Você deve dar uma olhada na opção -type de find no manual:
-type c
File is of type c:
b block (buffered) special
c character (unbuffered) special
d directory
p named pipe (FIFO)
f regular file
l symbolic link; this is never true if the -L option or the -fol‐
low option is in effect, unless the symbolic link is broken.
If you want to search for symbolic links when -L is in effect,
use -xtype.
s socket
D door (Solaris)