diff --git a/00base/07env-install-centos.sh b/00base/07env-install-centos.sh
index a3e1874..5e7d959 100644
--- a/00base/07env-install-centos.sh
+++ b/00base/07env-install-centos.sh
@@ -230,7 +230,8 @@ function init:add_user() {
   local host="127.0.0.1"
   local add_sudoers="${ADD_USER_NAME}    ALL=(ALL)       NOPASSWD:ALL"
   command::exec "${host}" "
-  if [ \`id -u ${ADD_USER_NAME} >/dev/null 2>&1\` -ne '0' ]; then
+  id -u ${ADD_USER_NAME} >/dev/null 2>&1
+  if [ \$? -ne 0 ]; then
     # 创建用户
     adduser ${ADD_USER_NAME}
     # 设置密码