diff --git a/src/func/chroot b/src/func/chroot
old mode 100644
new mode 100755
index 720a5e8..26de25e
--- a/src/func/chroot
+++ b/src/func/chroot
@@ -1,3 +1,7 @@
+#!/bin/bash
+#remaster lib
+[ -d "<LIBDIR>" ] || { echo "LIBDIR not exist"; exit 1; }
+
 ## overload chroot with lxc
 function chroot() {
 	lxc-attach -n _remaster_ -- "$2" "$3" "$4" "$5" "$6" "$7"
@@ -21,3 +25,8 @@ function chroot_config() {
 	echo "lxc.network.flags = up"
 	echo "lxc.network.hwaddr = 00:16:3e:5a:ba:1e"
 }
+
+[ -n "$1" ] && {
+  echo param
+  $1
+}
diff --git a/src/remaster.sh b/src/remaster.sh
index 75b0ebb..8663194 100755
--- a/src/remaster.sh
+++ b/src/remaster.sh
@@ -566,6 +566,9 @@ function iso_create_desinfect2017() {
 
 ### chroot ###
 
+## overload chroot with lxc
+source <LIBDIR>/func/chroot
+
 #chroot_initial [chroot_dir]
 source <LIBDIR>/func/chroot_initial