Unable to log into RStudio Server Pro IDE after installation

I installed RStudio Server Pro server on Red Hat Enterprise Linux Server release 7.5 (Maipo). However after installing the RSP, I am unable to log into IDE. I tried copying /etc/pam.d/login to /etc/pam.d/rstudio however, still can't log in.
What else can I check to resolve this login issue?
Thanks in advance.

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Sorry about this!
What happens when you log in?

It sounds like you've successfully followed these steps: http://docs.rstudio.com/ide/server-pro/index.html#redhat-centos-6

That is correct. I used the instructions in RSP admin guide.
It just gives error message "Error: Incorrect or invalid username/password"

Interesting. That sounds like your password validation is failing. Does your user have a password defined? You can check this with passwd at the command line. The other thing you might check is the UID / GID of your user (with id). I believe by default, RSP requires UID to be greater than 1000?

Some other things to check are whether your user has a home directory that is owned / readable / writable by the user. That would not be throwing an invalid user / pass error, though.

Another route you might take is to use the pamtester utility that comes bundled with RSP to ensure that the PAM authentication is happening appropriately.

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