使用ubuntu自带的网络连接下使用DSL进行PPPOE网络连接没有反应。编辑连接里面显示该连接从未被使用。也没有反馈错误原因。
如何解决。

請先參閱
https://help.ubuntu.com/stable/ubuntu-h ... nnect.html
如果還未解決
把下面指令 複製 貼進終端機 執行
0. uname -r
1. sudo lspci -knn
2. sudo lshw -numeric -class network
3. sudo ifconfig -a
4. sudo route -nv
5. sudo dhclient -v
6. sudo cat /etc/resolv.conf
把結果直接 選取/複製/貼上來
不必擷圖

网络可以正常使用。连接校内网需要PPPOE拨号。DSL不能正常使用。
系统是15.04
内核是3.19.0-15-generic
网卡是正常的。不拨号的时候是可惜获取IP和路由表的
zshongyi@zshongyi-ThinkPad-E420:~$ sudo dhclient -v
Internet Systems Consortium DHCP Client 4.3.1
Copyright 2004-2014 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/eth0/f0:de:f1:59:16:65
Sending on LPF/eth0/f0:de:f1:59:16:65
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0x2067fdca)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6 (xid=0x2067fdca)
DHCPREQUEST of 10.70.10.183 on eth0 to 255.255.255.255 port 67 (xid=0x2067fdca)
DHCPOFFER of 10.70.10.183 from 10.70.8.1
DHCPACK of 10.70.10.183 from 10.70.8.1
bound to 10.70.10.183 -- renewal in 110442 seconds.
zshongyi@zshongyi-ThinkPad-E420:~$ sudo cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 255.255.255.255
nameserver 172.19.85.1
nameserver 202.101.172.46
search workgroup

摘要
可能會遺漏重要訊息

~$ uname -r
3.19.0-15-generic
~$ udo lspci -knn
udo: unknown option! -knn
Error: 0: couldn't open source file <lspci.ui>
lspci.ui: No such file or directory
~$ sudo lshw -numeric -class network
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10EC:8168]
vendor: Realtek Semiconductor Co., Ltd. [10EC]
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 06
serial: f0:de:16:65:f1:59
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8168e-2.fw ip=10.70.9.23 latency=0 link=yes multicast=yes port=MII speed=10Mbit/s
resources: irq:25 ioport:5000(size=256) memory:e0404000-e0404fff memory:e0400000-e0403fff
*-network
description: Wireless interface
product: RTL8188CE 802.11b/g/n WiFi Adapter [10EC:8176]
vendor: Realtek Semiconductor Co., Ltd. [10EC]
physical id: 0
bus info: pci@0000:09:00.0
logical name: wlan0
version: 01
serial: 68:a3:4a:d1:c4:7f
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8192ce driverversion=3.19.0-15-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:19 ioport:3000(size=256) memory:e1d00000-e1d03fff
~$ sudo ifconfig -a
eth0 Link encap:以太网 硬件地址 f0:de:16:65:f1:59
inet 地址:10.70.9.23 广播:10.70.11.255 掩码:255.255.252.0
inet6 地址: fe80::f2de:f1ff:fe59:1665/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 跃点数:1
接收数据包:14 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:211 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:2538 (2.5 KB) 发送字节:27265 (27.2 KB)

lo Link encap:本地环回
inet 地址:127.0.0.1 掩码:255.0.0.0
inet6 地址: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 跃点数:1
接收数据包:7341 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:7341 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:0
接收字节:1020755 (1.0 MB) 发送字节:1020755 (1.0 MB)

wlan0 Link encap:以太网 硬件地址 68:a3:4a:d1:c4:7f
UP BROADCAST MULTICAST MTU:1500 跃点数:1
接收数据包:1218171 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:1069460 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:1284470437 (1.2 GB) 发送字节:464699783 (464.6 MB)

~$ sudo route -nv
内核 IP 路由表
目标 网关 子网掩码 标志 跃点 引用 使用 接口
0.0.0.0 10.70.8.1 0.0.0.0 UG 1024 0 0 eth0
10.70.8.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
~$ sudo dhclient -v
Internet Systems Consortium DHCP Client 4.3.1
Copyright 2004-2014 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/eth0/f0:de:16:65:f1:59
Sending on LPF/eth0/f0:de:16:65:f1:59
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0x2b0f4162)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 (xid=0x2b0f4162)
DHCPREQUEST of 10.70.11.215 on eth0 to 255.255.255.255 port 67 (xid=0x2b0f4162)
DHCPOFFER of 10.70.11.215 from 10.70.8.1
DHCPACK of 10.70.11.215 from 10.70.8.1
sudo cat /etc/resolv.conf
bound to 10.70.11.215 -- renewal in 123484 seconds.
~$ sudo cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 255.255.255.255
nameserver 172.19.85.1
nameserver 202.101.172.46
search workgroup

抱歉 應該是
sudo lspci -knn

r8169 不是合適的驅動
參見
http://unixblogger.wordpress.com/2011/1 ... rnet-card/
http://askubuntu.com/questions/346685/w ... controller
viewtopic.php?p=3116001#p3116001

安裝合適驅動後 再試一次

驱动已经重新安装。但是PPPOE拨号的问题依旧没用解决
ThinkPad-E420:/home/zshongyi# uname -r
3.19.0-15-generic
ThinkPad-E420:/home/zshongyi#
ThinkPad-E420:/home/zshongyi# lspci -knn
00:00.0 Host bridge [0600]: Intel Corporation 2nd Generation Core Processor Family DRAM Controller [8086:0104] (rev 09)
Subsystem: Lenovo Device [17aa:21e2]
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port [8086:0101] (rev 09)
Kernel driver in use: pcieport
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09)
Subsystem: Lenovo Device [17aa:21e3]
Kernel driver in use: i915
00:16.0 Communication controller [0780]: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 [8086:1c3a] (rev 04)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: mei_me
00:1a.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 04)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: ehci-pci
00:1b.0 Audio device [0403]: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller [8086:1c20] (rev 04)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 [8086:1c10] (rev b4)
Kernel driver in use: pcieport
00:1c.1 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 [8086:1c12] (rev b4)
Kernel driver in use: pcieport
00:1c.2 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 [8086:1c14] (rev b4)
Kernel driver in use: pcieport
00:1c.3 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 [8086:1c16] (rev b4)
Kernel driver in use: pcieport
00:1c.7 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 [8086:1c1e] (rev b4)
Kernel driver in use: pcieport
00:1d.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 [8086:1c26] (rev 04)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge [0601]: Intel Corporation HM65 Express Chipset Family LPC Controller [8086:1c49] (rev 04)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: lpc_ich
00:1f.2 IDE interface [0101]: Intel Corporation 6 Series/C200 Series Chipset Family 4 port SATA IDE Controller [8086:1c01] (rev 04)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: ata_piix
00:1f.3 SMBus [0c05]: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller [8086:1c22] (rev 04)
Subsystem: Lenovo Device [17aa:21e2]
00:1f.5 IDE interface [0101]: Intel Corporation 6 Series/C200 Series Chipset Family 2 port SATA IDE Controller [8086:1c09] (rev 04)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: ata_piix
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] [1002:6741]
Subsystem: Lenovo Device [17aa:21e3]
Kernel driver in use: fglrx_pci
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: r8168
04:00.0 System peripheral [0880]: Ricoh Co Ltd MMC/SD Host Controller [1180:e822] (rev 07)
Subsystem: Lenovo Device [17aa:21e2]
Kernel driver in use: sdhci-pci
09:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8195]
Kernel driver in use: rtl8192ce
ThinkPad-E420:/home/zshongyi#
ThinkPad-E420:/home/zshongyi# lshw -numeric -class network
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10EC:8168]
vendor: Realtek Semiconductor Co., Ltd. [10EC]
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 06
serial: f0:de:16:65:f1:59
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.039.00-NAPI duplex=half ip=10.70.0.140 latency=0 link=yes multicast=yes port=twisted pair speed=10Mbit/s
resources: irq:25 ioport:5000(size=256) memory:e0404000-e0404fff memory:e0400000-e0403fff
*-network
description: Wireless interface
product: RTL8188CE 802.11b/g/n WiFi Adapter [10EC:8176]
vendor: Realtek Semiconductor Co., Ltd. [10EC]
physical id: 0
bus info: pci@0000:09:00.0
logical name: wlan0
version: 01
serial: 68:a3:4a:d1:c4:7f
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8192ce driverversion=3.19.0-15-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:19 ioport:3000(size=256) memory:e1d00000-e1d03fff
ThinkPad-E420:/home/zshongyi#
ThinkPad-E420:/home/zshongyi# ifconfig -a
eth0 Link encap:以太网 硬件地址 f0:de:16:65:f1:59
inet 地址:10.70.0.140 广播:10.70.3.255 掩码:255.255.252.0
inet6 地址: fe80::f2de:f1ff:fe59:1665/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 跃点数:1
接收数据包:18 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:487 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:3910 (3.9 KB) 发送字节:57433 (57.4 KB)
中断:25 基本地址:0x4000

lo Link encap:本地环回
inet 地址:127.0.0.1 掩码:255.0.0.0
inet6 地址: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 跃点数:1
接收数据包:443 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:443 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:0
接收字节:36739 (36.7 KB) 发送字节:36739 (36.7 KB)

wlan0 Link encap:以太网 硬件地址 68:a3:4a:d1:c4:7f
UP BROADCAST MULTICAST MTU:1500 跃点数:1
接收数据包:19 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:104 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:3540 (3.5 KB) 发送字节:17457 (17.4 KB)

ThinkPad-E420:/home/zshongyi#
ThinkPad-E420:/home/zshongyi# route -nv
内核 IP 路由表
目标 网关 子网掩码 标志 跃点 引用 使用 接口
0.0.0.0 10.70.0.1 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 10.70.0.1 0.0.0.0 UG 1024 0 0 eth0
10.70.0.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0
10.70.0.1 0.0.0.0 255.255.255.255 UH 1024 0 0 eth0
ThinkPad-E420:/home/zshongyi#
ThinkPad-E420:/home/zshongyi# dhclient -v
Internet Systems Consortium DHCP Client 4.3.1
Copyright 2004-2014 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Corrupt lease file - possible data loss!
Listening on LPF/eth0/f0:de:16:65:f1:59
Sending on LPF/eth0/f0:de:16:65:f1:59
Sending on Socket/fallback
DHCPREQUEST of 10.70.0.140 on eth0 to 255.255.255.255 port 67 (xid=0x790feb00)
DHCPACK of 10.70.0.140 from 10.70.0.1
RTNETLINK answers: File exists
bound to 10.70.0.140 -- renewal in 105839 seconds.
ThinkPad-E420:/home/zshongyi#
ThinkPad-E420:/home/zshongyi# cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 255.255.255.255
nameserver 211.140.188.188
nameserver 211.140.13.188

1. r8168 驅動模組 安裝 還有瑕疵 完整安裝後 應該是 duplex=full

2. 這一篇 針對 Ubuntu 15.04 看看能否幫你
http://askubuntu.com/a/611361/198920

网卡的全双工和半双工目前是自动协商的，不应当是网卡的问题。网卡支持全双工
ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: Unknown!
Duplex: Half
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: no

可以強制改變為 Duplex: Full
1. 如果你是在 右上方 NM-Applet 圖示設定 DSL
http://askubuntu.com/questions/100988/h ... a-particul
2. 如果你是在 /etc/network/interfaces 設定 PPPOE
https://help.ubuntu.com/lts/serverguide ... interfaces

Speed: 10Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: off
MDI-X: Unknown
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: yes


就算是关了自动协商也没有用，应该是network-manager的问题

1. 大膽假設 可以
然後 需要小心求證
viewtopic.php?p=3131920#p3131920

2. 把無線網卡關閉
再一次
sudo ifconfig -a
看看有沒有 ppp 界面

3. 看看 這一篇 有沒有幫上忙
http://askubuntu.com/a/319887/198920
DSL through pppoeconf works but through Network Manager stops some sites from loading in browsers?

4. 如果還是沒有幫上忙
把下面指令 複製 貼進終端機 執行
4-1. sudo cat /etc/NetworkManager/NetworkManager.conf
4-2. sudo cat /etc/network/interfaces
把結果直接 選取/複製/貼上來

5. 建議
向 校内网 網管人員 請教設定細節

检查了系统的日志发现链接pppoe时出现的错误
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) starting connection '求真内网'
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started...
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> (eth0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting...
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> (eth0): device state change: prepare -> config (reason 'none') [40 50 0]
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful.
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete.
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> (eth0): device state change: config -> ip-config (reason 'none') [50 70 0]
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <warn> (eth0): PPPoE failed to start: Could not find pppoe binary.
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> (eth0): device state change: ip-config -> failed (reason 'ppp-start-failed') [70 120 12]
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <warn> Activation (eth0) failed for connection '求真内网'
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> (eth0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> (eth0): deactivating device (reason 'none') [0]
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Auto-activating connection '默认以太网连接'.
Apr 30 14:06:10 zshongyi-ThinkPad-E420 NetworkManager[1136]: <info> Activation (eth0) starting connection '默认以太网连接'

这是什么情况，我没有装pppoe?

1. Ubuntu 可以在 /etc/network/interfaces 設定 pppoeconf
也可以在 NM-Applet 設定 DSL
但是 避免重複
意思是 在 NM-Applet 設定 DSL 就需要 把 /etc/network/interfaces 的 pppoeconf 設定移除


2. 比較可能是
你在 NM-Applet 沒有充分 把 /etc/network/interfaces 關於 pppoeconf 的設定參數
全部正確添入 NM-Applet

root@zshongyi-ThinkPad-E420:/home/zshongyi# cat /etc/NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false
root@zshongyi-ThinkPad-E420:/home/zshongyi# cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
root@zshongyi-ThinkPad-E420:/home/zshongyi#

在network-manager管理没有成功的情况下，我尝试修改了interfaces来进行拨号链接，同样也是失败的。造成network-manager显示设备未托管，随后手动修改上上面的两个文件。
查询了一下pppoe二进制文件不存在的问题，有反馈说是PPPOE程序安装补全，可能缺少re-pppoe这个软件。但是我的软件仓库中无法找到。