i found this, but i need some clarification

https://www.drupal.org/forum/support/post-installation/2013-01-10/undefi...

so are they saying to log in to my linux/MySql server, find the user table for the site i'm trying to remove these pesky errors on, and manually ADD an additional user 0? or maybe to add a generic user through config, and THEN go to linux/MySql servers, find the database table and switch that users # to 0?   

we are hosting locally on linux servers btw, so i'm not sure php my admin is applicable?

thank you