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fc-cache, fonts.cache - create an index of FreeType
font files in a directory 
fc-cache [directory-name ... ] 
If
directory arguments are not given, fc-cache uses each directory in the current
font configuration.  Each directory is scanned for font files readable by
FreeType.  A cache is created which contains properties of each font and
the associated filename.  This cache is used to speed application startup
when using the fontconfig library. 
- fonts.cache 
- Maps file names to font
properties.  Read by the fontconfig library at application startup to locate
appropriate fonts. 
fontconfig(3)
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