Try executing as below 

perl -i.bak -ne"print if "\$f" ||= /1\.0/" file

[download]

In unix the shell interprets the $f. So you were unable to execute.

--Lakshmanan G.

The great pleasure in my life is doing what people say you cannot do.

In reply to Re^3: Delete strings by lakshmananindia
in thread Delete strings by sandy1028

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