The excelent HOW TO install JAVA on Linux Ubuntu

http://www.wikihow.com/Install-Oracle-Java-JDK-on-Ubuntu-Linux
https://www.digitalocean.com/community/tutorials/java-ubuntu-apt-get-ru

UBUNTU 12.04 BROADBAND WiFi firmware issues

THIS POST IS WORTH TO BE WRITTEN IN CAPITALS

If you've installed Ubuntu 12.04 or etc and your WiFi does not work install b43 driver!!!

FOLLOW THE INSTRUCTIONS OF THIS LINK:

download these 2 files:

http://downloads.openwrt.org/sources/wl_apsta-3.130.20.0.o
and
http://mirror2.openwrt.org/sources/broadcom-wl-4.150.10.5.tar.bz2

cd ~ 

tar -xjvf broadcom-wl-4.150.10.5.tar.bz2 

sudo b43-fwcutter -w /lib/firmware wl_apsta-3.130.20.0.o 

sudo b43-fwcutter --unsupported -w /lib/firmware broadcom-wl-4.150.10.5/driver/wl_apsta_mimo.o 
sudo chmod 775 /lib/firmware/b43 

sudo chmod 775 /lib/firmware/b43legacy

REBOOT THE PC AND CHECK WiFi connection.

How to write right an *.iso file on Mac

In short: Do it through DiskUtility app on your Mac!!!

https://help.ubuntu.com/community/BurningIsoHowto