diff --git a/chapter1/1.3Spark完全分布式环境搭建.md b/chapter1/1.3Spark完全分布式环境搭建.md
index f917ab2..3b08383 100644
--- a/chapter1/1.3Spark完全分布式环境搭建.md
+++ b/chapter1/1.3Spark完全分布式环境搭建.md
@@ -131,7 +131,7 @@ AuthorizedKeysFile .ssh/authorized_keys # 公钥文件路径（和上面生成
 生成从机的公钥
 
 ```
-四台机器上都执行
+三台机器上都执行
 ssh-keygen -t rsa -P ""
 slave1上执行
 scp ~/.ssh/id_rsa.pub 192.168.20.100:~/.ssh/id_rsa.pub.s1