Wireshark · Wireshark-users: Re: [Wireshark-users] can't capture on my linux

[Guy Harris <guy@xxxxxxxxxxxx>]

On Feb 2, 2009, at 7:38 PM, Condor Kim wrote:

> Hello everyone. i installed wireshark /ethereal on my little asus  
> eee pc with linux xandros. however, when i start wireshark, and open  
> "options" under "capture", i see no listing in the "interface" drop  
> down list. i then typed the command "wireshark -D" and i got the  
> response "there is no interfaces on which capture can be done"????
>
> what do i do?

Type "sudo tcpdump -D" and see what it does.

If it doesn't let you do "sudo", type "su" and, when you get a root  
prompt after typing the root password, type "tcpdump -D" and see what  
it does.

If it lists some or all of the adapters, try running Wireshark as  
root.  Capturing packets tends to require root privileges by default;  
making the "dumpcap" program installed as part of wireshark set-UID  
root could help (so you don't have to run a big program such as  
Wireshark or TShark as root).