No xauth Program; Cannot Forward With Spoofing Error and Solution

by on June 15, 2011 · 1 comment· LAST UPDATED June 15, 2011

in

I want to use my local machine as the X server over ssh. But when I try to run ssh -X -v user@server1.example.com to the remote machine, I get the following error:

debug1: Remote: No xauth program; cannot forward with spoofing

How do I fix this problem and use X over ssh?

You need to have the xauth program installed on remote system. The xauth command is used to edit and display the authorization information used in connecting to the X server. You also need $HOME/.Xauthority default authority file.

Install xauth

Type the following command to install xauth under Fedora / RHEL / CentOS / Scientific / Red Hat Enterprise Linux:
# yum search xauth
# yum install xorg-x11-xauth

If you are using Debian / Ububtu Linux, enter:
$ sudo apt-get install xauth
The above command will install xauth and required libraries on the remote system. Now, you can connect using ssh as follows:
$ ssh -X user@s42.nixcraft.net.in
OR
$ ssh -X -C -c blowfish-cbc,arcfour user@s42.nixcraft.net.in

TwitterFacebookGoogle+PDF versionFound an error/typo on this page? Help us!

{ 1 comment… read it below or add one }

1 qchen2 August 5, 2013 at 4:10 am

Yes, “yum install xorg-x11-xauth.x86_64″ does resolve this issue on my CentOS 6.3(x86_64) machine.

Reply

Leave a Comment

Tagged as: , , , , , , , , , , , , ,

Previous Faq:

Next Faq: