dfos = Data Flow Operations System, the common tool set for DFO . ... download: . reference.installation from www.eso.org/~qc/dfos/tools if DFOS . ... The tool is called once from the command line and creates the web page dfosExplorer.html under $DFO_MON_DIR. ... The tool scans all DFOS tools against a reference installation (see below), checks their version, provides links to update if a mismatch is found, links to the documentation pages, and offers editing of the associated configuration files. ...