ssh -X -o options -A -p 22 user@centos-far-away-server
But, I am getting the following error on screen:
X11 forwarding request failed on channel 0
Last login: Sun Mar 23 15:58:51 2014 from 1.2.3.4
How do I fix "X11 forwarding request failed on channel 0" on Linux or Unix-like systems?


Tutorial details
Difficulty Intermediate (rss)
Root privileges Yes
Requirements None
Estimated completion time 5m

You may get an error when you try to display a server managment app or any other X app. You will be able to run a graphical application on server and get applications display (window) on your desktop using X11 forwarding. The fix this issue make sure OpenSSH SSHD is configured as followsFixing forwarding request failed on channel 0 on a Linux/Unix based server

Login to your centos-far-away-server, enter:
$ ssh -A -p 22 user@centos-far-away-server
Edit /etc/ssh/sshd_config file, enter:
$ sudo vi /etc/ssh/sshd_config
Set the following two options:

X11Forwarding yes
X11UseLocalhost no
Save and close the file. Reload the sshd, enter:
$ sudo /etc/init.d/sshd reload
Sample outputs:

Reloading sshd: [ OK ]
Install X authority file utility

You need to install xauth tool using yum command:
$ sudo yum install xauth
Sample outputs:


Loaded plugins: downloadonly, fastestmirror, security
Loading mirror speeds from cached hostfile
* base: mirrors.tummy.com
* epel: mirror.steadfast.net
* extras: centos-mirror.jchost.net
* updates: centos.hostingxtreme.com
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package xorg-x11-xauth.x86_64 1:1.0.2-7.1.el6 will be installed
--> Processing Dependency: libXmuu.so.1()(64bit) for package: 1:xorg-x11-xauth-1.0.2-7.1.el6.x86_64
--> Running transaction check
---> Package libXmu.x86_64 0:1.1.1-2.el6 will be installed
--> Processing Dependency: libXt.so.6()(64bit) for package: libXmu-1.1.1-2.el6.x86_64
--> Running transaction check
---> Package libXt.x86_64 0:1.1.3-1.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=================================================== ================================================== ======
Package Arch Version Repository Size
=================================================== ================================================== ======
Installing:
xorg-x11-xauth x86_64 1:1.0.2-7.1.el6 base 35 k
Installing for dependencies:
libXmu x86_64 1.1.1-2.el6 base 66 k
libXt x86_64 1.1.3-1.el6 base 184 k

Transaction Summary
=================================================== ================================================== ======
Install 3 Package(s)

Total download size: 285 k
Installed size: 681 k
Is this ok [y/N]: y
Downloading Packages:
(1/3): libXmu-1.1.1-2.el6.x86_64.rpm | 66 kB 00:00
(2/3): libXt-1.1.3-1.el6.x86_64.rpm | 184 kB 00:00
(3/3): xorg-x11-xauth-1.0.2-7.1.el6.x86_64.rpm | 35 kB 00:00
-----------------------------------------------------------------------------------------------------------
Total 1.2 MB/s | 285 kB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : libXt-1.1.3-1.el6.x86_64 1/3
Installing : libXmu-1.1.1-2.el6.x86_64 2/3
Installing : 1:xorg-x11-xauth-1.0.2-7.1.el6.x86_64 3/3
Verifying : libXmu-1.1.1-2.el6.x86_64 1/3
Verifying : libXt-1.1.3-1.el6.x86_64 2/3
Verifying : 1:xorg-x11-xauth-1.0.2-7.1.el6.x86_64 3/3

Installed:
xorg-x11-xauth.x86_64 1:1.0.2-7.1.el6

Dependency Installed:
libXmu.x86_64 0:1.1.1-2.el6 libXt.x86_64 0:1.1.3-1.el6

Complete!
Try ssh command as follows:
$ ssh -X -o options -A -p 22 user@centos-far-away-server
Sample outputs:

Last login: Sun Mar 23 16:25:09 2014 from 1.2.3.4
/usr/bin/xauth: creating new authority file /home/vivek/.Xauthority
Once you got ~/.Xauthority file, you can run X apps as follows over ssh:
$ xeyes &
$ my-cool-raid-app-manager &
Tip: Finding issues with X over ssh

If you still need hints, run ssh command as follows to debug problems:
$ ssh -v user@server-name-here
GarryField Reviewed by GarryField on . X11 forwarding request failed on channel 0 Error and Solution ssh -X -o options -A -p 22 user@centos-far-away-server But, I am getting the following error on screen: How do I fix "X11 forwarding request failed on channel 0" on Linux or Unix-like systems? Tutorial details Rating: 5