===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/ssh-keygen.1,v
retrieving revision 1.142
retrieving revision 1.143
diff -u -r1.142 -r1.143
--- src/usr.bin/ssh/ssh-keygen.1	2017/06/28 01:09:22	1.142
+++ src/usr.bin/ssh/ssh-keygen.1	2017/07/07 03:53:12	1.143
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: ssh-keygen.1,v 1.142 2017/06/28 01:09:22 djm Exp $
+.\"	$OpenBSD: ssh-keygen.1,v 1.143 2017/07/07 03:53:12 djm Exp $
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -35,7 +35,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: June 28 2017 $
+.Dd $Mdocdate: July 7 2017 $
 .Dt SSH-KEYGEN 1
 .Os
 .Sh NAME
@@ -126,6 +126,7 @@
 .Op Fl f Ar input_keyfile
 .Nm ssh-keygen
 .Fl A
+.Op Fl f Ar prefix_path
 .Nm ssh-keygen
 .Fl k
 .Fl f Ar krl_file
@@ -224,6 +225,10 @@
 for which host keys
 do not exist, generate the host keys with the default key file path,
 an empty passphrase, default bits for the key type, and default comment.
+If a
+.Fl f
+option has been specified, then its argument is used as a prefix to the
+default path for the resulting host key files.
 This is used by
 .Pa /etc/rc
 to generate new host keys.