Delete can be used to delete any file from your directory.
However, files with certain kinds of protection (specifically,
files without write permission for you), require additional
confirmation, even after the first <nl>.  This kind of confirmation
is requested by the message (for example):

<filename>: 100444 mode 
to which you must respond with a 'y' or else no action is taken.

E.g.:
& del foo.bas fum.pro<esc> [confirm] <nl>
fum.pro: 100444 mode y<nl>
&
