In Linux, wireshare cannot find the NIC. Solution

Tested and available

Ubuntu12.04 I used

Install wireshare directly in the software library

When the software is turned on, the network card cannot be found, and the network card says the permission is insufficient. The solution is as follows:

Translation from http://packetlife.net/blog/2010/mar/19/sniffing-wireshark-non-root-user/

This article introduces the methods in Linux. When Windows users start Wireshark for the first time in Linux by referring to Wireshark's wiki, they may wonder why they cannot see any network adapter, such as eth0. This is because direct access to these devices requires
Root permission. Then, I used the root permission. Of course, this is a bad practice. For example, in Gentoo, the system will prompt Wireshark contains over one point five million lines of source code. Do not run them as root. What should I do? Leader Gerald combs of Wireshark pointed out that most Linux distributions are now using raw network devices. You can use this method to start Wireshark from common users. The procedure is as follows:

1. Install setcap. Setcap is part of the libcap2-bin package, which is installed by default.

Sudo apt-Get install libcap2-bin

2. Create a Wireshark group. This step is also completed when Wireshark is installed.

# Groupadd-G Wireshark
# Usermod-a-g wireshark <User Name>
# Chgrp Wireshark/usr/bin/dumpcap
# Chmod 4750/usr/bin/dumpcap 3. grant permissions.

# Setcap cap_net_raw, cap_net_admin = EIP/usr/bin/dumpcap complete.

You can use getcap/usr/bin/dumpcap for verification. The output should be:/usr/bin/dumpcap = cap_net_admin, cap_net_raw + EIP.
Now, you can start Wireshark packet capture from your normal users.