/usr/bin/my_print_defaults

/usr/bin/my_print_defaults  Ver 1.8 for Linux at x86_64
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL license

Displays the options from option groups of option files, which is useful to see which options a particular tool will use
Usage: /usr/bin/my_print_defaults [OPTIONS] [groups]
  -#, --debug[=#]     This is a non-debug version. Catch this and exit
  -c, --defaults-file=name
                      Read this file only, do not read global or per-user
                      config files; should be the first option
  -e, --defaults-extra-file=name
                      Read this file after the global config file and before
                      the config file in the users home directory; should be
                      the first option
  -g, --defaults-group-suffix=name
                      In addition to the given groups, read also groups with
                      this suffix
  --mysqld            Read the same set of groups that the mariadbd (previously
                      known as mysqld) binary does.
  --mariadbd          Read the same set of groups that the mariadbd binary
                      does.
  -n, --no-defaults   Return an empty string (useful for scripts).
  -?, --help          Display this help message and exit.
  -v, --verbose       Increase the output level
  -V, --version       Output version information and exit.

Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf ~/.my.cnf

Variables (--variable-name=value)
and boolean options {FALSE|TRUE}  Value (after reading options)
--------------------------------- ----------------------------------------
defaults-file                     my
defaults-extra-file               (No default value)
defaults-group-suffix             (No default value)
mysqld                            FALSE
mariadbd                          FALSE

Example usage:
/usr/bin/my_print_defaults --defaults-file=example.cnf client client-server mysql