Linux in a Nutshell, 6th Edition

Name

ssh-keyscan

Synopsis

ssh-keyscan [options]

Gather public and private host keys from a number of hosts. Can be used in scripts.

Options

−4

Use IPv4 addresses only.

−6

Use IPv6 addresses only.

-f file

Read hostnames or addrlist namelist pairs from file. If - is specified instead of a filename, read hosts or addrlist namelist pairs from standard input.

-H

Hash hostnames and addresses in the output.

-p port

Specify the port to connect to on the remote host.

-t type

Specify the type of key to get from the scanned hosts. Possible values are rsa1 for SSH1 (default), or rsa or dsa for SSH2. Specify multiple values in a comma-separated list.

-T timeout

Specify the timeout for attempting a connection, in seconds. Default is 5 seconds.

-v

Verbose mode.