Hi, How I can change names of many files keeping the extension same. My files are like this 1105 A0176.osc 1105 A0177.osc 1105 A0178.osc 1105 A0179.osc 1105 A0180.osc I want to change them as A0176.osc A0177.osc A0178.osc A0179.osc A0180.osc I am using ubuntu linux. Thanks... RD Raja Dey, Ph.D. Research Associate Molecular and Computational Biology University of Southern California 1050 Childs Way, Los Angeles, CA 90089 --------------------------------- Chat on a cool, new interface. No download required. Click here.