how resize the filesystem to 15m?

From:	"cfs2" <cii633 at 21cn dot com>
To:	<m0n0wall at lists dot m0n0 dot ch>
Subject:	how resize the filesystem to 15m?
Date:	Thu, 25 Sep 2003 23:06:54 +0800

hello,
      I want to add some software to m0n0wall,the filesystem size is 5m,It is to small,I want to
resize the filesystem from 5m to 15m£¬but I dont know how to do?how resize the filesystem to 15m?
thanks