making a little script shell

["koffi BADOHOUN" <koff10 hotmail com>]

Hello everybody,
I'm try to build  a linux script  named  " search " . This script   must 
locate the path where is  the first argument .   For example  when typing " 
search  ls " , I must get where is the executable for ls  command . that is 
to say : " ls "  is  " /bin/ls " .
I must also have , "   ls is hashed (/bin/ls)"   when typing this command  
:" type ls "
please help .

koffi.

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