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-rw-r--r--utils/exportfs/exports.man6
1 files changed, 5 insertions, 1 deletions
diff --git a/utils/exportfs/exports.man b/utils/exportfs/exports.man
index 767db40..8d08667 100644
--- a/utils/exportfs/exports.man
+++ b/utils/exportfs/exports.man
@@ -46,7 +46,11 @@ above pattern does not include hosts such as \fIa.b.cs.foo.edu\fR.
You can also export directories to all hosts on an IP (sub-) network
simultaneously. This is done by specifying an IP address and netmask pair
as
-.IR address/netmask .
+.IR address/netmask
+where the netmask can be specified in dotted-decimal format, or as a
+contiguous mask length (for example, either `/255.255.252.0' or `/22' appended
+to the network base address result in identical subnetworks with 10 bits of
+host).
.TP
'''.B =public
'''This is a special ``hostname'' that identifies the given directory name