RHCSA RHCSA SSH and Remote Access Configuration 3

Question 1

Which command shows active SSH connections to the local system?

Accepted Answer

ss -tnp | grep :22

Answer

`ss -tnp` lists TCP socket connections and filtering for `:22` shows active SSH sessions with their PIDs.

Question 2

What is the purpose of the `~/.ssh/known_hosts` file?

Accepted Answer

Stores fingerprints of previously connected SSH servers

Answer

`known_hosts` caches the host key fingerprints of remote servers to detect man-in-the-middle attacks on future connections.

Question 3

Which `sshd_config` directive sets the maximum number of concurrent unauthenticated SSH connections?

Accepted Answer

MaxStartups

Answer

`MaxStartups` limits unauthenticated connection attempts, helping protect against connection-based brute-force attacks.

Question 4

How do you use SCP to copy a local file to a remote host's `/tmp` directory?

Accepted Answer

scp localfile user@host:/tmp/

Answer

`scp source user@host:destination` securely copies files over SSH; the colon separates the host from the remote path.

Question 5

Which SSH client config file allows you to define aliases and per-host settings for SSH connections?

Accepted Answer

~/.ssh/config

Answer

The `~/.ssh/config` file lets users define `Host` blocks with per-host settings like IdentityFile, Port, and User.

RHCSA Exam Practice Test