.. _unix: ********************** Unix Specific Services ********************** The modules described in this chapter provide interfaces to features that are unique to the Unix operating system, or in some cases to some or many variants of it. Here's an overview: .. toctree:: posix.rst pwd.rst spwd.rst grp.rst crypt.rst dl.rst termios.rst tty.rst pty.rst fcntl.rst pipes.rst posixfile.rst resource.rst nis.rst syslog.rst commands.rst