From 42df40711397e357550eb0bd5af21fc7534d75ca Mon Sep 17 00:00:00 2001
From: onceupon <nim.1111.ou@gmail.com>
Date: Wed, 1 Nov 2017 17:59:03 +0800
Subject: [PATCH] add grep only integers

---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index c086224..0466e3a 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,13 @@ http://onceupon.github.io/Bash-Oneliner/
 grep -o -P '(?<=w1).*(?=w2)'
 ```
 
+#####  Grep only integer
+    
+```bash
+grep -o '[0-9]*'
+```
+
+
 ##### Grep lines without word (e.g. bbo)
      
 ```bash