-F Do not follow symbolic links named as operands unless the -H or
-L options are specified. Write a slash ( ’/’ ) immediately
after each pathname that is a directory, an asterisk ( ’*’ )
after each that is executable, a vertical bar ( ’|’ ) after each
that is a FIFO, and an at sign ( ’@’ ) after each that is a sym-
bolic link. For other file types, other symbols may be written.