By default, Ubuntu hides hidden files and folders. If you want to view them, you can do it from the file browser Nautilus or from the command line terminal. Here is how:

File Browser Nautilus:

While you have the file browser open, just hit "Ctrl + h". That will allow you to view the hidden files and folders.

Terminal:

The "ls" command will only display files and directories that aren't hidden unless you supply the -a switch. "ls -a" will show you all files and directories, including hidden ones.