The man-pages-it has following copyright (POSIX-COPYRIGHT):
The Institute of Electrical and Electronics Engineers (IEEE) and
The Open Group, have given us permission to reprint portions of
In the following statement, the phrase ``this text'' refers to
portions of the system documentation.
Portions of this text are reprinted and reproduced in electronic form
in the linux-manpages package, from IEEE Std 1003.1 (TM), 2003 Edition,
Standard for Information Technology -- Portable Operating System
Interface (POSIX (R)), The Open Group Base Specifications Issue 6,
Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy
between these versions and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee
document. The original Standard can be obtained online at
This notice shall appear on any product containing this material.
Redistribution of this material is permitted so long as this notice and
the corresponding notices within each POSIX manual page are retained on
any distribution, and the nroff source is included. Modifications to
the text are permitted so long as any conflicts with the standard
are clearly marked as such in the text.
Shall we consider this licence free?
Di ng-Yi Chen