ssh:tldr:014d5

The command ssh-keygen -y -f ${~--ssh-OpenSSH_private_key} is used to generate the public key from a specified private key file.

Let's break down the command:

• ssh-keygen is the command-line utility used for generating and managing SSH keys.
• -y is an option that tells ssh-keygen to output the public key corresponding to the private key file specified.
• -f is another option that specifies the input private key file from which the public key should be derived.
• ${~--ssh-OpenSSH_private_key} is a placeholder for the actual path and filename of the private key file.

In summary, the command takes a private key file as input and produces the corresponding public key as output. The resulting public key can be used for things like SSH authentication or adding it to a server's authorized keys list.