+.\" $OpenBSD: ssh-keyscan.1,v 1.8 2001/06/23 17:48:18 itojun Exp $
+.\"
+.\" Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>.
+.\"
+.\" Modification and redistribution in source and binary forms is
+.\" permitted provided that due credit is given to the author and the
+.\" OpenBSD project by leaving this copyright notice intact.
+.\"
.Dd January 1, 1996
-.Dt ssh-keyscan 1
+.Dt SSH-KEYSCAN 1
.Os
.Sh NAME
.Nm ssh-keyscan
parallel, so it is very efficient. The keys from a domain of 1,000
hosts can be collected in tens of seconds, even when some of those
hosts are down or do not run ssh. You do not need login access to the
-machines you are scanning, nor does does the scanning process involve
+machines you are scanning, nor does the scanning process involve
any encryption.
.Sh SECURITY
If you make an ssh_known_hosts file using
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl t
-Set the timeout for connection attempts. If
+Set the timeout for connection attempts. If
.Pa timeout
seconds have elapsed since a connection was initiated to a host or since the
last time anything was read from that host, then the connection is
closed and the host in question considered unavailable. Default is 5
seconds.
.It Fl f
-Read hosts or
+Read hosts or
.Pa addrlist namelist
pairs from this file, one per line.
If
.Pa -
is supplied instead of a filename,
.Nm
-will read hosts or
+will read hosts or
.Pa addrlist namelist
pairs from the standard input.
+.El
.Sh EXAMPLES
-.Pp
Print the host key for machine
.Pa hostname :
.Bd -literal
which have new or different keys from those in the sorted file
.Pa ssh_known_hosts :
.Bd -literal
-ssh-keyscan -f ssh_hosts | sort -u - ssh_known_hosts | \e\
+$ ssh-keyscan -f ssh_hosts | sort -u - ssh_known_hosts | \e\
diff ssh_known_hosts -
.Ed
-.Pp
.Sh FILES
-.Pp
.Pa Input format:
1.2.3.4,1.2.4.4 name.my.domain,name,n.my.domain,n,1.2.3.4,1.2.4.4
.Pp
This is because it opens a connection to the ssh port, reads the public
key, and drops the connection as soon as it gets the key.
.Sh SEE ALSO
-.Xr ssh 1
+.Xr ssh 1 ,
.Xr sshd 8
-.Sh AUTHOR
+.Sh AUTHORS
David Mazieres <dm@lcs.mit.edu>