How To Refresh Linux Font Cache

To refresh your Linux machine’s font cache, type: where -f means forced (we want to refresh everything) and -v means verbose, in order to print some useful information on installed fonts and newly discovered ones. Source

Where Linux Stores Fonts

While fonts on your Linux box can be located in many different directories, there are some standard installation destinations. /usr/share/fonts  /usr/local/share/fonts  ~/.fonts Any of these folders will work for you. REMEMBER ::: fonts in ~/.fonts directory will be available only for your presently active user. Source