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In a set if you have the option to change directly in the file instead of printing the change output

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to screen.

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But firstly print the content of our file.

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Table that text because we will change input file directly to that copy table text 2 tables do dot text.

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Now if you would like to print only a line containing button.

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Peter the values set with option an s an address we would use a regular expression for searching string.

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Peter.

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And as a command we would use be a sprint input file would be table to text and under option I.

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After optional M and push and then we don't see any output.

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This is because we are placing output of said command directly to input file and not to the screen.

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If the open input file table to the text if you see only a line with Peter Gade now remove table to

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file and create it again by copying original file table that text we can check output of table to the

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text.

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Let's say we want to change input file by appending line after line with the bottom.

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Peter

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so bright said

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use I as an option will be directly changing input file as an address.

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Use Peter that Aguara expression for searching pattern Peter.

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And as Kamandi was a B option after Peter input file of be table to the text and we see here that we

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have no output printed to the screen.

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So let's check content of table to file and we see here new line after line with beat a pattern great

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using option I is very powerful.

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So be aware that you are affecting the input file.