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Forum: Shell Programming and Scripting 02-15-2007

difference between double inverted coma and single inverted comma

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difference between double inverted coma and single inverted comma

Whats the basic difference between double inverted comma and single inverted comma and no comma applied at all?

Eg1 if [ -f "$filename" ]

Eg2 if [ -f $filename ]

iEg3 f [ -f '$filename' ]

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