Linux “X11 Connection Rejected Because of Wrong Authentication” Error and Solution
I have set up X desktop and want to connect to the X server through ssh. As you know ssh provides X forwarding which is a very useful feature and used a lot of system administrators.
Try To Connect Ssh X Forwarding
We will try to connect the X service of remote ssh server by providing -X parameter.
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$ ssh -X ubu1 |
OR
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$ nautilus |
Try To Connect Ssh X Forwarding
We get an error like “Unable to init server: Could not connect: Connection refused” or “/usr/bin/xauth: /home/ismail/.Xauthority not writable, changes will be ignored”
Change Ownership Of Xauthority
We will change Xauthority file ownership because it will be used by the current user to read and write.
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$ sudo chown ismail:ismail .Xauthority |
Change Ownership Of Xauthority
Check Disk If It Is Full
One of the root cause of a lot of problems is fulling disk. It is a hidden problem and generally does not show himself. We should all ways count this option for troubleshooting.
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$ df -lh |
df -lh
As we can see in the third line of output our root path have enough free space to run X
Check Ssh Server X Forwarding Setting
The ssh server configuration has a line X11Forwarding which enables or disable X11 forwarding. It may be disabled because of security reasons.
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$ cat /etc/ssh/sshd_config | grep X11Forwarding |
X11Forward
Check Ssh Client ForwardX11 Setting
The client-side of the ssh configuration also includes X11 forwarding. It shouldn’t be disabled or explicitly enabled like below.
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$ cat /etc/ssh/ssh_config | grep ForwardX11 |
Check Ssh Client ForwardX11 Setting
We should uncomment line ForwardX11 no and change to yes.
