From fda940c75a1cb8439debbef0ad99525ba834869f Mon Sep 17 00:00:00 2001
From: trasz <trasz@FreeBSD.org>
Date: Sun, 23 Apr 2017 08:36:29 +0000
Subject: MFC r315560:

Document how to use reroot with NFS.

Sponsored by:	DARPA, AFRL
---
 sbin/reboot/reboot.8 | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sbin/reboot/reboot.8 b/sbin/reboot/reboot.8
index d0afe67..55d8062 100644
--- a/sbin/reboot/reboot.8
+++ b/sbin/reboot/reboot.8
@@ -28,7 +28,7 @@
 .\"	@(#)reboot.8	8.1 (Berkeley) 6/9/93
 .\" $FreeBSD$
 .\"
-.Dd Dec 12, 2015
+.Dd March 19, 2017
 .Dt REBOOT 8
 .Os
 .Sh NAME
@@ -152,6 +152,13 @@ Replace current root filesystem with UFS mounted from
 kenv vfs.root.mountfrom=ufs:/dev/ada0s1a
 reboot -r
 .Ed
+.Pp
+This mechanism can also be used with NFS, with a caveat that
+it only works with NFSv4, and requires a numeric IPv4 address:
+.Bd -literal -offset indent
+kenv vfs.root.mountfrom=nfs:192.168.1.1:/share/name
+reboot -r
+.Ed
 .Sh SEE ALSO
 .Xr kenv 1 ,
 .Xr getutxent 3 ,
-- 
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