diff --git a/00base/07env-install-centos.sh b/00base/07env-install-centos.sh
index 5e7d959..cf3f929 100644
--- a/00base/07env-install-centos.sh
+++ b/00base/07env-install-centos.sh
@@ -237,7 +237,8 @@ function init:add_user() {
     # 设置密码
     echo ${ADD_USER_NAME}:${ADD_USER_PASSWORD} | chpasswd
   fi
-  if [ \`grep -c '$add_sudoers' '/etc/sudoers'\` -ne '0' ];then
+  grep -c '$add_sudoers' '/etc/sudoers'
+  if [ \$? -ne 0 ];then
     # 新增修改权限
     chmod -v u+w /etc/sudoers
     echo -e \"\n$add_sudoers\n\" >> /etc/sudoers