How to extend lvm?

How to extend lvm? 

list logical volumes
# lvscan

extend volume (parameter -L+3G means "add 3GB to volume")
# lvextend -L+3G /dev/lv-group/lv-volume

extend filesystem (it cannot shrink filesystem size!)
# resize2fs /dev/lv-group/lv-volume

Java and debian jessie

installing oracle java: 

 if you need java for a while, no root account - try to use ahh java (project is still beta)

https://github.com/dominikdz/ahh

 also check this page

http://scaledcode.blogspot.com/2014/07/installing-oracle-jdk-on-debian.html