After installing RH ES 3, I found I did not have the sar and iostat commands. I installed sysstat-5.0.5-5.rhel3 from the redhat network. This resolved this issue. I wonder how I can compare my list of rpms, obtained with rpm -q -a, with the list of RH ES 3 rpms so I can see if I am missing other desirable filesets. Thks in advance, John Yard UCLA