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How to see the available SSH keys in the OpenSSH authentication agent

How to see the available SSH keys in the OpenSSH authentication agent?

Use the ssh-add command to display any available keys that are known to the SSH agent.

ssh-add -l

The OpenSSH authentication agent stores the SSH identities and may use them when connecting to a SSH server. With the ssh-add command and -l option the fingerprints of the known identities can be shown.

ssh-add -l

If the agent is not running, then you will see the message ‘Could not open a connection to your authentication agent.’.

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