how can I clean up the no-useful file in rootvg?

From: andrewqiu (andrewqiu_at_163.com)
Date: 08/29/03 

Date: 29 Aug 2003 02:13:01 -0700

I have only one disk for rootvg,so can anyone give me some advises to
free more space for system use----decrease the size of the common use
file,like /tmp/hacmp.out?

thanks a lot.