RHEL6上ssh -X打不开图形化窗口(Remote: No xauth program; cannot forward with spoofing.)

最新推荐文章于 2024-07-21 11:09:40 发布

最新推荐文章于 2024-07-21 11:09:40 发布 · 626 阅读

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本文探讨了在远程服务器上遇到图形界面无法打开的问题，通过安装xauth包解决了连接拒绝错误，最终成功在远程服务器上使用图形界面。

[root@localhost ~]# lsb_release -a
LSB Version: :core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor ID: RedHatEnterpriseServer
Description: Red Hat Enterprise Linux Server release 6.0 (Santiago)
Release: 6.0
Codename: Santiago

254装了图形化，168默认没装图形化，254 ssh -X到168，发现打不开图形界面，发现原因竟是168上少装了一个xauth的包。

strace xhost发现报如下错：

strace xhost +
...
connect(3, {sa_family=AF_INET, sin_port=htons(6000), sin_addr=inet_addr("10.100.0.254")}, 16) = -1 ECONNREFUSED (Connection refused)

...

ssh -vvv发现是xauth的问题：
ssh 10.100.0.168 -X -vvv
...
debug3: Wrote 512 bytes for a total of 2005
debug1: Remote: No xauth program; cannot forward with spoofing.
debug2: channel_input_status_confirm: type 99 id 0
...

安装xauth：

yum install xauth -y

再次-X登陆，注意最后一行，xauth在用户家目录下创建了一个.Xauthority的文件：

[root@401x Desktop]# ssh 10.100.0.168 -X
root@10.100.0.168's password:
Last login: Sun Aug 19 21:05:08 2012 from 10.100.0.254
/usr/bin/xauth: creating new authority file /root/.Xauthority

发现已经可以打开图形界面：

[root@localhost ~]# xclock
Warning: Missing charsets in String to FontSet conversion

回过头来看下ssh -vvv：

ssh 10.100.0.168 -X -vvv
...
debug3: Wrote 128 bytes for a total of 1381
debug2: callback start
debug2: x11_get_proto: /usr/bin/xauth list :0.0 2>/dev/null
debug1: Requesting X11 forwarding with authentication spoofing.
debug2: channel 0: request x11-req confirm 0
...

原本以为是xhost和DISPLAY变量设置的问题，结果发现与二者没有任何关系。

装了xauth后，168上的DISPLAY如下，xhost和DISPLAY变量都未做任何改动。

[root@localhost ~]# echo $DISPLAY
localhost:10.0

REF:

1. xhost doesn't work

http://forums.gentoo.org/viewtopic-t-424675-start-0.html

2. No xauth Program; Cannot Forward With Spoofing Error and Solution

http://www.cyberciti.biz/faq/linux-unix-appleosx-noxauth-program-cannot-forward-with-spoofing/