[ ! -z $4 ]

02-17-2009

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[ ! -z $4 ]

Hi ,

Code:

 
What is the significance of " $ " in [ ! -z $4 ] .

Kindly guide.

Regards

himvat

02-17-2009

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! = not
-z = true if empty
$4 = positional parameter number 4

zaxxon

Shell Programming and Scripting