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我正在尝试设置 x11 转发来监控嵌入式机器人平台上的视频，但我似乎无法让电路板生成图形输出。我在直接通过以太网连接的 Beagleboard xM 上运行 Arch Linux（不过，我计划在未来使用 WiFi）。当我尝试设置 DISPLAY 变量时，它会接受它，但是当我尝试运行 x11 应用程序时会说：

(Object:287): Gtk-WARNING **: cannot open display: [displaynamehere]

显然 [displaynamehere] 是我试图设置为显示的任何内容，但似乎没有显示位置起作用。奇怪的是，每当我通过 ssh -X 连接时，它不会给我任何错误，也不会保存我的 DISPLAY 变量。

（编辑）我还检查了调试日志并得到了这个输出：

debug2: load_server_config: filename /etc/ssh/sshd_config
debug2: load_server_config: done config len = 315
debug2: parse_server_config: config /etc/ssh/sshd_config len 315
debug3: /etc/ssh/sshd_config:53 setting AuthorizedKeysFile .ssh/authorized_keys
debug3: /etc/ssh/sshd_config:75 setting ChallengeResponseAuthentication no
debug3: /etc/ssh/sshd_config:96 setting UsePAM yes
debug3: /etc/ssh/sshd_config:101 setting X11Forwarding yes
debug3: /etc/ssh/sshd_config:104 setting PrintMotd no 
debug3: /etc/ssh/sshd_config:108 setting UsePrivilegeSeparation sandbox     
debug3: /etc/ssh/sshd_config:124 setting Subsystem sftp /usr/lib/ssh/sftp-server
debug1: sshd version OpenSSH_6.3, OpenSSL 1.0.1e 11 Feb 2013
debug3: Incorrect RSA1 identifier
debug1: read PEM private key done: type RSA
debug3: Incorrect RSA1 identifier
debug3: Could not load "/etc/ssh/ssh_host_rsa_key" as a RSA1 public key
debug1: private host key: #0 type 1 RSA
debug3: Incorrect RSA1 identifier
debug1: read PEM private key done: type DSA
debug3: Incorrect RSA1 identifier
debug3: Could not load "/etc/ssh/ssh_host_dsa_key" as a RSA1 public key
debug1: private host key: #1 type 2 DSA
debug3: Incorrect RSA1 identifier
debug1: read PEM private key done: type ECDSA
debug3: Incorrect RSA1 identifier
debug3: Could not load "/etc/ssh/ssh_host_ecdsa_key" as a RSA1 public key
debug1: private host key: #2 type 3 ECDSA
debug1: rexec_argv[0]='/usr/bin/sshd'
debug1: rexec_argv[1]='-ddd'
debug3: oom_adjust_setup
Set /proc/self/oom_score_adj from 0 to -1000
debug2: fd 3 setting O_NONBLOCK
debug1: Bind to port 22 on 0.0.0.0.
Bind to port 22 on 0.0.0.0 failed: Address already in use.
debug2: fd 3 setting O_NONBLOCK
debug3: sock_set_v6only: set socket 3 IPV6_V6ONLY
debug1: Bind to port 22 on ::.
Server listening on :: port 22.

任何建议将不胜感激，我已经在谷歌上尝试了将近一周，但无济于事。

非常感谢！

4

3 回答 3

35

On the server

Edit /etc/ssh/sshd_config:

AllowAgentForwarding yes
AllowTcpForwarding yes
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost no

Restart the sshd daemon:

sudo service sshd restart
# or
sudo /etc/init.d/ssh restart
# or whatever way of restarting your box services works on your distro...

Install the packages (Ubuntu/Debian):

apt-get -y update
apt-get -y install xauth

Install the packages (RHEL/CentOS):

yum -y update
yum -y install xauth

Now exit the server:

exit

On the client

Set the DISPLAY environment variable locally:

export DISPLAY=:0.0

and start a trusted SSH connection to the server:

ssh -Y $ssh_user@$ssh_server

Verify success with a graphical app. Install an app supporting X11 forwarding, if needed. As an example:

yum -y install xclock

and action:

for i in {1..3} ; do bash -c "xclock &" ; done ;
于 2014-04-12T16:26:08.200 回答
3

每当我遇到这个问题时，几乎总是要遵循两个选项，我认为您应该在对配置进行任何进一步更改（例如设置 DISPLAY 等）之前将它们设置如下。

X11Forwarding yes
X11UseLocalhost no
于 2015-02-17T10:39:06.457 回答
2

ssh 应该自动设置 DISPLAY。通常的嫌疑人：在 /etc/ssh/sshd_config 中缺少“X11Forwarding yes”

要调试，您可以在客户端和服务器上运行详细模式，您可能会注意到一些事情：在“服务器”端尝试（调试模式，无守护程序）

$ /usr/sbin/sshd -d -p 222

在“客户”上：

$ ssh -v -Y phil@192.168.0.14 -p 222

偶尔我会遇到一个奇怪的事情，比如'missing xauth'......

于 2014-02-07T01:58:50.840 回答