1. Check the error log for the MySQL 1013 error:
$ tail -f /var/log/mysql/error.log
2. Check the MySQL configuration file for any misconfigurations:
$ cat /etc/mysql/my.cnf
3. Check the MySQL process list for any suspicious activity:
$ mysqladmin -u root -p processlist
4. Check the MySQL user table for any suspicious users:
$ mysql -u root -p -e "SELECT * FROM mysql.user;"
5. Check the MySQL grants table for any suspicious grants:
$ mysql -u root -p -e "SELECT * FROM mysql.grants;"
6. Check the MySQL tables for any suspicious data:
$ mysql -u root -p -e "SELECT * FROM mysql.tables;"
7. Check the MySQL privileges table for any suspicious privileges:
$ mysql -u root -p -e "SELECT * FROM mysql.privileges;"
8. Check the MySQL triggers table for any suspicious triggers:
$ mysql -u root -p -e "SELECT * FROM mysql.triggers;"
9. Check the MySQL views table for any suspicious views:
$ mysql -u root -p -e "SELECT * FROM mysql.views;"
10. Check the MySQL stored procedures table for any suspicious stored procedures:
$ mysql -u root -p -e "SELECT * FROM mysql.procedures;"
11. Check the MySQL functions table for any suspicious functions:
$ mysql -u root -p -e "SELECT * FROM mysql.functions;"
12. Once all the above steps have been completed, it is recommended to use an automated database observability tool to monitor and fix the MySQL 1013 in question. This tool can provide real-time insights into the performance and health of the database, as well as alerting when any issues arise. It can also provide detailed analysis of the root cause of any issues, allowing for quick and efficient resolution.