mostrando que o WiFi está conectado, mas o sistema está offline no 16.04 LTS ubuntu

Question

Eu mudei meu sistema operacional 14.04 para 16.04, após a instalação mostrando que a rede WiFi estava conectada, mas a Internet não está acessível (tentei executar o ping com resultados inacessíveis).

ifconfig results

enp3s0    Link encap:Ethernet  HWaddr 3c:97:0e:1b:6b:07  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:19 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:1661 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1661 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:128960 (128.9 KB)  TX bytes:128960 (128.9 KB)

wlp2s0b1  Link encap:Ethernet  HWaddr 84:4b:f5:51:cc:7c  
          inet addr:10.42.0.1  Bcast:10.42.0.255  Mask:255.255.255.0
          inet6 addr: 2405:204:d308:6386:864b:f5ff:fe51:cc7c/64 Scope:Global
          inet6 addr: fe80::864b:f5ff:fe51:cc7c/64 Scope:Link
          inet6 addr: 2405:204:d308:6386:dd9e:bb6a:f58d:dc71/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7387 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6863 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:6515015 (6.5 MB)  TX bytes:811757 (811.7 KB)

Como posso resolver este problema

    

Answer 1

execute o comando iwconfig  então os resultados

    lo        no wireless extensions.

wlp2s0b1  IEEE 802.11bgn  ESSID:"JFi2518A0E"  
          Mode:Managed  Frequency:2.442 GHz  Access Point: C8:D7:79:51:8A:0E   
          Bit Rate=72.2 Mb/s   Tx-Power=19 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=67/70  Signal level=-43 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:5   Missed beacon:0

enp3s0    no wireless extensions.

então executou estes comandos para subir wlp2s0b1

 sudo ifconfig wlp2s0b1 up
service network-manager restart