From fa32bc4ad49e8ccd639a4e36e040ea658000260c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=AD=A6=E5=8D=9A=E6=96=87?= <879367232@qq.com>
Date: Sat, 7 Oct 2023 13:12:31 +0000
Subject: [PATCH] update README.md.
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Signed-off-by: 武博文 <879367232@qq.com>
---
 README.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index a3a136b..5f1767b 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,9 @@
 
 #### 使用说明
 
-1.  xxxx
+在最外层目录 catkin_make
+可能需要 source ./devel/setup.bash
+1.  roslaunch librviz_tutorial laser.launch 
 2.  xxxx
 3.  xxxx