Installing multiple fonts Ubuntu
If you have a huge collection of fonts to install, opening all of them in Font Viewer and then clicking Install button can be tiresome. Instead, select and copy all fonts. Now go to the Home Folder (Places > Home Folder) and press Ctrl+H to show hidden files and folders. If you don’t find a folder called .fonts, create one with this name. Paste the fonts in this folder.
All hidden folders in Ubuntu begin with a dot. So when you create a .fonts folder, you are creating a hidden folder that is used for custom fonts of the user whose Home Folder it is. The Home Folder has the same name as the Ubuntu user.