ssh-keygen

create new keypair

ssh-keygen -t rsa -b 4096 -C "comment"
ssh-keygen -t ecdsa -b 521 -C "comment"
ssh-keygen -t ed25519 -C "comment" 

generate public-key from private key

ssh-keygen -y -f private-key

add/change passphrase

ssh-keygen -p -f private-key

add/change comment

ssh-keygen -c -C "new comment" -f private-key

copy public key to remote host (~/.ssh/authorized_keys)

ssh-copy-id -i private-key user@host

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last updated: Tue Oct 3 20:49:47 2023