How to implement text with shell

[quartz]

I need to implement some text, date, into another text file. For instance, one line in line 7 another text, and second line to 12 line another text file?

Thanks in advance.

[r035198x]

I need to implement some text, date, into another text file. For instance, one line in line 7 another text, and second line to 12 line another text file?

Thanks in advance.

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