To run maple in command line mode, simply enter
    maple
at the shell prompt of an IRES session. You can then enter Maple commands, using the quit command to end the session. For example:

$ maple
    |\^/|     Maple 10 (SUN SPARC SOLARIS)
._|\|   |/|_. Copyright (c) Maplesoft, a division of Waterloo Maple Inc. 2005
 \  MAPLE  /  All rights reserved. Maple is a trademark of
 <____ ____>  Waterloo Maple Inc.
      |       Type ? for help.
> ifactor(1000);
                                      3     3
                                   (2)   (5)
> p := x^2 - 1;
                                        2
                                  p := x  - 1
> factor(p);
                                (x - 1) (x + 1)
> quit
bytes used=371400, alloc=393144, time=0.07
$