Encrypting textfiles from shell

[herbert langhans <herbert.raimund%langhans.com.pl@localhost>]

Hi List,
actually a simple task - I would like to pass a textfile (with a
password as option) through some unix-binary just to save it encrypted
on the harddisk. Its intended for a password-list what I carry around on
my laptop. 

Is there any simple tool to recommend? Should be no GUI like tkpasman. 
Thanks
herb langhans