diff --git a/docs/daemon.md b/docs/daemon.md
index 456afea..e45535a 100644
--- a/docs/daemon.md
+++ b/docs/daemon.md
@@ -164,7 +164,7 @@ and a http file service should be running, this is done by starting a gshell app
 
 ```shell
 cd /path/to/gshell
-bin/gshell run app-http/fileserver/fileserver.go -dir /path/to/gshell/release
+bin/gshell run util/fileserver/cmd/fileserver.go -dir /path/contains/gshell/release
 ```
 
 ### Disable auto update
diff --git a/gshellbuilder.go b/gshellbuilder.go
index 5e53d56..6d6e268 100644
--- a/gshellbuilder.go
+++ b/gshellbuilder.go
@@ -864,7 +864,7 @@ func ShellMain() error {
   gshellos is a simple pure golang service framework for linux devices.
   One gshell daemon must have been started in the system to join the
 service network with an unique provider ID.
-  Each app/service is run in one dedicated GRE(Gshell Runtime Environment)
+  Each app/service runs in one dedicated GRE(Gshell Runtime Environment)
 which by default runs in a random GRG(Gshell Runtime Group). GREs can be
 grouped into one named GRG for better performance.
   gshell enters interactive mode if no options and no commands provided.
diff --git a/http.go b/http.go
index 9d72561..344e65d 100644
--- a/http.go
+++ b/http.go
@@ -5,7 +5,12 @@ package gshellos
 import (
 	"fmt"
 	"io"
+	"net"
 	"net/http"
+	"os"
+	"syscall"
+
+	as "github.com/godevsig/adaptiveservice"
 )
 
 func init() {
@@ -29,3 +34,10 @@ func httpGetFunc(url string) ([]byte, error) {
 
 	return body, nil
 }
+
+func init() {
+	as.RegisterType((*net.OpError)(nil))
+	as.RegisterType((*net.TCPAddr)(nil))
+	as.RegisterType((*os.SyscallError)(nil))
+	as.RegisterType(syscall.Errno(0))
+}