ssh-keyscan Command Reference - SSH

Syntax

ssh-keyscan [options] hostname

Parameters	Description	Examples	Level
`-t`		`ssh-keyscan -t ed25519 host`	Common
`-p`		`ssh-keyscan -p 2222 host`	Common
`-H`		`ssh-keyscan -H host >> ~/.ssh/known_hosts`	Advanced
`-f`		`ssh-keyscan -f hosts.txt`	Advanced
`-T`	()	`ssh-keyscan -T 5 host`	Advanced

ssh-keyscan github.com >> ~/.ssh/known_hosts

CI/CD Common,

ssh-keyscan -t ed25519,rsa server.example.com

ed25519 and rsa

ssh-keyscan -f server_list.txt >> ~/.ssh/known_hosts

ssh-keyscan -H 192.168.1.100 >> ~/.ssh/known_hosts

known_hosts IP

getaddrinfo: Name or service not known, DNS IP

Connection timed out,