OpenSSH/Configure OpenSSH to allow Public-key authentication

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Create file touch ~/.ssh/authorized_keys and add public key of client to provide access.

Limit connecting host and command: It is also possible also to lock access to only be able to run a specific command, or use it only from a specific host [1]. See man ssh.

Example syntax::cat ~/.ssh/authorized_keys

from="",command="/path/to/executable argument" ssh-rsa key name

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