EXHIBIT 99.1

CERTIFICATION

Each of the undersigned hereby certifies, in accordance with 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in his capacity as an officer of Legato Systems, Inc. (“Legato”), that the Annual Report of Legato Systems, Inc. on Form 10-K for the year ended December 31, 2002, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of Legato Systems, Inc.

By:	/s/    DAVID B. WRIGHT
	David B. Wright Chairman and Chief Executive Officer
By:	/s/    ANDREW J. BROWN
	Andrew J. Brown Executive Vice President and Chief Financial Officer

Date: February 28, 2003