45 lines
754 B
Groff
45 lines
754 B
Groff
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.TH NL 1 sbase\-VERSION
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.SH NAME
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nl \- number lines
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.SH SYNOPSIS
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.B nl
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.RB [ \-b
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.IR mode ]
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.RB [ \-i
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.IR increment ]
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.RB [ \-s
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.IR separator ]
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.RI [ file ...]
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.SH DESCRIPTION
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.B nl
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reads each file in sequence and writes it to stdout with non-empty lines
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numbered. If no file is given, nl reads from stdin.
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.SH OPTIONS
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.TP
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.BI \-b " mode"
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defines which lines will be numbered:
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.RS
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.TP
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.B a
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all lines.
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.TP
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.B n
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no lines.
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.TP
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.BI p pattern
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only lines which match
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.IR pattern ,
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a regular expression as defined in
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.IR regex (7).
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.TP
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.B t
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only non-empty lines (default).
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.RE
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.TP
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.BI \-i " increment"
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defines the increment between numbered lines.
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.TP
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.BI \-s " separator"
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defines the string used to separate line numbers and lines. By default this is
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a tab.
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