Sybase Partners with IBM to Sell Database Software  NEW YORK (Reuters) - Sybase Inc. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=SY.N qtype=sym infotype=info qcat=news"&gt;SY.N&lt;/A&gt; said on Tuesday  that it will partner with hardware vendor IBM &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=IBM.N qtype=sym infotype=info qcat=news"&gt;IBM.N&lt;/A&gt; to market  its Linux database software, potentially dealing a blow to Sun  Microsystems, another long-standing partner.