背景：

导出数据库test库的test表数据出现报错信息：mysqldump: [ERROR] unknown variable 'database=test'.

原来是my.cnf参数文件配置了以下内容：

[client]

user=test

port=3306

database=test

将database参数注释掉，就不再出现报错。

[root@node01 tmp]# mysqldump -utest -pmysql test test > /tmp/ttt.sql

mysqldump: [Warning] Using a password on the command line interface can be insecure.

Warning: A partial dump from a server that has GTIDs will by default include the GTIDs of all transactions, even those that changed suppressed parts of the database. If you don't want to restore GTIDs, pass --set-gtid-purged=OFF. To make a complete dump, pass --all-databases --triggers --routines --events.