diff --git a/plugins/mysql-community/install.sh b/plugins/mysql-community/install.sh
index 35e594f48..7d8d80fd1 100755
--- a/plugins/mysql-community/install.sh
+++ b/plugins/mysql-community/install.sh
@@ -10,14 +10,15 @@ serverPath=$(dirname "$rootPath")
 # https://dev.mysql.com/downloads/mysql/
 # https://downloads.mysql.com/archives/community/
 
+# SHOW VARIABLES LIKE 'default_authentication_plugin';
 
 # /www/server/mysql-community/bin/mysqld --basedir=/www/server/mysql-community --datadir=/www/server/mysql-community/data --initialize-insecure --explicit_defaults_for_timestamp
 
 
-# cd /www/server/mdserver-web/plugins/mysql-community && bash install.sh install 8.0
-# cd /www/server/mdserver-web/plugins/mysql-community && bash install.sh uninstall 8.0
-# cd /www/server/mdserver-web && python3 /www/server/mdserver-web/plugins/mysql-community/index.py start 5.7
-# cd /www/server/mdserver-web && python3 /www/server/mdserver-web/plugins/mysql-community/index.py fix_db_access
+# cd /www/server/mdserver-web/plugins/mysql-community && bash install.sh install 9.0
+# cd /www/server/mdserver-web/plugins/mysql-community && bash install.sh uninstall 9.0
+# cd /www/server/mdserver-web && python3 plugins/mysql-community/index.py start 8.0
+# cd /www/server/mdserver-web && python3 plugins/mysql-community/index.py fix_db_access
 # cd /www/server/mdserver-web && source bin/activate && python3 plugins/mysql/index.py do_full_sync  {"db":"xxx","sign":"","begin":1}
 
 action=$1