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Norndo not occur within an/address/it is because they are thesedcommands for appendNext input line to pattern space and overwrite pattern space with thenext input line, and so are not relevant to theNmatch.\nis appended to the current line, and precedes that pulled in. So:printf %s\\n 1 2 3 4 | sed 'N;N;N;l;dwill print:1\n2\n3\n4- all 4 lines are in pattern space, but only 3 delimiters are present - because the\newline occurs between input lines in pattern space.