diff --git a/.gitignore b/.gitignore
index 260775ff9..ac2d768f8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,5 +21,6 @@ migrations/
 host_rsa_key
 *.bat
 tags
-tmp/*
 jumpserver.iml
+.python-version
+tmp/*
diff --git a/apps/assets/forms.py b/apps/assets/forms.py
index 7c176b026..415b5b9fb 100644
--- a/apps/assets/forms.py
+++ b/apps/assets/forms.py
@@ -179,14 +179,6 @@ class IDCForm(forms.ModelForm):
 
 
 class AdminUserForm(forms.ModelForm):
-    # Admin user assets define, let user select, save it in form not in view
-    assets = forms.ModelMultipleChoiceField(
-        queryset=Asset.objects.all(),
-        label=_('Asset'),
-        required=False,
-        widget=forms.SelectMultiple(
-            attrs={'class': 'select2', 'data-placeholder': _('Select assets')})
-    )
     # Form field name can not start with `_`, so redefine it,
     password = forms.CharField(
         widget=forms.PasswordInput, max_length=100,
@@ -196,20 +188,6 @@ class AdminUserForm(forms.ModelForm):
     # Need use upload private key file except paste private key content
     private_key_file = forms.FileField(required=False)
 
-    def __init__(self, *args, **kwargs):
-        # When update a admin user instance, initial it
-        if kwargs.get('instance'):
-            initial = kwargs.get('initial', {})
-            initial['assets'] = kwargs['instance'].assets.all()
-        super(AdminUserForm, self).__init__(*args, **kwargs)
-
-    def _save_m2m(self):
-        # Save assets relation with admin user
-        super(AdminUserForm, self)._save_m2m()
-        assets = self.cleaned_data['assets']
-        self.instance.assets.clear()
-        self.instance.assets.add(*tuple(assets))
-
     def save(self, commit=True):
         # Because we define custom field, so we need rewrite :method: `save`
         admin_user = super(AdminUserForm, self).save(commit=commit)
diff --git a/apps/assets/templates/assets/admin_user_create_update.html b/apps/assets/templates/assets/admin_user_create_update.html
index d1b83c6d1..d7d5094ff 100644
--- a/apps/assets/templates/assets/admin_user_create_update.html
+++ b/apps/assets/templates/assets/admin_user_create_update.html
@@ -38,7 +38,6 @@
                             {% bootstrap_field form.username layout="horizontal" %}
                             {% bootstrap_field form.password layout="horizontal" %}
                             {% bootstrap_field form.private_key_file layout="horizontal" %}
-                            {% bootstrap_field form.assets layout="horizontal" %}
                             {% bootstrap_field form.comment layout="horizontal" %}
 
                             <div class="form-group">
diff --git a/apps/common/utils.py b/apps/common/utils.py
index 45aac13c8..d53b3db6c 100644
--- a/apps/common/utils.py
+++ b/apps/common/utils.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 #
-from __future__ import unicode_literals
 
 from collections import OrderedDict
 from six import string_types
@@ -55,6 +54,8 @@ class Signer(object):
         self.secret_key = secret_key
 
     def sign(self, value):
+        if isinstance(value, bytes):
+            value = value.decode("utf-8")
         s = JSONWebSignatureSerializer(self.secret_key)
         return s.dumps(value)
 
@@ -194,9 +195,10 @@ def ssh_key_string_to_obj(text):
 
 
 def ssh_pubkey_gen(private_key=None, username='jumpserver', hostname='localhost'):
+    if isinstance(private_key, bytes):
+        private_key = private_key.decode("utf-8")
     if isinstance(private_key, string_types):
         private_key = ssh_key_string_to_obj(private_key)
-
     if not isinstance(private_key, (paramiko.RSAKey, paramiko.DSSKey)):
         raise IOError('Invalid private key')
 
@@ -237,6 +239,8 @@ def ssh_key_gen(length=2048, type='rsa', password=None, username='jumpserver', h
 
 
 def validate_ssh_private_key(text):
+    if isinstance(text, bytes):
+        text = text.decode("utf-8")
     key = ssh_key_string_to_obj(text)
     if key is None:
         return False
diff --git a/apps/templates/_nav.html b/apps/templates/_nav.html
index f252db47d..020268f35 100644
--- a/apps/templates/_nav.html
+++ b/apps/templates/_nav.html
@@ -36,7 +36,7 @@
 
 <li id="applications">
     <a>
-        <i class="fa fa-coffee"></i> <span class="nav-label">{% trans 'Applications' %}</span><span class="fa arrow"></span>
+        <i class="fa fa-rocket"></i> <span class="nav-label">{% trans 'Applications' %}</span><span class="fa arrow"></span>
     </a>
     <ul class="nav nav-second-level">
         <li id="terminal"><a href="{% url 'applications:terminal-list' %}">{% trans 'Terminal' %}</a></li>
diff --git a/tmp/.gitkeep b/tmp/.gitkeep
index e69de29bb..a43b1b292 100644
--- a/tmp/.gitkeep
+++ b/tmp/.gitkeep
@@ -0,0 +1 @@
+Because ansible connect remote host using key file path except key string, so I create this dir for keep them.
\ No newline at end of file