mysql_upgrade — Check and Upgrade MySQL Tables • --defaults-file= file_name Use only the given option file. If the file does not exist or is otherwise inaccessible, an error occurs. If file_name  is not an absolute path name, it is interpreted relative to the current directory. For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling” . Read not only the usual option groups, but also groups with the usual names and a suffix of  str . For example,  mysql_upgrade  normally reads the  [client]  and  [mysql_upgrade]  groups. If this option is given as  --defaults-group-suffix=_other ,  mysql_upgrade  also reads the [client_other]  and  [mysql_upgrade_other]  groups. For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling” . Ignore the  mysql_upgrade_info  file and force execution even if  mysql_upgrade  has already been executed for the current version of MySQL. Request from the server the public key required for RSA key pair-based password exchange. This option applies to clients that authenticate with the  caching_sha2_password  authentication plugin. For that plugin, the server does not send the public key unless requested. This option is ignored for accounts that do not authenticate with that plugin. It is also ignored if RSA-based password exchange is not used, as is the case when the client connects to the server using a secure connection. If  --server-public-key-path= file_name  is given and specifies a valid public key file, it takes precedence over  --get-server-public-key . For information about the  caching_sha2_password  plugin, see Section 6.4.1.2, “Caching SHA-2 Pluggable Authentication” . Connect to the MySQL server on the given host. Read options from the named login path in the  .mylogin.cnf  login path file. A “login path”  is an option group containing options that specify which MySQL server to connect to and which account to authenticate as. To create or modify a login path file, use the  mysql_config_editor  utility. See Section 4.6.7, “mysql_config_editor — MySQL Configuration Utility” . For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling” . The maximum size of the buffer for client/server communication. The default value is 24MB. The minimum and maximum values are 4KB and 2GB. 410 • --max-allowed-packet= value • --login-path= name • --host= host_name ,  -h  host_name • --get-server-public-key • --force • --defaults-group-suffix= str