Find all real quadruples $(a,b,c,d)$ satisfying the system of equations
$$
\left\{ \begin{array}{ll}
ab+cd = 6 \\
ac + bd = 3 \\
ad + bc = 2 \\
a + b + c + d = 6.
\end{array} \right.	
$$
1. We start with the given system of equations:
   \[
   \left\{
   \begin{array}{ll}
   ab + cd = 6 \\
   ac + bd = 3 \\
   ad + bc = 2 \\
   a + b + c + d = 6
   \end{array}
   \right.
   \]

2. Adding the first two equations:
   \[
   ab + cd + ac + bd = 6 + 3 = 9
   \]
   This can be factored as:
   \[
   (a+d)(b+c) = 9
   \]

3. From the fourth equation, we know:
   \[
   a + b + c + d = 6
   \]
   Let \( x = a + d \) and \( y = b + c \). Then:
   \[
   x + y = 6
   \]
   and from the previous step:
   \[
   xy = 9
   \]

4. Solving the system \( x + y = 6 \) and \( xy = 9 \):
   \[
   t^2 - 6t + 9 = 0
   \]
   This is a quadratic equation, and solving it gives:
   \[
   (t-3)^2 = 0 \implies t = 3
   \]
   Therefore, \( x = 3 \) and \( y = 3 \), so:
   \[
   a + d = 3 \quad \text{and} \quad b + c = 3
   \]

5. Next, we consider the remaining equations. We have:
   \[
   ac + bd = 3
   \]
   and:
   \[
   ad + bc = 2
   \]

6. Let \( a + c = k_1 \) and \( a + b = k_2 \). Then:
   \[
   b + d = 6 - k_1 \quad \text{and} \quad c + d = 6 - k_2
   \]

7. We can express \( a \) and \( b \) in terms of \( k_1 \) and \( k_2 \):
   \[
   a = \frac{k_1 + k_2 - 3}{2}
   \]
   \[
   b = \frac{-k_1 + k_2 + 3}{2}
   \]

8. Similarly, we can express \( c \) and \( d \):
   \[
   c = \frac{k_1 - k_2 + 3}{2}
   \]
   \[
   d = \frac{-k_1 - k_2 + 9}{2}
   \]

9. We need to check the possible values for \( k_1 \) and \( k_2 \). Given \( a + c = k_1 \) and \( a + b = k_2 \), we have:
   \[
   k_1 = 2 \quad \text{or} \quad 4
   \]
   \[
   k_2 = 1 \quad \text{or} \quad 5
   \]

10. Substituting these values, we get the following quadruples:
    - For \( k_1 = 2 \) and \( k_2 = 1 \):
      \[
      a = \frac{2 + 1 - 3}{2} = 0, \quad b = \frac{-2 + 1 + 3}{2} = 1, \quad c = \frac{2 - 1 + 3}{2} = 2, \quad d = \frac{-2 - 1 + 9}{2} = 3
      \]
      Thus, \((a, b, c, d) = (0, 1, 2, 3)\).

    - For \( k_1 = 2 \) and \( k_2 = 5 \):
      \[
      a = \frac{2 + 5 - 3}{2} = 2, \quad b = \frac{-2 + 5 + 3}{2} = 3, \quad c = \frac{2 - 5 + 3}{2} = 0, \quad d = \frac{-2 - 5 + 9}{2} = 1
      \]
      Thus, \((a, b, c, d) = (2, 3, 0, 1)\).

    - For \( k_1 = 4 \) and \( k_2 = 1 \):
      \[
      a = \frac{4 + 1 - 3}{2} = 1, \quad b = \frac{-4 + 1 + 3}{2} = 0, \quad c = \frac{4 - 1 + 3}{2} = 3, \quad d = \frac{-4 - 1 + 9}{2} = 2
      \]
      Thus, \((a, b, c, d) = (1, 0, 3, 2)\).

    - For \( k_1 = 4 \) and \( k_2 = 5 \):
      \[
      a = \frac{4 + 5 - 3}{2} = 3, \quad b = \frac{-4 + 5 + 3}{2} = 2, \quad c = \frac{4 - 5 + 3}{2} = 1, \quad d = \frac{-4 - 5 + 9}{2} = 0
      \]
      Thus, \((a, b, c, d) = (3, 2, 1, 0)\).

11. We verify that all these solutions satisfy the original system of equations.

The final answer is \( \boxed{ (0, 1, 2, 3), (2, 3, 0, 1), (1, 0, 3, 2), (3, 2, 1, 0) } \).