linux无法显示网卡,UbuntuWireshark无法显示网卡解决办法

操作系统：Ubuntu Kylin 14.04 LTS

出现的问题：

Wireshark的Interface list下没有网卡可供抓包

问题原因：

Linux的网卡设备(例如eth0之类的网络设备)，直接访问需要 root权限。

解决办法：

⑴以root权限运行wireshark

但是，wireshark程序又有警告，说这个很危险！一想到，linux以root权限运行很多的程序会带来很多的麻烦(例如，rm -rf删除大量的文件夹等等)，所以果断放弃。

⑵以普通用户运行

一开始用了root权限运行wireshark，根据提示要求，找到了”/usr/share/doc/wireshark-common/README.Debian“文件

打开后，发现里面原来是有提供方法的。我就是按照里面的方法做的，并且解决了(以非root权限运行)

即：

dpkg-reconfigure wireshark-common

原文如下：(英文，因为这段英文比较简单，故不再翻译)

I. Capturing packets with Wireshark/Tshark

There are two ways of installing Wireshark/Tshark on Debian:

I./a. Installing dumpcap without allowing non-root users to capture packets

Only root user will be able to capture packets. It is advised to capture

packets with the bundled dumpcap program as root and then run

Wireshark/Tshark as an ordinary user to analyze the captured logs. [2]

This is the default on Debian systems.

I./b. Installing dumpcap and allowing non-root users to capture packets

Members of the wireshark group will be able to capture packets on network

interfaces. This is the preferred way of installation if Wireshark/Tshark

will be used for capturing and displaying packets at the same time, since

that way only the dumpcap process has to be run with elevated privileges

thanks to the privilege separation[1].

Note that no user will be added to group wireshark automatically, the

system administrator has to add them manually.

The additional privileges are provided using the Linux Capabilities

system where it is available and resort to setting the set-user-id bit

of the dumpcap binary as a fall-back, where the Linux Capabilities system

is not present (Debian GNU/kFreeBSD, Debian GNU/Hurd).

Linux kernels provided by Debian support Linux Capabilities, but custom

built kernels may lack this support. If the support for Linux

Capabilities is not present at the time of installing wireshark-common

package, the installer will fall back to set the set-user-id bit to

allow non-root users to capture packets.

If installation succeeds with using Linux Capabilities, non-root users

will not be able to capture packets while running kernels not supporting

Linux Capabilities.

Note that capturing USB packets is not enabled for non-root users by using

Linux Capabilities. You have to capture the packets using the method

described in I./a., setting the set-user-id permanently using

dpkg-statoverride or running Wireshark as root.

The installation method can be changed any time by running:

dpkg-reconfigure wireshark-common //就是这个，弄这个就好了

II. Installing SNMP MIBs

SNMP [4] OIDs can be decoded using MIBs provided by other packages.

wireshark-common suggests snmp-mibs-downloader which package can be used to

download a set of common MIBs Wireshark/Tshark tries to load at startup.

At the time of writing, MIBs are distributed under DFSG incompatible terms

[5] thus snmp-mibs-downloader has to be in the non-free archive area.

To keep wireshark in the main area [7], wireshark-common does not depend on

or recommend snmp-mibs-downloader and as a result snmp-mibs-downloader is

not installed automatically with wireshark.

To make Wireshark/Tshark able to decode OIDs, please install

snmp-mibs-downloader manually.

To help Wireshark/Tshark to decode OIDs without having to install packages

manually, please support the initiative of requesting additional rights

from RFC authors [5].

[1] http://wiki.wireshark.org/Development/PrivilegeSeparation

[2] http://wiki.wireshark.org/CaptureSetup/CapturePrivileges

[3] https://blog.wireshark.org/2010/02/running-wireshark-as-you

[4] http://wiki.wireshark.org/SNMP

[5] http://wiki.debian.org/NonFreeIETFDocuments

[6] http://www.debian.org/doc/debian-policy/ch-archive.html#s-non-free

[7] http://www.debian.org/doc/debian-policy/ch-archive.html#s-main

然后出现下图：选择”Yes/是“

打开wireshark，问题又来了，”/usr/bin/dumpcap“执行权限不够

所以，更改权限为所有用户拥有读写权利：

chmod 777 /usr/bin/dumpcap