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nl: added read from stdout and number blank lines. (#1903)

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Jason Yu
2018-01-25 10:11:05 +00:00
committed by Starbeamrainbowlabs
parent 00bf27a43e
commit a8cc78e6b1
1 changed files with 9 additions and 1 deletions
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10
pages/linux/nl.md
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@@ -2,14 +2,22 @@
> A utility for numbering lines, either from a file, or from standard input. > A utility for numbering lines, either from a file, or from standard input.
- Number lines in a file: - Number non-blank lines in a file:
`nl {{file}}` `nl {{file}}`
- Read from standard output:
`cat {{file}} | nl {{options}} -`
- Number only the lines with printable text: - Number only the lines with printable text:
`nl -t {{file}}` `nl -t {{file}}`
- Number all lines including blank lines:
`nl -b a {{file}}`
- Number only the body lines that match a basic regular expression (BRE) pattern: - Number only the body lines that match a basic regular expression (BRE) pattern:
`nl -b p'FooBar[0-9]' {{file}}` `nl -b p'FooBar[0-9]' {{file}}`