I have REDHAT 7.3 system. Recently UPGRADED to REDHAT9. After upgrade REDHAT9 is not allowing to login. Unable to login as ROOT or any other user. I don't have any option here.. otherthan Reboot & Shutdown.
Booted system in Single and Emergency mode.
In single mode changed the root password and tryed to login as root by using LOGIN command It's giving following error
login(pam_unix)[262[:session opened for user root by (uid=0)
am_krb5:Configuration file does not specify default realm building user principal for 'root'
I tryed to login as guest user. Getting same above error.
In Emergecny mode it accepts ROOT passwd . But same password is not accepting in normal boot.
It's not givning any errors like Invalid password or any other password. After entering user name ROOT and password , the screen again comes back to Login Prompt with no errors. In case if i type wrong pasword then it's giving error " invalid password , Login incorrect " messages.
I found one solution on Redhat Support . As per that i removed .LOCK files from /etc. Still same problem
Anyone can help me pls.