Lsof

lsof is a command found in almost any Unix system that reports open files by processes of a Operating System. It works in and supports several UNIX flavors.

One use for this command is when a disk cannot be unmounted because (unspecified) files are in use. The listing of open files can be consulted (suitably filtered if necessary) to identify the process that is using the files.

A man page for the command can be found at [http://www.netadmintools.com/html/lsof.man.html lsof manpage at www.netadmintools.com]