.</p>