diff --git a/file/outline.go b/file/outline.go
new file mode 100755
index 0000000..2f1cfea
--- /dev/null
+++ b/file/outline.go
@@ -0,0 +1,50 @@
+// Copyright (c) 2014, B3log
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package file
+
+import (
+	"encoding/json"
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"net/http"
+
+	"github.com/b3log/wide/util"
+)
+
+// GetOutline gets outfile of a go file.
+func GetOutline(w http.ResponseWriter, r *http.Request) {
+	data := map[string]interface{}{"succ": true}
+	defer util.RetJSON(w, r, data)
+
+	var args map[string]interface{}
+
+	if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
+		logger.Error(err)
+		data["succ"] = false
+
+		return
+	}
+
+	code := args["code"].(string)
+
+	fset := token.NewFileSet()
+	f, err := parser.ParseFile(fset, "", code, 0)
+	if err != nil {
+		panic(err)
+	}
+
+	ast.Print(fset, f)
+}
diff --git a/main.go b/main.go
index 0025387..84e8822 100644
--- a/main.go
+++ b/main.go
@@ -133,6 +133,9 @@ func main() {
 	http.HandleFunc(conf.Wide.Context+"/file/search/text", handlerWrapper(file.SearchText))
 	http.HandleFunc(conf.Wide.Context+"/file/find/name", handlerWrapper(file.Find))
 
+	// outline
+	http.HandleFunc(conf.Wide.Context+"/outline", handlerWrapper(file.GetOutline))
+
 	// file export/import
 	http.HandleFunc(conf.Wide.Context+"/file/zip/new", handlerWrapper(file.CreateZip))
 	http.HandleFunc(conf.Wide.Context+"/file/zip", handlerWrapper(file.GetZip))
diff --git a/output/namespace_linux.go b/output/namespace_linux.go
index 6281790..f8bab9e 100644
--- a/output/namespace_linux.go
+++ b/output/namespace_linux.go
@@ -24,7 +24,7 @@ func setNamespace(cmd *exec.Cmd) {
 
 	cmd.SysProcAttr = &syscall.SysProcAttr{}
 	//cmd.SysProcAttr.Cloneflags = syscall.CLONE_NEWUSER | syscall.CLONE_NEWNS | syscall.CLONE_NEWUTS | syscall.CLONE_NEWPID | syscall.CLONE_NEWIPC | syscall.CLONE_NEWNET
-	cmd.SysProcAttr.Cloneflags = syscall.CLONE_NEWUSER | syscall.CLONE_NEWNS | syscall.CLONE_NEWUTS | syscall.CLONE_NEWPID | syscall.CLONE_NEWIPC
+	cmd.SysProcAttr.Cloneflags = syscall.CLONE_NEWUSER /*| syscall.CLONE_NEWNS*/ | syscall.CLONE_NEWUTS | syscall.CLONE_NEWPID | syscall.CLONE_NEWIPC /*| syscall.CLONE_NEWNET*/
 	cmd.SysProcAttr.Credential = &syscall.Credential{
 		Uid: 0,
 		Gid: 0,