d427f333b2
* as suggested in #10428 * standard input => `stdin` * standard output => `stdout` * standard error => `stderr` Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
25 lines
534 B
Markdown
25 lines
534 B
Markdown
# nl
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> A utility for numbering lines, either from a file, or from `stdin`.
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> More information: <https://www.gnu.org/software/coreutils/nl>.
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- Number non-blank lines in a file:
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`nl {{path/to/file}}`
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- Read from `stdout`:
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`cat {{path/to/file}} | nl {{options}} -`
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- Number only the lines with printable text:
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`nl -t {{path/to/file}}`
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- Number all lines including blank lines:
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`nl -b a {{path/to/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]' {{path/to/file}}`
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