The error message “/usr/libexec/mysqld: Incorrect key file for table ‘./DBNAME/TABLE_NAME.MYI’; try to repair it” is a common issue encountered when using the MySQL database system. It typically occurs when there is a problem with the indexes in a table, causing the MySQL server to be unable to access the data in the table.
The error message suggests that you try to repair the table using the mysqlcheck command. Here’s an example of how to repair a table named TABLE_NAME in a database named DBNAME:
mysqlcheck -u root -p --repair DBNAME TABLE_NAME
Where root is the MySQL user account with administrative privileges, and -p prompts you for the password for that account.
If the repair process is successful, the error message should go away and the table should be accessible again.
If the repair process fails, you may need to try an alternative approach, such as restoring a backup of the table or using the mysqlhotcopy command to backup and restore the table. You may also need to consult the MySQL manual or seek assistance from a MySQL expert for further assistance.
Note that it’s always a good idea to backup your MySQL databases regularly to prevent data loss in case of issues like this.