A systems administrator is configuring new Linux systems and needs to enable passwordless authentication between two of the servers. Which of the following commands should the administrator use?

The correct answer is A. ssh-keygen -t rsa $$ ssh-copy-id -i ~/.ssh/id_rsa.pub john@server2. ssh-keygen -t rsa generates an RSA key pair. ssh-copy-id -i ~/.ssh/id_rsa.pub john@server2 copies the public key to the remote server’s authorized_keys, enabling passwordless login.

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Question

Options

Assh-keygen -t rsa $$ ssh-copy-id -i ~/.ssh/id_rsa.pub john@server2
Bssh-keyscan -t rsa $$ ssh-copy-id john@server2 -i ~/.ssh/key
Cssh-agent -i rsa $$ ssh-copy-id ~/.ssh/key john@server2
Dssh-add -t rsa $$ scp -rp ~/.ssh john@server2

How the community answered

(16 responses)

A
88% (14)
C
6% (1)
D
6% (1)

Explanation

ssh-keygen -t rsa generates an RSA key pair. ssh-copy-id -i ~/.ssh/id_rsa.pub john@server2 copies the public key to the remote server’s authorized_keys, enabling passwordless login.

Topics

#SSH key authentication#ssh-keygen#ssh-copy-id#passwordless auth

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