ssh -X

[nicksunyang]

when I use ssh -X
then error occurred
i input xclock
Error: Can't open display:

[WSLUser]

That's due to Windows not having a X server. If you look at the ssh(1) from the Linux man page. You'll see

-X' Enables X11 forwarding. This can also be specified on a per-host basis in a configuration file.

X11 forwarding should be enabled with caution. Users with the ability to bypass file permissions on the remote host (for the user's X authorization database) can access the local X11 display through the forwarded connection. An attacker may then be able to perform activities such as keystroke monitoring.
For this reason, X11 forwarding is subjected to X11 SECURITY extension restrictions by default. Please refer to the ssh -Y option and the ForwardX11Trusted directive in ssh_config(5) for more information.

-x' Disables X11 forwarding.

Install a third party X server such as VcxSrv or X410 and then use it with something that can work with it such as WSL.

[nicksunyang]

but when I use 'ssh -X' to connect remote linux, then
echo $DISPLAY
DISPLAY=none
PS C:\Users\SUNYY> ssh -Y [email protected] -p 10022
[email protected]'s password:
Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.4.0-62-generic x86_64)

• Documentation: https://help.ubuntu.com
• Management: https://landscape.canonical.com
• Support: https://ubuntu.com/advantage

Last login: Sun Sep 1 09:57:49 2019 from 10.180.8.164
sunyy@ImageLab:~$ echo $DISPLAY

sunyy@ImageLab:~$ gvim
gvim: /home/sunyy/anaconda3/lib/libuuid.so.1: no version information available (required by /usr/lib/x86_64-linux-gnu/libSM.so.6)
E233: cannot open display

Press ENTER or type command to continue
and meanwhile
when I open xshell to login
DISPLAY=localhost:10.0
then I input gvim in powershell ,it works.
Connecting to 10.212.45.147:10022...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.

Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.4.0-62-generic x86_64)

• Documentation: https://help.ubuntu.com
• Management: https://landscape.canonical.com
• Support: https://ubuntu.com/advantage

Last login: Sun Sep 1 10:20:04 2019 from 10.180.8.164
sunyy@ImageLab:$ echo $DISPLAY
localhost:10.0
sunyy@ImageLab:$ gvim
gvim: /home/sunyy/anaconda3/lib/libuuid.so.1: no version information available (required by /usr/lib/x86_64-linux-gnu/libSM.so.6)
sunyy@ImageLab:~$

Vcxsrc is opend all the time.

Why doesn't it work like xshell or in Mac?

[nicksunyang]

when xshell keeps on
in powershell I input
export DISPLAY=localhost:11.0
gvim works
sunyy@ImageLab:$ export DISPLAY=localhost:11.0
sunyy@ImageLab:$ gvim
gvim: /home/sunyy/anaconda3/lib/libuuid.so.1: no version information available (required by /usr/lib/x86_64-linux-gnu/libSM.so.6)
sunyy@ImageLab:~$

[nicksunyang]

There is no ssh configuration file on Windows
The program may be missing some features。

[WSLUser]

Did you install using the built-in feature or from the Release Page? Keep in mind that the Release page can contain a newer version than your OS has available. I suggest uninstalling the feature and install from Github instead. You can automate this install with Chocolatey if you use it.

Also, the install won't create the config file. It is generated when you ssh. There is plenty of documentation to manually create it for Windows.

[nicksunyang]

I use Chocolatey to install openssh , then input ssh -X or ssh -Y , it's still invalid. Could you give a tutorial?

[manojampalam]

Haven't explored X11 forwarding on Windows yet. Its currently not in scope. If you feel its an easy feature to add, please propose on how it could be done. A PR with changes would be helpful.

[nicksunyang]

I solve the issue,
my local host ip : 10.212.45.145
remote host ip: 10.212.45.138
then i open powershell and input:
ssh -Y [email protected] -p 10022
next , open xlaunch, set display number : 0, enable Disable access control
in the remote machine shell input
export DISPLAY=10.212.45.145:0
gvim
it works.