How to install Open JDK on Xubuntu


In case you prefer the open source solution for java, then you need to install open JDK on your xubuntu instead of oracle JDK. To install open JDK on xubuntu, no need to add ppa repository, because it already exist on xubuntu/ubuntu default repo.

How to install Oracle JDK on Xubuntu


If you need to install java on your system, you can't go wrong by choosing oracle JDK instead of open JDK, because some people said that oracle JDK is more reliable because it's maintain by company that create java itself.

How to delete user on Xubuntu


If you have root permission, it is also possible to delete a user, there is a dedicated command for deleting user on xubuntu, just like creating new user, this can be done through command line as well.