Wireshark · Ethereal-users: Re: [Ethereal-users] "cannot open display"

[Guy Harris <gharris@xxxxxxxxx>]

Adam McLaurin wrote:
> First of all, do other GUI's show up other than Ethereal?

E.g., can you run an xterm on the Unix server and make it display on the 
local machine?

> If not,
>
> a) Make sure your DISPLAY environment variable is pointing to your local
> X server.
>
> b) Make sure you actually have X11 forwarding enabled in your ssh
> client. In OpenSSH, the option is '-X'. In PuTTY, there's a GUI option
> for it.

Step b) isn't a requirement, although it's a convenience.