diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,11 +1,11 @@
 # denyhosts
-ssh防止暴力破解.  
-记录mail server的一些信息,攻击IP等.  
-- 适用Debian 8、9  
+ssh防止暴力破解,适用Debian 8、9  
 
 
 cd /root
 git clone https://github.com/niuyuling/denyhosts.git  
+cd denyhosts  
+make clean; make  
 chmod a+x /root/denyhosts/denyhosts.sh  
 crontab 定时任务,像这样.  
 0 22 * * * /root/denyhosts/denyhosts.sh