my $term = new Term::ReadLine 'Command Line Interface';
my $attribs = $term->Attribs;
$attribs->{completion_entry_function} = $attribs->{'list_completion_function'};
$attribs->{completion_word} = \@commands;   # array of supported commands

##</code><code>##

Main>
Main> nfs    # user enters the nfs menu
Main/NFS>    # new prompt