diff --git a/components/engine/commands.go b/components/engine/commands.go
index d65a19bf3d..779785cb00 100644
--- a/components/engine/commands.go
+++ b/components/engine/commands.go
@@ -161,7 +161,7 @@ func (srv *Server) CmdLogin(stdin io.ReadCloser, stdout rcli.DockerConn, args ..
 
 // 'docker wait': block until a container stops
 func (srv *Server) CmdWait(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "wait", "[OPTIONS] NAME", "Block until a container stops, then print its exit code.")
+	cmd := rcli.Subcmd(stdout, "wait", "CONTAINER [CONTAINER...]", "Block until a container stops, then print its exit code.")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -217,7 +217,7 @@ func (srv *Server) CmdInfo(stdin io.ReadCloser, stdout io.Writer, args ...string
 }
 
 func (srv *Server) CmdStop(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "stop", "[OPTIONS] NAME", "Stop a running container")
+	cmd := rcli.Subcmd(stdout, "stop", "CONTAINER [CONTAINER...]", "Stop a running container")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -239,7 +239,7 @@ func (srv *Server) CmdStop(stdin io.ReadCloser, stdout io.Writer, args ...string
 }
 
 func (srv *Server) CmdRestart(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "restart", "[OPTIONS] NAME", "Restart a running container")
+	cmd := rcli.Subcmd(stdout, "restart", "CONTAINER [CONTAINER...]", "Restart a running container")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -261,7 +261,7 @@ func (srv *Server) CmdRestart(stdin io.ReadCloser, stdout io.Writer, args ...str
 }
 
 func (srv *Server) CmdStart(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "start", "[OPTIONS] NAME", "Start a stopped container")
+	cmd := rcli.Subcmd(stdout, "start", "CONTAINER [CONTAINER...]", "Start a stopped container")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -283,7 +283,7 @@ func (srv *Server) CmdStart(stdin io.ReadCloser, stdout io.Writer, args ...strin
 }
 
 func (srv *Server) CmdInspect(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "inspect", "[OPTIONS] CONTAINER", "Return low-level information on a container")
+	cmd := rcli.Subcmd(stdout, "inspect", "CONTAINER", "Return low-level information on a container")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -318,7 +318,7 @@ func (srv *Server) CmdInspect(stdin io.ReadCloser, stdout io.Writer, args ...str
 }
 
 func (srv *Server) CmdPort(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "port", "[OPTIONS] CONTAINER PRIVATE_PORT", "Lookup the public-facing port which is NAT-ed to PRIVATE_PORT")
+	cmd := rcli.Subcmd(stdout, "port", "CONTAINER PRIVATE_PORT", "Lookup the public-facing port which is NAT-ed to PRIVATE_PORT")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -340,9 +340,9 @@ func (srv *Server) CmdPort(stdin io.ReadCloser, stdout io.Writer, args ...string
 	return nil
 }
 
-// 'docker rmi NAME' removes all images with the name NAME
+// 'docker rmi IMAGE' removes all images with the name IMAGE
 func (srv *Server) CmdRmi(stdin io.ReadCloser, stdout io.Writer, args ...string) (err error) {
-	cmd := rcli.Subcmd(stdout, "rmimage", "[OPTIONS] IMAGE", "Remove an image")
+	cmd := rcli.Subcmd(stdout, "rmimage", "IMAGE [IMAGE...]", "Remove an image")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -363,7 +363,7 @@ func (srv *Server) CmdRmi(stdin io.ReadCloser, stdout io.Writer, args ...string)
 }
 
 func (srv *Server) CmdHistory(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "history", "[OPTIONS] IMAGE", "Show the history of an image")
+	cmd := rcli.Subcmd(stdout, "history", "IMAGE", "Show the history of an image")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -389,7 +389,7 @@ func (srv *Server) CmdHistory(stdin io.ReadCloser, stdout io.Writer, args ...str
 }
 
 func (srv *Server) CmdRm(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "rm", "[OPTIONS] CONTAINER", "Remove a container")
+	cmd := rcli.Subcmd(stdout, "rm", "CONTAINER [CONTAINER...]", "Remove a container")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
@@ -411,10 +411,14 @@ func (srv *Server) CmdRm(stdin io.ReadCloser, stdout io.Writer, args ...string)
 
 // 'docker kill NAME' kills a running container
 func (srv *Server) CmdKill(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "kill", "[OPTIONS] CONTAINER [CONTAINER...]", "Kill a running container")
+	cmd := rcli.Subcmd(stdout, "kill", "CONTAINER [CONTAINER...]", "Kill a running container")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
+	if cmd.NArg() < 1 {
+		cmd.Usage()
+		return nil
+	}
 	for _, name := range cmd.Args() {
 		container := srv.runtime.Get(name)
 		if container == nil {
@@ -429,17 +433,19 @@ func (srv *Server) CmdKill(stdin io.ReadCloser, stdout io.Writer, args ...string
 
 func (srv *Server) CmdImport(stdin io.ReadCloser, stdout rcli.DockerConn, args ...string) error {
 	stdout.Flush()
-	cmd := rcli.Subcmd(stdout, "import", "[OPTIONS] URL|- [REPOSITORY [TAG]]", "Create a new filesystem image from the contents of a tarball")
+	cmd := rcli.Subcmd(stdout, "import", "URL|- [REPOSITORY [TAG]]", "Create a new filesystem image from the contents of a tarball")
 	var archive io.Reader
 	var resp *http.Response
 
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
+	if cmd.NArg() < 1 {
+		cmd.Usage()
+		return nil
+	}
 	src := cmd.Arg(0)
-	if src == "" {
-		return fmt.Errorf("Not enough arguments")
-	} else if src == "-" {
+	if src == "-" {
 		archive = stdin
 	} else {
 		u, err := url.Parse(src)
@@ -739,13 +745,14 @@ func (srv *Server) CmdExport(stdin io.ReadCloser, stdout io.Writer, args ...stri
 
 func (srv *Server) CmdDiff(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
 	cmd := rcli.Subcmd(stdout,
-		"diff", "CONTAINER [OPTIONS]",
+		"diff", "CONTAINER",
 		"Inspect changes on a container's filesystem")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}
 	if cmd.NArg() < 1 {
-		return fmt.Errorf("Not enough arguments")
+		cmd.Usage()
+		return nil
 	}
 	if container := srv.runtime.Get(cmd.Arg(0)); container == nil {
 		return fmt.Errorf("No such container")
@@ -762,7 +769,7 @@ func (srv *Server) CmdDiff(stdin io.ReadCloser, stdout io.Writer, args ...string
 }
 
 func (srv *Server) CmdLogs(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	cmd := rcli.Subcmd(stdout, "logs", "[OPTIONS] CONTAINER", "Fetch the logs of a container")
+	cmd := rcli.Subcmd(stdout, "logs", "CONTAINER", "Fetch the logs of a container")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}