There are options that aren't valid, like "-c". Please remove the unusable options.

usage: mongofiles [options] command [gridfs filename]
command:
one of (list|search|put|get)
list - list all files. 'gridfs filename' is an optional prefix
which listed filenames must begin with.
search - search all files. 'gridfs filename' is a substring
which listed filenames must contain.
put - add a file with filename 'gridfs filename'
get - get a file with filename 'gridfs filename'
delete - delete all files with filename 'gridfs filename'
options:
--help produce help message
-v [ --verbose ] be more verbose (include multiple times for more
verbosity e.g. -vvvvv)
-h [ --host ] arg mongo host to connect to ("left,right" for pairs)
--port arg server port. Can also use --host hostname:port
--ipv6 enable IPv6 support (disabled by default)
-u [ --username ] arg username
-p [ --password ] arg password
--dbpath arg directly access mongod database files in the given
path, instead of connecting to a mongod server -
needs to lock the data directory, so cannot be used
if a mongod is currently accessing the same path
--directoryperdb if dbpath specified, each db is in a separate
directory
-d [ --db ] arg database to use
-c [ --collection ] arg collection to use (some commands)
-l [ --local ] arg local filename for put|get (default is to use the
same name as 'gridfs filename')
-t [ --type ] arg MIME type for put (default is to omit)
-r [ --replace ] Remove other files with same name after PUT