diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..4c31b56
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2016 Abdullah Almsaeed
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/lemp.sh b/lemp.sh
index 86585dc..71af006 100644
--- a/lemp.sh
+++ b/lemp.sh
@@ -3,7 +3,7 @@
 # Install script for LEMP Web Server on CentOS 6 by xiaosong
 
 # Checking
-
+echo "Checking..."
 if [ -n "`grep 'Aliyun Linux release' /etc/issue`" -o -e /etc/redhat-release ];then
     OS=CentOS
     [ -n "`grep ' 7\.' /etc/redhat-release`" ] && CentOS_RHEL_version=7
diff --git a/readme.md b/readme.md
index 7c9a2e6..e40700e 100644
--- a/readme.md
+++ b/readme.md
@@ -1,3 +1,5 @@
 # lemp-yum
 
 ## yum 版 lemp 套装安装脚本 for CentOS 6/7
+
+**未经测试，谨慎使用**