Почему команды bash не срабатывают в cygwin mintty?

Здравствуйте, подскажите пожалуйста, как заставить работать mintty ?

Стандартный терминал cygwin работает отлично, все команды срабатывают. Однако, в mintty, к примеру, на команду ls вылетает ошибка:

bash: ls: command not found

Я попробовал следующее:

"Cygwin ls command not found"
If you are a linux enthusiast and really miss those greps and sed/awks on the windows box, you've probably installed cygwin. You tried running it either by double-clicking the cygwin icon on your desktop or the cygwin.bat file in your "C:\cygwin" directory and got the bash-3.X$ prompt. However, although the pwd or cd commands work, if you try ls, it says:"ls: command not found".

Here is what you need to do to fix it:

1. Right click on "My Computer" -> Properties -> Advanced -> Environment Variables

2. Add a new environment variable, called CYGWIN_HOME and set its value to C:\cygwin

3. Edit the PATH environment variable and add C:\cygwin\bin to it (usually separated by a ';').

4. Just click okay, exit any command prompts or bash shells (over cygwin) you may have open, and open it again - it'll work!

Note: this assumes that you have installed cygwin at C:\cygwin. If you've kept it someplace else, please modify the above accordingly.

однако это не помогло. Что ещё можно попробовать?