我正在运行 14.4LTS 桌面。系统启动时，网络根据设置进行配置/etc/network/interfaces。我可以通过 ssh 远程 ping 或登录到该框。
当本地用户通过图形界面登录时，eth0 网络运行约 10-30 秒（最初可见有线图标），然后系统删除/禁用该设备，没有可用的网络，只显示一个空的 wifi 图标。我有一个过去已配置过的 usb wifi 设备，但它没有连接到计算机。
如果我打开一个术语并运行sudo ifconfig eth0 up，则网络已启用（静态地址），并且 NetworkManager 图标将更改为有线图标并注意到接口ifupdown已连接。
一些相关的日志消息：
<trimmed for space>
和我的 NetworkManager.conf 文件：
# This file is installed into /etc/NetworkManager, and is loaded by
# NetworkManager by default. To override, specify: '--config file'
# during NM startup. This can be done by appending to DAEMON_OPTS in
# the file:
#
# /etc/default/NetworkManager
#
[main]
plugins=ifupdown,keyfile
#no-auto-default=00:1a:a0:53:a2:3f,
[ifupdown]
managed=true
和我的接口文件：
auto lo eth0
iface lo inet loopback
allow-hotplug eth0
auto eth0
iface eth0 inet static
address 192.168.166.21
netmask 255.255.255.0
gateway 192.168.166.99
dns-nameservers 8.8.8.8 192.168.166.99
有线连接以前可以正常启动；我相信只有在有线网络断线时我临时需要为盒子添加 wifi 连接时才会启动。在发帖之前，我已经删除了我的 wifi 配置，但有线连接“断线”的问题仍然存在。
出了点问题。有什么想法吗？我似乎无法将这个特定的用户专属问题与网络上其他类似的问题联系起来。对于大多数遇到类似问题的人来说，网络只是瘫痪了，要么全有，要么全无。对于我的系统，这似乎是特定于用户的。
更多内容
在我下面的评论/回复之后，这是我更新的接口文件。我还只在自己的问题解决阶段添加了热插拔选项，因为我认为这是一个很好的功能，以防我因为某种原因不得不更换电缆。我删除了这一行只是为了听取一些人的建议。没什么不同。
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 192.168.166.21
netmask 255.255.255.0
gateway 192.168.166.99
dns-nameservers 8.8.8.8 192.168.166.99
附加内容 #2
我刚刚意识到，尽管网络正在运行，但在使用 ifconfig 命令并且 DNS 解析正常工作后，我的网络应用程序都无法连接到 Internet。这包括 Skype、电子邮件（Thunderbird）、Web 浏览和 PIA。我在 NetworkManager 中将 managed 重新设置为 true 并重新启动它。现在我所有的应用程序都可以正常工作了。我认为这是在我自己尝试这种方法时发生的，之后我才来这里寻求帮助。那么，现在可能发生了什么？在如上所述“修复”NM 之前，我可以 ping 我的路由器并从命令行执行 nslookup/dig，没有任何问题。呃。有什么想法吗？这似乎有点……不正常。这不是我的主要桌面，所以在前面提到的更改之后我实际上没有尝试过任何应用程序。
当我重新配置/重新启动 NM 时，这些似乎是来自 syslog 的接口的相关日志消息：
Jun 15 09:21:33 morpheus NetworkManager[1325]: message repeated 5 times: [ <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)]
Jun 15 17:55:52 morpheus NetworkManager[1325]: Ifupdown: get unmanaged devices count: 1
Jun 15 17:56:04 morpheus NetworkManager[1325]: <info> caught signal 15, shutting down normally.
Jun 15 17:56:04 morpheus NetworkManager[1325]: <info> exiting (success)
Jun 15 17:56:04 morpheus ModemManager[1134]: <info> Caught signal, shutting down...
Jun 15 17:56:04 morpheus ModemManager[1134]: <info> ModemManager is shut down
Jun 15 17:56:04 morpheus ModemManager[13743]: <info> ModemManager (version 1.0.0) starting...
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> NetworkManager (version 0.9.8.8) is starting...
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Read config file /etc/NetworkManager/NetworkManager.conf
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> WEXT support is enabled
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> VPN: loaded org.freedesktop.NetworkManager.openvpn
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> VPN: loaded org.freedesktop.NetworkManager.pptp
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: init!
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: update_system_hostname
Jun 15 17:56:05 morpheus NetworkManager[13750]: interface-parser: parsing file /etc/network/interfaces
Jun 15 17:56:05 morpheus NetworkManager[13750]: interface-parser: finished parsing file /etc/network/interfaces
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPluginIfupdown: guessed connection type (eth0) = 802-3-ethernet
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: update_connection_setting_from_if_block: name:eth0, type:802-3-ethernet, id:Ifupdown (eth0), uuid: 681b428f-beaf-8932-dce4-687ed5bae28e
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: addresses count: 1
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: adding eth0 to connections
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: adding iface eth0 to eni_ifaces
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: autoconnect
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPluginIfupdown: management mode: managed
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1c.4/0000:03:00.0/net/eth0, iface: eth0)
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPluginIfupdown: locking wired connection setting
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/lo, iface: lo)
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/lo, iface: lo): no ifupdown configuration found.
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: end _init.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Loaded plugin ifupdown: (C) 2008 Canonical Ltd. To report bugs please use the NetworkManager mailing list.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Loaded plugin keyfile: (c) 2007 - 2010 Red Hat, Inc. To report bugs please use the NetworkManager mailing list.
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: (23482128) ... get_connections.
Jun 15 17:56:05 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: (23482128) connections count: 1
Jun 15 17:56:05 morpheus NetworkManager[13750]: claim_connection: assertion 'nm_connection_get_path (NM_CONNECTION (connection)) == NULL' failed
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US New York City ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US New York City'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - New Zealand ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - New Zealand'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Denmark ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Denmark'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US West ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US West'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Switzerland ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Switzerland'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Norway ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Norway'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US Midwest ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US Midwest'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Germany ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Germany'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Japan ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Japan'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Romania ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Romania'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Netherlands ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Netherlands'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing Optus Mobile Internet (handsets) 1 ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'Optus Mobile Internet (handsets) 1'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - AU Melbourne ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - AU Melbourne'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Singapore ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Singapore'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US California ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US California'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Hong Kong ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Hong Kong'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Sweden ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Sweden'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - AU Sydney ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - AU Sydney'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Russia ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Russia'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US Silicon Valley ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US Silicon Valley'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Ireland ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Ireland'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - France ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - France'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - CA North York ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - CA North York'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US Florida ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US Florida'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US Seattle ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US Seattle'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Turkey ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Turkey'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Israel ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Israel'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - CA Toronto ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - CA Toronto'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Finland ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Finland'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US Texas ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US Texas'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Italy ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Italy'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Brazil ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Brazil'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - UK Southampton ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - UK Southampton'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - India ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - India'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - US East ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - US East'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - UK London ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - UK London'
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: parsing PIA - Mexico ...
Jun 15 17:56:05 morpheus NetworkManager[13750]: keyfile: read connection 'PIA - Mexico'
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> monitoring kernel firmware directory '/lib/firmware'.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> WiFi enabled by radio killswitch; disabled by state file
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> WWAN enabled by radio killswitch; enabled by state file
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> WiMAX enabled by radio killswitch; enabled by state file
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Networking is enabled by state file
Jun 15 17:56:05 morpheus NetworkManager[13750]: <warn> failed to allocate link cache: (-12) Object not found
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> (eth0): carrier is ON
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> (eth0): new Ethernet device (driver: 'tg3' ifindex: 2)
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> (eth0): exported as /org/freedesktop/NetworkManager/Devices/0
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> (eth0): device state change: unmanaged -> unavailable (reason 'connection-assumed') [10 20 41]
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> (eth0): preparing device.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) starting connection 'Ifupdown (eth0)'
Jun 15 17:56:05 morpheus NetworkManager[13750]: (nm-device.c:3918):nm_device_activate: runtime check failed: (priv->state == NM_DEVICE_STATE_DISCONNECTED)
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> (eth0): device state change: unavailable -> ip-config (reason 'none') [20 70 0]
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> NetworkManager state is now CONNECTING
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <warn> /sys/devices/virtual/net/lo: couldn't determine device driver; ignoring...
Jun 15 17:56:05 morpheus NetworkManager[13750]: <warn> /sys/devices/virtual/net/lo: couldn't determine device driver; ignoring...
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> urfkill disappeared from the bus
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Configure Commit) scheduled...
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) Beginning IP6 addrconf.
Jun 15 17:56:05 morpheus avahi-daemon[1181]: Withdrawing address record for fe80::21a:a0ff:fe53:a23f on eth0.
Jun 15 17:56:05 morpheus avahi-daemon[1181]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::21a:a0ff:fe53:a23f.
Jun 15 17:56:05 morpheus avahi-daemon[1181]: Interface eth0.IPv6 no longer relevant for mDNS.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> ModemManager available in the bus
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) started...
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> (eth0): device state change: ip-config -> secondaries (reason 'none') [70 90 0]
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) complete.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> (eth0): device state change: secondaries -> activated (reason 'none') [90 100 0]
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> NetworkManager state is now CONNECTED_GLOBAL
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Policy set 'Ifupdown (eth0)' (eth0) as default for IPv4 routing and DNS.
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Writing DNS information to /sbin/resolvconf
Jun 15 17:56:05 morpheus NetworkManager[13750]: <info> Activation (eth0) successful, device activated.
Jun 15 17:56:05 morpheus dbus[1069]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
Jun 15 17:56:05 morpheus dbus[1069]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun 15 17:56:06 morpheus whoopsie[1438]: online
Jun 15 17:56:06 morpheus ntpd[2566]: ntpd exiting on signal 15
Jun 15 17:56:07 morpheus avahi-daemon[1181]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::21a:a0ff:fe53:a23f.
Jun 15 17:56:07 morpheus avahi-daemon[1181]: New relevant interface eth0.IPv6 for mDNS.
Jun 15 17:56:07 morpheus avahi-daemon[1181]: Registering new address record for fe80::21a:a0ff:fe53:a23f on eth0.*.
Jun 15 17:56:07 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) starting DHCPv6 as requested by IPv6 router...
Jun 15 17:56:07 morpheus NetworkManager[13750]: <info> Activation (eth0) Beginning DHCPv6 transaction (timeout in 45 seconds)
Jun 15 17:56:07 morpheus ModemManager[13743]: <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.4/0000:03:00.0': not supported by any plugin
Jun 15 17:56:07 morpheus NetworkManager[13750]: <info> dhclient started with pid 13866
Jun 15 17:56:07 morpheus dhclient: Internet Systems Consortium DHCP Client 4.2.4
Jun 15 17:56:07 morpheus dhclient: Copyright 2004-2012 Internet Systems Consortium.
Jun 15 17:56:07 morpheus dhclient: All rights reserved.
Jun 15 17:56:07 morpheus dhclient: For info, please visit https://www.isc.org/software/dhcp/
Jun 15 17:56:07 morpheus dhclient:
Jun 15 17:56:07 morpheus NetworkManager[13750]: <info> (eth0): DHCPv6 state changed nbi -> preinit6
Jun 15 17:56:07 morpheus dhclient: Bound to *:546
Jun 15 17:56:07 morpheus dhclient: Listening on Socket/eth0
Jun 15 17:56:07 morpheus dhclient: Sending on Socket/eth0
Jun 15 17:56:08 morpheus dhclient: XMT: Solicit on eth0, interval 1080ms.
Jun 15 17:56:09 morpheus dhclient: XMT: Solicit on eth0, interval 2160ms.
Jun 15 17:56:10 morpheus htmlgend[2457]: <1465977370292> : Generated: 42 ms: 18 images, 14 template files
Jun 15 17:56:11 morpheus dhclient: XMT: Solicit on eth0, interval 4180ms.
Jun 15 17:56:15 morpheus NetworkManager[13750]: <info> WiFi hardware radio set disabled
Jun 15 17:56:16 morpheus dhclient: XMT: Solicit on eth0, interval 8720ms.
Jun 15 17:56:19 morpheus avahi-daemon[1181]: Withdrawing address record for fe80::21a:a0ff:fe53:a23f on eth0.
Jun 15 17:56:19 morpheus avahi-daemon[1181]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::21a:a0ff:fe53:a23f.
Jun 15 17:56:19 morpheus avahi-daemon[1181]: Interface eth0.IPv6 no longer relevant for mDNS.
Jun 15 17:56:20 morpheus ntpdate[13856]: sendto(golem.canonical.com): Cannot assign requested address
Jun 15 17:56:22 morpheus ntpdate[13856]: adjust time server 202.147.104.60 offset 0.006096 sec
Jun 15 17:56:22 morpheus ntpd[13957]: ntpd [email protected] Thu Feb 11 18:30:40 UTC 2016 (1)
Jun 15 17:56:22 morpheus ntpd[13958]: proto: precision = 0.101 usec
Jun 15 17:56:22 morpheus ntpd[13958]: ntp_io: estimated max descriptors: 1024, initial socket boundary: 16
Jun 15 17:56:22 morpheus ntpd[13958]: Listen and drop on 0 v4wildcard 0.0.0.0 UDP 123
Jun 15 17:56:22 morpheus ntpd[13958]: Listen and drop on 1 v6wildcard :: UDP 123
Jun 15 17:56:22 morpheus ntpd[13958]: Listen normally on 2 lo 127.0.0.1 UDP 123
Jun 15 17:56:22 morpheus ntpd[13958]: Listen normally on 3 eth0 192.168.166.21 UDP 123
Jun 15 17:56:22 morpheus ntpd[13958]: peers refreshed
Jun 15 17:56:22 morpheus ntpd[13958]: Listening on routing socket on fd #20 for interface updates
Jun 15 17:56:24 morpheus dhclient: XMT: Solicit on eth0, interval 18110ms.
Jun 15 17:56:24 morpheus dhclient: send_packet6: Cannot assign requested address
Jun 15 17:56:24 morpheus dhclient: dhc6: send_packet6() sent -1 of 79 bytes
Jun 15 17:56:25 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/tun0, iface: tun0)
Jun 15 17:56:25 morpheus NetworkManager[13750]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/tun0, iface: tun0): no ifupdown configuration found.
Jun 15 17:56:25 morpheus NetworkManager[13750]: <warn> /sys/devices/virtual/net/tun0: couldn't determine device driver; ignoring...
Jun 15 17:56:26 morpheus ntpd[13958]: Listen normally on 4 tun0 10.145.1.6 UDP 123
Jun 15 17:56:26 morpheus ntpd[13958]: 91.189.89.199 interface 192.168.166.21 -> 10.145.1.6
Jun 15 17:56:26 morpheus ntpd[13958]: 27.124.125.250 interface 192.168.166.21 -> 10.145.1.6
Jun 15 17:56:26 morpheus ntpd[13958]: 27.124.125.251 interface 192.168.166.21 -> 10.145.1.6
Jun 15 17:56:26 morpheus ntpd[13958]: 27.124.125.252 interface 192.168.166.21 -> 10.145.1.6
Jun 15 17:56:26 morpheus ntpd[13958]: 54.252.129.186 interface 192.168.166.21 -> 10.145.1.6
Jun 15 17:56:26 morpheus ntpd[13958]: peers refreshed
Jun 15 17:56:26 morpheus ntpd[13958]: new interface(s) found: waking up resolver
Jun 15 17:56:42 morpheus dhclient: XMT: Solicit on eth0, interval 35840ms.
Jun 15 17:56:42 morpheus dhclient: send_packet6: Cannot assign requested address
Jun 15 17:56:42 morpheus dhclient: dhc6: send_packet6() sent -1 of 79 bytes
Jun 15 17:56:52 morpheus NetworkManager[13750]: <warn> (eth0): DHCPv6 request timed out.
Jun 15 17:56:52 morpheus NetworkManager[13750]: <info> (eth0): canceled DHCP transaction, DHCP client pid 13866
Jun 15 17:56:52 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
Jun 15 17:56:52 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) started...
Jun 15 17:56:52 morpheus NetworkManager[13750]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
开头那个奇怪的时间戳与同一事件有关，尽管它看起来发生在一天中完全不同的时间。也许我发现了一个错误（耶）？
答案1
尝试以下配置：
NetworkManager.conf 文件：
# This file is installed into /etc/NetworkManager, and is loaded by
# NetworkManager by default. To override, specify: '--config file'
# during NM startup. This can be done by appending to DAEMON_OPTS in
# the file:
#
# /etc/default/NetworkManager
#
[main]
plugins=ifupdown,keyfile
#no-auto-default=00:1a:a0:53:a2:3f,
[ifupdown]
managed=false
和我的接口文件：
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 192.168.166.21
netmask 255.255.255.0
gateway 192.168.166.99
dns-nameservers 8.8.8.8 192.168.166.99