code: def posix_rename(self, oldpath, newpath):
          
          oldpath = self._adjust_cwd(oldpath)
          newpath = self._adjust_cwd(newpath)
          self._log(DEBUG, "posix_rename({!r}, {!r})".format(oldpath, newpath))
          self._request(
              CMD_EXTENDED, "posix-rename@openssh.com", oldpath, newpath
          )
docs: Rename a file or folder from ``oldpath`` to ``newpath``, following
          posix conventions.
  
          :param str oldpath: existing name of the file or folder
          :param str newpath: new name for the file or folder, will be
              overwritten if it already exists
  
          :raises:
              ``IOError`` -- if ``newpath`` is a folder, posix-rename is not
              supported by the server or something else goes wrong
  
          :versionadded: 2.2