diff --git a/deploy/install.sh b/deploy/install.sh
index b68c690653..25592b37c5 100755
--- a/deploy/install.sh
+++ b/deploy/install.sh
@@ -14,7 +14,7 @@ check_ports_occupied() {
             sudo netstat -anp tcp
         else
             sudo netstat -tupln tcp
-        fi | awk '$6 == "LISTEN" && $4 ~ /^.*[.:](80|443)$/' | wc -l | bc
+        fi | awk '$6 == "LISTEN" && $4 ~ /^.*[.:](80|443)$/' | wc -l | grep -o '[[:digit:]]\+'
     )"
 }
 
@@ -82,11 +82,11 @@ check_os() {
             package_manager="apt-get"
             ;;
         \"Red\ Hat*\")
-            desired_os=1
+            desired_os=0
             package_manager="yum"
             ;;
         \"CentOS*\")
-            desired_os=1
+            desired_os=0
             package_manager="yum"
             ;;
         *)          desired_os=0