From a8cc78e6b1fd4fda40d0d26129f5cbf56c0eb0d4 Mon Sep 17 00:00:00 2001
From: Jason Yu <ycm.jason@gmail.com>
Date: Thu, 25 Jan 2018 10:11:05 +0000
Subject: [PATCH] nl: added read from stdout and number blank lines. (#1903)

---
 pages/linux/nl.md | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/pages/linux/nl.md b/pages/linux/nl.md
index bdea5a255c..761ffc1f06 100644
--- a/pages/linux/nl.md
+++ b/pages/linux/nl.md
@@ -2,14 +2,22 @@
 
 > 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}}`
 
+- Read from standard output:
+
+`cat {{file}} | nl {{options}} -`
+
 - Number only the lines with printable text:
 
 `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:
 
 `nl -b p'FooBar[0-9]' {{file}}`