lsof - A utility which lists open files on a Linux/UNIX system. Full Name: lsof-4.47-2.i386.rpm Source RPM: lsof-4.47-2.src.rpm Version: 4.47 Release 2 Group: Development/Debuggers License: Free Vendor: Red Hat, Inc. Size: 528 KB Description Lsof stands for LiSt Open Files, and it does just that: it lists information about files that are open by the processes running on a UNIX system.