diff --git a/xCAT-server/share/xcat/install/scripts/post.rhels8 b/xCAT-server/share/xcat/install/scripts/post.rhels8
index d875efbaa..cdc119e25 100644
--- a/xCAT-server/share/xcat/install/scripts/post.rhels8
+++ b/xCAT-server/share/xcat/install/scripts/post.rhels8
@@ -18,3 +18,6 @@ do
         sed -i 's/ONBOOT=no/ONBOOT=yes/' "$i"
     fi
 done
+
+# Dirty hack for RHEL8 Alpha
+chkconfig network on
diff --git a/xCAT-server/share/xcat/install/scripts/post.xcat.ng b/xCAT-server/share/xcat/install/scripts/post.xcat.ng
index 83deac2fc..07c4e64bd 100644
--- a/xCAT-server/share/xcat/install/scripts/post.xcat.ng
+++ b/xCAT-server/share/xcat/install/scripts/post.xcat.ng
@@ -58,7 +58,7 @@ sleep "$RAND"
 if ! type openssl >/dev/null 2>&1
 then
     msgutil_r "$MASTER_IP" "error" "/usr/bin/openssl does not exist, halt ..." "/var/log/xcat/xcat.log" "$log_label"
-    /tmp/updateflag $MASTER $XCATIPORT "installstatus failed"
+    /tmp/updateflag "$MASTER" "$XCATIPORT" "installstatus failed"
     sleep infinity
 fi
 
@@ -119,11 +119,11 @@ function download_recursive()
             [ "$?" -ne "0" ] && return 1
             ;;
         *)
-            curl --retry 20 --max-time 60 "${url}/${f}" -o "${dest_dir}/${f}"
+            curl --fail --retry 20 --max-time 60 "${url}/${f}" -o "${dest_dir}/${f}"
             [ "$?" -ne "0" ] && return 1
             ;;
         esac
-    done < <(curl --retry 20 --max-time 60 "${url}/" | grep -o '<a href="\([^"]*\)">\1</a>' | cut -d '"' -f 2)
+    done < <(curl --fail --retry 20 --max-time 60 "${url}/" | grep -o '<a href="\([^"]*\)">\1</a>' | cut -d '"' -f 2)
     return 0
 }
 
@@ -143,7 +143,7 @@ export NODE="#TABLE:nodelist:THISNODE:node#"
 
 msgutil_r "$MASTER_IP" "info" "trying to get mypostscript from $MASTER_IP..." "/var/log/xcat/xcat.log" "$log_label"
 
-curl --retry 20 --max-time 60 "http://$MASTER_IP$TFTPDIR/mypostscripts/mypostscript.$NODE" -o "/xcatpost/mypostscript.$NODE" 2> /tmp/download.log
+curl --fail --retry 20 --max-time 60 "http://$MASTER_IP$TFTPDIR/mypostscripts/mypostscript.$NODE" -o "/xcatpost/mypostscript.$NODE" 2> /tmp/download.log
 if [ "$?" = "0" ]
 then
     case "$XCATDEBUGMODE" in