diff --git a/bin/swift-init b/bin/swift-init
index c8e0aef5c6..a5304e7f3f 100755
--- a/bin/swift-init
+++ b/bin/swift-init
@@ -26,6 +26,14 @@ USAGE = \
 where:
     <server>  is the name of a swift service e.g. proxy-server.
               The '-server' part of the name may be omitted.
+              'all', 'main' and 'rest' are reserved words that represent a
+              group of services.
+              all: Expands to all swift daemons.
+              main: Expands to main swift daemons.
+                    (proxy, container, account, object)
+              rest: Expands to all remaining background daemons (beyond
+                    "main").
+                    (updater, replicator, auditor, etc)
     <config>  is an explicit configuration filename without the
               .conf extension. If <config> is specified then <server> should
               refer to a directory containing the configuration file, e.g.: