Configure and Secure SSH

Question 1

What is ssh command used for?

Answer 1

Allows users to access remote systems securely with the SSH protocol.

Question 2

Where does a client system store the identities of remote servers?

Answer 2

In the ~/.ssh/known_hosts and /etc/ssh/ssh_known_hosts files.

Question 3

What does SSH support?

Answer 3

It supports both password-based and key-based authentication.

Question 4

What does ssh-keygen command do?

Answer 4

Generates an SSH key pair for authentication.

Question 5

What does the ssh-copy-id command do?

Answer 5

Exports the public key to remote systems.

Question 6

What does the sshd service do?

Answer 6

Implements the SSH protocol on Red Hat Enterprise Linux systems.

Question 7

Where do you configure advanced SSH settings?

Answer 7

In the /etc/ssh/sshd_config configuration file.

Question 8

What can a sshd_config file be used for?

Answer 8

To disable remote logins as root and to require public key authentication rather than password-based authentication.