OptionsOn nl itself
-b
Specify the logical page body lines to be numbered <type>
-d
Specify the delimiter characters used to indicate the
start of a logical page section in the input file. At most two
characters may be specified; if only one character is specified,
the first character is replaced and the second character remains unchanged <delim>
-f
Specify the same as -b type except for logical page footer lines <type>
-h
Specify the same as -b type except for logical page header lines <type>
-i
Specify the increment value used to number logical page lines <incr>
-l
If numbering of all lines is specified for the current
logical section using the corresponding -b a, -f a or -h a option, specify
the number of adjacent blank lines to be considered as one. For example,
-l 2 results in only the second adjacent blank line being numbered <num>
-n
Specify the line numbering output format <format>
-p
Specify that line numbering should not be restarted at logical page delimiters
-s
Specify the characters used in separating the line
number and the corresponding text line. The default
sep setting is a single tab character <sep>
-v
Specify the initial value used to number logical page lines; see also the description of the -p option <startnum>
-w
Specify the number of characters to be occupied by the
line number; in case the width is insufficient to hold the line number,
it will be truncated to its width least significant digits <width>
