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Configure X11 Forwarding in CentOS/RHEL 6/7/8 and Fedora 28/29

X11 Forwarding will help you to run some GUI applications on a remote Sever. Like Firefox of Oracle installation of configuration and many other X11 apps. i will explain how to configure these settings from Windows Putty Client.

This Tutorials should work on all Centos/RHEL 7 and Fedora 28/29

Step 1: Install Required Packages
install all dependencies needed to run X11 applications

# yum install  xorg-x11-server-Xorg xorg-x11-xauth xorg-x11-apps -y
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Step 2: Enable X11 Fowarding Settings
This is an option to configure inside your SSHD Deamon settings.

# vim /etc/ssh/sshd_config
X11Forwarding yes

save and exit
Step 3: Restart SSH Service

The SSH service should be restarted to apply the change configuration.

For CentOS/RHEL 7/Fedora 28/29

# systemctl restart sshd

For CentOS/RHEL 6

# service sshd restart

A-Connect From Windows

Now lets try to connect via the most used ssh client PUTTY.

Enable X11 in Putty, before login.

Enable X11

Run below command to test the connection.

Please before to run any command ensure that X11 server is installed on ur windows Desktop for example Xming



# xeyes


  • How do we prevent the following error message when we run the command xclock?
Warning: Missing charsets in String to FontSet conversion
 Warning: Unable to load any usable fontset


Set the LC_ALL=C variable. As the user run:

 export LC_ALL=C

To make this setting permanent for user, add it to the .bash_profile of user:
In /home/User/.bash_profile

export LC_ALL

B-Connect From another Linux

My example is from my Mint Linux . ( Ubuntu Based)

Before to start, please install X11 Server tools x11-xserver-utils and run the commands bellow

$apt-get  install  x11-xserver-utils
$ssh -X osradar@remote-server

now you can run the applications

Please Enjoy and share !!

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