ssh-keyscan

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.

-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.

-v
Verbose mode.