Which of the following files will be moved to the remote servers?

A junior systems administrator has just generated public and private authentication keys for passwordless login.

Which of the following files will be moved to the remote servers?
A . id_dsa.pem
B . id_rsa
C . id_ecdsa
D . id_rsa.pub

View Answer

Answer: D

Explanation:

The file id_rsa.pub will be moved to the remote servers for passwordless login. The id_rsa.pub file is the public authentication key that is generated by the ssh-keygen command. The public key can be copied to the remote servers by using the ssh-copy-id command or manually. The remote servers will use the public key to authenticate the user who has the corresponding private key (id_rsa). This will allow the user to log in without entering a password. The other options are incorrect because they are either private keys (id_rsa, id_dsa.pem, or id_ecdsa) or non-existent files (id_dsa.pem or id_ecdsa).

References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 13: Managing Network Services, page 410.