pty.openpty() Open a new pseudo-terminal pair, using

crypt.methods A list of available password hashing algorithms, as crypt.METHOD_* objects. This list is sorted from

grp.getgrall() Return a list of all available group entries, in arbitrary order.

tty.setraw(fd, when=termios.TCSAFLUSH) Change the mode of the file descriptor fd to raw. If when is omitted

resource.getrusage(who) This function returns an object that describes the resources consumed by either the current process

termios.tcsetattr(fd, when, attributes) Set the tty attributes for file descriptor fd from the attributes

syslog.closelog() Reset the syslog module values and call the system library closelog(). This

posix.environ A dictionary representing the string environment at the time the interpreter was started. Keys and values are

fcntl.fcntl(fd, cmd, arg=0) Perform the operation cmd on file descriptor fd (file objects providing a

crypt.crypt(word, salt=None) word will usually be a user’s password as typed at a prompt or in a graphical interface