http://www.orangepi.org/orangepibbsen/forum.php?mod=viewthread&tid=3049&highlight=cam&mobile=2

http://www.orangepi.org/orangepibbsen/forum.php?mod=viewthread&tid=2430&highlight=cam&mobile=2

https://unix.stackexchange.com/questions/283722/how-to-connect-to-wifi-from-command-line

https://forum.armbian.com/topic/1629-uart-on-gpio-pins-orange-pi-lite/

https://en.m.wikipedia.org/wiki/Progressive_Web_Apps

https://en.m.wikipedia.org/wiki/List_of_application_servers

Source: Apache: Generate CSR (Certificate Signing Request) | SSL Certificates – GoDaddy Help GB

Source: php – MySql select every second, and third record from database – Stack Overflow

Source: php – MySql select every second, and third record from database – Stack Overflow

OpenJDK 8 for Trusty isn’t available in the official Ubuntu repositories.
As a workaround, you can install OpenJDK 8 from a PPA.
Open a terminal and execute:

sudo apt-add-repository ppa:openjdk-r/ppa
sudo apt-get update
sudo apt-get install openjdk-8-jdk

Or if you only need the JRE

sudo apt-get install openjdk-8-jre

It is usual that several major versions are installed in parallel.

To switch between Java 7 and Java 8 use this command:

sudo update-alternatives --config java

Source: how can i upgrade only jre from 7 to jre 8 on ubuntu 1404 – Ask Ubuntu

Source: bash – Tomcat does not recognize JAVA_HOME – Ask Ubuntu