[Linux] Setting up Oracle JRE on linux system

Quick HowTo set up oracle java runtime engine:

1. download Oracle JRE tarball from Oracle Java SE Downloads 
2. make dir/copy to/cd to for java:
   mkdir -p /usr/java/latest && cp ./jre* /usr/java/latest && cd /usr/java/latest
3. unpack: tar zxvf jre*
4. setup alternatives:
   update-alternatives --install "/usr/bin/java" "java" "/usr/java/latest/jre1.7.0_<version>/bin/java" 1
5. setup this java version active:
   update-alternatives --set java /usr/java/latest/jre1.7.0_<version>/bin/java
6. check it:
   java -version
7. PROFIT!!1!11