D (Delete)
Deletes one or more lines of data.
D
Deletes the line on which the command is entered.
Dn
Deletes the block of lines delimited by the line on which the command is entered, inclusively. The n represents the number of lines to be deleted. For example, D10 deletes ten lines. A valid entry is from 1 to 99999.
DD
Deletes the block of lines delimited by the two lines on which the command is entered, inclusively.
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