diff --git a/README.md b/README.md
index 2d8f309..eeb06a6 100644
--- a/README.md
+++ b/README.md
@@ -577,6 +577,10 @@ firefox-esr-l10n-zh-cn libreoffice-l10n-zh-cn -y
 执行以下命令，然后重启后生效
 
 ```shell
+切换至root用户身份
+sudo -i
+
+然后执行
 cat << EOF >/etc/default/locale
 #  File generated by update-locale
 LANGUAGE="zh_CN:zh:en_US:en"