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24 lines
541 B
Markdown
24 lines
541 B
Markdown
# nl
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> A utility for numbering lines, either from a file, or from standard input.
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> More information: <https://www.gnu.org/software/coreutils/manual/html_node/nl-invocation.html>.
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- Number non-blank lines in a file:
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`nl {{file}}`
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- Read from standard output:
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`cat {{file}} | nl {{options}} -`
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- Number only the lines with printable text:
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`nl -t {{file}}`
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- Number all lines including blank lines:
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`nl -b a {{file}}`
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- Number only the body lines that match a basic regular expression (BRE) pattern:
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`nl -b p'FooBar[0-9]' {{file}}`
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