grant
show grants for "username"@"host"
flush privileges;
用mysqldump工具导出表数据
mysqldump -uiboxpaynew -p -h172.16.1.86 -t --compact iboxpay sp_posts >/tmp/sp_posts.sql
//-u用户，-p密码，-h主机，-t表数据，--compact去掉注释，iboxpay数据库，sp_posts表，-d表结构
备库同步
mysql -e "show databases;" -uroot -p'password' | grep -Ev "Database|information_schema|mysql|sys|performance_schema|test"| xargs mysqldump -uroot -p'password' --databases -R> /tmp/aaa.sql