find(1) . -name '*.ttf' -delete
search for files in a directory hierarchy
find [-H] [-L] [-P] [-D debugopts] [-Olevel] [path...] [expression]
-name pattern
       Base of file name (the path with the leading directories removed) matches shell  pattern  pattern.
       The  metacharacters  (`*',  `?',  and  `[]')  match a `.' at the start of the base name (this is a
       change in findutils-4.2.2; see section STANDARDS CONFORMANCE below).  To ignore  a  directory  and
       the  files  under  it,  use  -prune;  see  an example in the description of -path.  Braces are not
       recognised as being special, despite the fact that some shells including Bash imbue braces with  a
       special  meaning  in  shell  patterns.   The  filename  matching  is performed with the use of the
       fnmatch(3) library function.   Don't forget to enclose the pattern in quotes in order  to  protect
       it from expansion by the shell.
           Delete  files;  true if removal succeeded.  If the removal failed, an error message is issued.  If
           -delete fails, find's exit status will be nonzero (when it  eventually  exits).   Use  of  -delete
           automatically turns on the -depth option.

           Warnings:  Don't  forget  that  the  find  command  line is evaluated as an expression, so putting
           -delete first will make find try to delete everything below the  starting  points  you  specified.
           When  testing a find command line that you later intend to use with -delete, you should explicitly
           specify -depth in order to avoid later surprises.  Because  -delete  implies  -depth,  you  cannot
           usefully use -prune and -delete together.
source manpages: find