SSH
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Secure Shell
ssh
-i <key> Specify Keyfile
ssh-keygen
-C "Comment" Add comment
-N "" Provide passphrase
-t ed25519 Use EdDSA algorithm
ssh-copy-id
-i <key> Specify Keyfile
Regenerate Host Keys (Debian)
1. rm -v /etc/ssh/ssh_host_*
2. dpkg-reconfigure openssh-server