fix bug

utils/init.sh

@@ -7,7 +7,7 @@ if [ -n "`grep 'Aliyun Linux release' /etc/issue`" -o -e /etc/redhat-release ];t
     [ -n "`grep ' 7\.' /etc/redhat-release`" ] && CentOS_RHEL_version=7
 fi
 
-if [ "$OS" != 'CentOS' ] || [ "$CentOS_RHEL_version" != '7' ];then
+if [ $OS != 'CentOS' ] || [ $CentOS_RHEL_version != '7' ];then
     echo "${CFAILURE}Error: This script only support CentOS 7${CEND}";
     kill -9 $$
 fi
@@ -71,4 +71,4 @@ sudo /sbin/iptables -I INPUT -p tcp --dport 22 -j ACCEPT
 sudo /sbin/service iptables save
 
 sudo systemctl restart iptables
-sudo systemctl enable iptables.service
+sudo systemctl enable iptables.service