+For 'root' user (ALL privileges, DB admin), paste command with new password:
+ALTER USER 'root'@'localhost' IDENTIFIED BY 'newpassword';
+FLUSH PRIVILEGES;
+
+For 'mysql_sysadmin' (RELOAD and SHUTDOWN privileges):
+CREATE USER 'mysql_sysadmin'@'localhost' IDENTIFIED BY 'sysnewpassword' PASSWORD EXPIRE NEVER;
+GRANT RELOAD, SHUTDOWN ON *.* TO 'mysql_sysadmin'@'localhost';
+FLUSH PRIVILEGES;
+
+
+Both into command:
+$ mysql -u root -p --ssl-mode=disabled -S $MYSQL_SOCKET
+
+NOTE 1:
+CURRENT TEMPORARY ROOT PASSWORD CAN BE FOUND IN LOG
+(grep for "A temporary password is generated" string):
+$MYSQL_ERRLOG
+
+
+NOTE 2:
+mysql_sysadmin password should be placed to $MYSQL_CONFIG in