diff --git a/lemp.sh b/lemp.sh
index a475c81..a7c948c 100755
--- a/lemp.sh
+++ b/lemp.sh
@@ -5,6 +5,18 @@
 SCRIPT_ROOT=`pwd`
 cd $SCRIPT_ROOT
 
+# 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
+fi
+
+if [ $OS != 'CentOS' ] || [ $CentOS_RHEL_version != '7' ];then
+    echo "${CFAILURE}Error: This script only support CentOS 7${CEND}";
+    kill -9 $$
+fi
+
 while :; do echo
   read -p "Do you want to init your CentOS? [y/n]:(Default y press Enter) " init_yn
   [ -z "$init_yn" ] && init_yn=y
@@ -46,11 +58,12 @@ while :; do echo
             read -p "Please type MariaDB root password:(Default lemp.sh press Enter) " MariaDB_ROOT_PWD
             [ -z "$MariaDB_ROOT_PWD" ] && MariaDB_ROOT_PWD="lemp.sh"
             [ -n "`echo $MariaDB_ROOT_PWD | grep '[+|&]'`" ] && { echo "${CWARNING}input error,not contain a plus sign (+) and & ${CEND}"; continue; }
-            break;
+            break
         done
     else
         break
     fi
+    break
   fi
 done
 
@@ -61,7 +74,7 @@ fi
 # Install base packages
 echo "Installing base packages..."
 sudo yum -y update
-sudo yum -y install vim wget epel-release unzip git
+sudo yum -y install sudo vim wget epel-release unzip git
 
 if [ "$nginx_yn" == 'y' ]; then
 . ./utils/nginx.sh
diff --git a/utils/init.sh b/utils/init.sh
index a9c68fc..aa7daff 100644
--- a/utils/init.sh
+++ b/utils/init.sh
@@ -1,16 +1,4 @@
 #!/bin/bash
- 
-# 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
-fi
-
-if [ $OS != 'CentOS' ] || [ $CentOS_RHEL_version != '7' ];then
-    echo "${CFAILURE}Error: This script only support CentOS 7${CEND}";
-    kill -9 $$
-fi
 
 # Close SELINUX
 setenforce 0