I was able to newly install R and Rstudio-server onto my Chromebook with Linux. When I attempted to login, I received "error: unauthorized user". I have Pamtester installed and attempted
$ pamtester -v auth authenticate
the output was
pamtester: invoking pam_start(auth, , ...)
pamtester: performing operation - authenticate
pamtester: authentication failure
I used the only possible usernames and passwords it could be so I know that I have to be using the correct information. I am new to all of this and have no earthly idea what the problem could be.