![]() Option can be used to specify the hash algorithm: ssh-keygen -E md5 -lf /dev/null) To get MD5 hashes of the server key fingerprints (the old behaviour), the -E Recent versions of ssh-keygen print SHA256 fingerprint hashes of the keys. This method wouldn’t work, thus requiring the use of temporary files. Ssh-keygen to read files, did not handle named pipes (FIFOs) very well so Note: With versions of OpenSSH before 7.2, the functions used by If using Bash, Zsh (or the Korn shell), processįor a handy one-liner: ssh-keygen -lf /dev/null) Used with its -l option to print the fingerprint of the specified public To convert this to a fingerprint hash, the ssh-keygen utility can be ![]() Ssh-keyscan prints the host key of the SSH server in Base64-encodedįormat. Would need to be explicitly specified: ssh-keyscan -t rsa,dsa hostname With older versions of ssh-keyscan (before OpenSSH version 5.1), theĭefault key type was the out-dated rsa1 (SSH Protocol 1) so the key types (since version 5.1), ecdsa (since version 6.0), and ed25519 (since version In modern OpenSSH releases, the default key types to be fetched are rsa The type of key to be fetched is specified using the -t option. It was designed to aid in building and verifying Ssh-keyscan is a utility for gathering the public ssh host keys of a Keys without needing to authenticate to the SSH server. ![]() The ssh-keyscan command was developed so that users can obtain public host The following text explains how these commands work and highlights some of theĭifferences in behaviour between older and newer versions of the OpenSSH (replace localhost with the hostname here) Using process substitution: ssh-keygen -lf /dev/null) How this can be done (with versions of OpenSSH 7.2 or newer) in one line I recently had to do this myself so I thought I’d add an answer which shows
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