mysql — The MySQL Command-Line Client This option is available only if MySQL was built using  WITH_DEBUG . MySQL release binaries provided by Oracle are  not  built using this option. Print some debugging information when the program exits. This option is available only if MySQL was built using  WITH_DEBUG . MySQL release binaries provided by Oracle are  not  built using this option. Print debugging information and memory and CPU usage statistics when the program exits. This option is available only if MySQL was built using  WITH_DEBUG . MySQL release binaries provided by Oracle are  not  built using this option. A hint about which client-side authentication plugin to use. See Section 6.2.17, “Pluggable Authentication” . Use  charset_name  as the default character set for the client and connection. This option can be useful if the operating system uses one character set and the  mysql  client by default uses another. In this case, output may be formatted incorrectly. You can usually fix such issues by using this option to force the client to use the system character set instead. For more information, see Section 10.4, “Connection Character Sets and Collations” , and Section 10.15, “Character Set Configuration” . Read this option file after the global option file but (on Unix) before the user 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” . 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. Exception: Even with  --defaults-file , client programs read  .mylogin.cnf . 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  normally reads the  [client]  and  [mysql]  groups. If this option is given as  -- 423 • --defaults-group-suffix= str • --defaults-file= file_name • --defaults-extra-file= file_name • --default-character-set= charset_name • --default-auth= plugin • --debug-info ,  -T • --debug-check