Which of the following is not a communication command.



      

    

    

      
            unix

    

    

      
    
            
  1. 
              
    write
    

            
    2. 
            
  2. 
              
    mesg
    

            
    3. 
            
  3. 
              
    mail
    

            
    4. 
            
  4. 
              
    grep
    

            
    5. 
      

    

    

    

      

         Show answer
      

      


      

    


    


      

        Correct Option: D
      

    

  



  

  

    

  

  

    

      
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