Linux/Ubuntu2012. 2. 10. 21:56
로컬에서 접속하면 putty로 접속을 하면 10.0 이 뜨는데
혹시나 해서 ssh에서 동일하게 설정을 하면 서버측의 X로 출력을 보낼수 있다.
 $ export DISPLAY=:0.0

localhost:0.0 으로 하면 안되고, :0.0 으로 해야만 되서 왜 그러나 해서 찾아봤는데
가장 효율적인 접속을 할 수 있는 경로로 접속한다고 한다.
추가내용을 보니, hostname을 비워두면 local로 접속하는데 TCP 소켓이 아닌 로컬 소켓등으로 접속을 하는 것으로 보인다.

Display Names

From the user's perspective, every X server has a display name of the form:

hostname:displaynumber.screennumber

This information is used by the application to determine how it should connect to the server and which screen it should use by default (on displays with multiple monitors):

hostname
The hostname specifies the name of the machine to which the display is physically connected. If the hostname is not given, the most efficient way of communicating to a server on the same machine will be used.

X servers listen for connections on a variety of different communications channels (network byte streams, shared memory, etc.). Since there can be more than one way of contacting a given server, The hostname part of the display name is used to determine the type of channel (also called a transport layer) to be used. X servers generally support the following types of connections: 

local

The
hostname part of the display name should be the empty string. For example: :0:1, and :0.1. The most efficient local transport will be chosen.
TCP/IP

The hostname part of the display name should be the server machine's IP address name. Full Internet names, abbreviated names, and IP addresses are all allowed. For example: x.org:0expo:0198.112.45.11:0bigmachine:1, and hydra:0.1.

[링크 : http://linux.die.net/man/7/x
[링크 : http://www.linuxquestions.org/questions/linux-newbie-8/export-display%3D-0-0-a-682926/

따.. 딱히 귀찮아서 찾은건 아니야!
Posted by 구차니