':return: This method returns a list of commands to try to execute in
order to print the content of a known file.'

def _get_echo_commands(self):

    commands = []
    for special_char in self._special_chars:
        cmd_string = (special_char + '/bin/cat    /etc/passwd')
        commands.append(Command(cmd_string, 'unix', special_char))
        cmd_string = (special_char + 'type    %SYSTEMROOT%\\win.ini')
        commands.append(Command(cmd_string, 'windows', special_char))
    commands.append(Command('`/bin/cat    /etc/passwd`', 'unix', '`'))
    commands.append(Command('run    type    %SYSTEMROOT%\\win.ini', 'windows', 'run'))
    target_os = cf.cf.get('target_os').lower()
    commands = [c for c in commands if (target_os in (c.get_OS(), 'unknown'))]
    return commands
