An administrator tries to log m to a Linux host with the root account but receives the following error: permission denied. A colleague confirms the password being used is correct. Which of the…

ssh-copy-id is used to install public keys for key-based authentication; it is not required for password-based root login and would not produce a permission denied error.

LDAP connectivity issues affect domain/directory accounts, not the local root account which is authenticated locally via /etc/shadow.

Account lockout from failed attempts would typically produce a different error message such as 'account locked' and the colleague confirmed the password is correct implying no prior failures.

The /etc/ssh/sshd_config file controls SSH daemon behavior, and setting PermitRootLogin to 'no' explicitly blocks all SSH login attempts by the root user regardless of password validity. This is a common security hardening measure on Linux systems and directly explains receiving 'permission denied' despite using the correct credentials.

Removing the root account entirely would produce a different error indicating the user does not exist, not a generic permission denied message.