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SYSTEM-WIDE DEVICE CACHE PATH
The local system administrator may choose to have a system-wide
device cache file when building lsof. That file will generally
be constructed by a special system administration procedure when
the system is booted or when the contents of /dev or /devices)
changes. If defined, it is lsof's third device cache file path
choice.
You can tell that a system-wide device cache file is in effect
for your local installation by examining the lsof help option
output - i.e., the output from the -h or -? option.
Lsof will never write to the system-wide device cache file path
by default. It must be explicitly named with a -D function in a
root-owned procedure. Once the file has been written, the
procedure must change its permission modes to 0644 (owner-read
and owner-write, group-read, and other-read).
