HI, i have installed odoo 10 from a .deb file in Ubuntu server 16.04 x86.

I rebooted the system, but when i open odoo from the terminal i got this error:

username@fptachira:~$ odoo
2018-05-14 15:28:46,205 2193 INFO ? odoo: Odoo version 10.0-20180511
2018-05-14 15:28:46,206 2193 INFO ? odoo: addons paths: ['/home/username/.local/share/Odoo/addons/10.0', u'/usr/lib/python2.7/dist-packages/odoo/addons']
2018-05-14 15:28:46,206 2193 INFO ? odoo: database: default@default:default
2018-05-14 15:28:46,223 2193 INFO ? odoo.service.server: HTTP service (werkzeug) running on 0.0.0.0:8069
Exception in thread odoo.service.httpd:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.7/dist-packages/odoo/service/server.py", line 247, in http_thread
    self.httpd = ThreadedWSGIServerReloadable(self.interface, self.port, app)
  File "/usr/lib/python2.7/dist-packages/odoo/service/server.py", line 105, in __init__
    handler=RequestHandler)
  File "/usr/lib/python2.7/dist-packages/werkzeug/serving.py", line 440, in __init__
    HTTPServer.__init__(self, (host, int(port)), handler)
  File "/usr/lib/python2.7/SocketServer.py", line 417, in __init__
    self.server_bind()
  File "/usr/lib/python2.7/dist-packages/odoo/service/server.py", line 115, in server_bind
    super(ThreadedWSGIServerReloadable, self).server_bind()
  File "/usr/lib/python2.7/BaseHTTPServer.py", line 108, in server_bind
    SocketServer.TCPServer.server_bind(self)
  File "/usr/lib/python2.7/SocketServer.py", line 431, in server_bind
    self.socket.bind(self.server_address)
  File "/usr/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
error: [Errno 98] Address already in use
What does this means? I new at odoo, just for learning.