Off topic:Centos 6.3 (Final) ETE: cannot connect to X server

Question

[Yang Li]

Hi, there

I used ETE to visualize the phylogenetic tree. The script worked at ubuntu 14.04 LTS (Desktop) but failed on remote server which ran Centos 6.3.

Here are the commands and returns:

python script

ETE: cannot connect to X server

I googled some methods and tested them

env DISPLAY=:0.0 python script
ETE: cannot connect to X server :0.0

On the official website I found the xvfb-run might be useful but....

xvfb-run python script
ETE: cannot connect to X server :99
/usr/bin/xvfb-run: line 186: kill: (23482) - No such process

xhost is my last choice

xhost +
xhost: unable to open display ""

I do not what to do next to solve my problem. Any help will be highly appreciated!