在更改路由器的名称和密码之前，我能够在 Ubuntu 17.10 上使用 Wi-Fi。从那时起我就无法使用互联网了。我的网络管理器甚至没有显示可用的设备。我尝试了 Askubuntu 上链接中的所有步骤：如何在终端中手动连接和断开网络？
这是我尝试使用该wpa_supplicant方法时得到的结果：
skywalker@lancelot ~ % sudo wpa_supplicant -iwlp2s0 -c/etc/wpa_supplicant/wpa_supplicant.conf -Dnl80211
Successfully initialized wpa_supplicant
wlp2s0: SME: Trying to authenticate with 7a:ff:ca:3a:30:ff (SSID='lancelot' freq=2462 MHz)
wlp2s0: Trying to associate with 7a:ff:ca:3a:30:ff (SSID='lancelot' freq=2462 MHz)
wlp2s0: Associated with 7a:ff:ca:3a:30:ff
wlp2s0: CTRL-EVENT-DISCONNECTED bssid=7a:ff:ca:3a:30:ff reason=3 locally_generated=1
wlp2s0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD
wlp2s0: CTRL-EVENT-SCAN-FAILED ret=-16 retry=1
wlp2s0: SME: Trying to authenticate with 7a:ff:ca:3a:30:ff (SSID='lancelot' freq=2462 MHz)
wlp2s0: Trying to associate with 7a:ff:ca:3a:30:ff (SSID='lancelot' freq=2462 MHz)
wlp2s0: Associated with 7a:ff:ca:3a:30:ff
wlp2s0: CTRL-EVENT-DISCONNECTED bssid=7a:ff:ca:3a:30:ff reason=3 locally_generated=1
wlp2s0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD
以下是更多详细信息
skywalker@lancelot ~ % lspci -knn |grep Net -A2
00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection
[8086:1502] (rev 04)
Subsystem: Dell 82579LM Gigabit Network Connection (Lewisville) [1028:0493]
Kernel driver in use: e1000e
Kernel modules: e1000e
--
02:00.0 Network controller [0280]: Intel Corporation Centrino Ultimate-N 6300 [8086:422b] (rev 35)
Subsystem: Intel Corporation Centrino Ultimate-N 6300 3x3 AGN [8086:1121]
Kernel driver in use: iwlwifi
skywalker@lancelot ~ % uname -a
Linux lancelot 4.13.0-21-generic #24-Ubuntu SMP Mon Dec 18 17:29:16 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
skywalker@lancelot ~ % rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
skywalker@lancelot ~ %
我的问题是， 如何设置我的 Wi-Fi 以便能够连接到任何路由器并使用互联网？
答案1
来自dmesg（评论）：
[ 34.083148] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 77.913658] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
意味着 IPv6 配置失败，要解决该问题，请按照 debian wiki 上描述的步骤禁用 IPv6：如何关闭 IPv6