# The root@localhost user account created by mysql_install_db is created with the 
# ability to use two authentication plugins. 
#
# First, it is configured to try to use the unix_socket authentication plugin. This 
# allows the root@localhost user to login without a password via the local Unix 
# socket file defined by the socket system variable, as long as the login is 
# attempted from a process owned by the operating system root user account. 
#
#   CREATE USER root@localhost IDENTIFIED VIA unix_socket OR mysql_native_password USING 'invalid'
#   CREATE USER mysql@localhost IDENTIFIED VIA unix_socket OR mysql_native_password USING 'invalid'
#

# We can do:
#
ALTER USER root@localhost IDENTIFIED VIA unix_socket OR mysql_native_password USING PASSWORD('$MYSQL_ROOT_PW'