title: awk, print all columns and add new column with substr
body: <p>I have this table</p>
  
  <pre><code>USI,Name,2D-3D
  RO0001,Patate,2D
  RO0002,Haricot,3D
  RO0003,Banane,2D
  RO0004,Pomme,2D
  RO0005,Poire,2D
  </code></pre>
  
  <p>and I want this </p>
  
  <pre><code>USI,Name,2D-3D
  RO0001,Patate,2D,RO_2D_Patate
  RO0002,Haricot,3D,RO_3D_Haricot
  RO0003,Banane,2D,RO_2D_Banane
  RO0004,Pomme,2D,RO_2D_Pomme
  RO0005,Poire,2D,RO_2D_Poire
  </code></pre>
  
  <p>I manage to obtain the construction "RO_2D_Patate" with awk</p>
  
  <pre><code>awk -F "," '{print substr($1,1,2)"_"substr($3,1,2)"_"$2}' Test4.txt
  </code></pre>
  
  <p>But I want to print all my column $0 before as my second table.</p>
  
  <p>I tried everything But I am still a novice !!!!</p>
  
  <p>Any idea over there?</p>