[Ubuntu] Keep the data of /home and remove configuration on Ubuntu

Delete configuration:

1. At terminal, type "sudo nautilus" to open file manager.
2. Press "CTRL+H" to show the hidden file.
3. Delete the folder of “lost+found” and “.Trash-0” under /home
4. Delete all folder which have “."  infront of name under /username (my username is happy)

Reference :

• 重裝Ubuntu时如何保留/home