When you do not have superuser access to install fonts on the system level, or you only need to install a font that will be available to your user account only, there are two methods to do it.
The *Gnome Font Viewer* is an application to display the fonts installed on the system. It also allows you to locally install fonts. To add a new font file with *Gnome Font Viewer*:
If you do not want to use any tools to add new fonts, you can do it manually. Copy the font files in the `.fonts` directory placed in the user's directory and update the font cache.