To add a font for all users, perform the following steps:
Copy the font file to one of the directories in the /etc/fonts/fonts.conf file. Typically, additional fonts are stored in the /usr/share/fonts/ directory.
The fontconfig library updates the list of fonts automatically. If the list of fonts is not updated, execute the following command:
# fc-cache
Alternatively, to update only from a specific directory, execute the following command:
# fc-cache directory-name
Alternatively, to update only from the directories in /etc/fonts/fonts.conf, and to view a list of the updated directories, execute the following command:
# fc-cache --system-only -v