fc-list

List fonts matching

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List all available fonts

fc-list

Display entire font pattern verbosely

fc-list -v        

Display entire font pattern briefly

fc-list -b          

Print only the names of the font families without display the other aforementioned details

fc-list : family 

Select the file location, spacing or/and style of the required fonts to be displayed onscreen

fc-list : family style 

Sorting and unique can also be incorporated along with this command

fc-list : family spacing | sort | uniq    

This option is used to format the output text to the required pattern given by user

fc-list --format="%{family[0]}\n" | sort | uniq