If you forgot your username and password for linksys router, then there will be a another option on the bottom of your linksys router login page i.e. "for local access, click here"
> when you click on that option it will ask for router access password
and default password is admin
>if default password doesn't work ,then type the one which you created whenever you configured your router.
> if you don't remember that either then there is only option which is reset
> so you have to reset your router and reconfigure it again
and if you want to know that how you can reset a router then please check our queries section.