I can start Xclock and it's displayed immediately on my Windows laptop. I can start xclock on another system with X11Forwarding no in sshd_config and without using -X, as long as I set the DISPLAY variable correctly. Though it says application started when I run this bash script doesn't show up any GUI. Authorization required, but no authorization protocol specified Error: Can't open display: franklinyu-windows:0.0 February 26, 2020 at 12:48 am After I open this program for a while, and try to exit, it informs me that certain number (4 to 8) clients connected. bash-3.2# xterm Doesn't matter if I log in with -X or -Y. I get the "Error: Can't open display" message. I started xclock to test; it complained that DISPLAY is not set: Error: Can't open display: I manually set export DISPLAY=franklinyu-windows:0.0, then xclock said. Error: Can’t open display: localhost:10.0 RESOLUTION: [a] You have done an su or a sudo to a switch user, without copying the correct MIT-MAGIC-COOKIE authentication. Reply. Linux OS - Version Oracle Linux 5.0 and later: Error "Can't open display: localhost:x.y" When Running xclock on Xming If the variable isn't set, you aren't getting X forwarding. Try that and see if that helps. -rw-r--r-- 1 root root 146 Oct 10 15:00 hosts [[email protected] etc]# cat hosts # Do not remove the following line, or various programs # that require network functionality will fail. xclock command gives Cannot convert string output [root]# xclock I can't promise it isn't something else to do with the sshd config, or the X server config, but this is not the issue. I just get the standard error: [email protected]:~# export DISPLAY=:0.0 [email protected]:~# xeyes Error: Can't open display: :0.0 Categories LINUX Tags can't open display, cannot open display: :0.0, XCLOCK not working with oracle user Post navigation E: package has no installation candidate how to: convert pfx to jks Error: Can’t open display: localhost:10.0. Therefore, I followed these instructions (installed Xming, connecting via PuTTY) and advice from linked articles (not using PuTTY), and got nowhere. However, running xclock or xterm on the HP-UX B.11.23 U ia64 computer has these errors: bash-3.2# xclock Error: Can't open display: Error: Couldn't find per display information. The Red Hat Customer Portal delivers the knowledge, expertise, and guidance available through your Red Hat subscription. Running xclock gives me the following error: "Error: Can't open display: localhost:10.0". 7 comments: Can't seem to launch xeyes as a test despite having X11 installed and both export DISPLAY=:0.0 and export DISPLAY=:0 do not work. Share to Twitter Share to Facebook Share to Pinterest. xclock command gives Can't open display output [root]# xclock . Things were working fine previously, so I assume this is something specific to 10.5.7. To get access to the X client applications such as system-config-date, xclock, vncviewer we need to export the DISPLAY settings of a remote host to the local server. Posted by yanb at 1:06 PM. I have been testing mostly by trying to run xclock. After opening ssh connection to the remote host as explained above, you can open any GUI application which will open it without any issue. 3 Replies Latest reply on Oct 13, 2009 11:10 AM by Deepak_DBA Latest reply on Oct 13, 2009 11:10 AM by Deepak_DBA I can run xclock or xterm on the RHEL4 linux computer. If you didn't delete it, you can use it to update the entire Cygwin suite, and/or to choose the parts of Cygwin you want installed. Don't set DISPLAY.Never set DISPLAY over SSH (including PuTTY): if the SSH forwarding is working, the environment variable will be set correctly. 127.0.0.1 localhost.localdomain localhost [[email protected] etc]# cat hosts.allow # # hosts.allow This file describes the names of the hosts which are Re: xhost + error: unable to open display Hi Jagadesh, xhost + can only running on XWindows mode so use Telnet application that support XWindows such as ReflectionX from WRQ inc.After install that telnet software you can run xhost + without any difficulties. – goldilocks ♦ Jun 1 '15 at 19:55 Complete sshd_config below: bash-3.2# xterm xterm Xt error: Can't open display: %s. ERROR MESSAGE FOR GEDIT: (gedit:3058): Gtk-WARNING **: cannot open display: localhost:10.0 If you still get the “cannot open display” error, set the DISPLAY variable as shown below. hi, I'm trying to run a bash script that starts GUI. I can ssh -X to a RHEL4 linux and a HP-UX B.11.23 U ia64 computer from a FC6 linux computer. I'm pretty sure Xming isn't the problem, since if I manually change the DISPLAY variable to "[my windows machine IP]:0.0", I can run xclock and see it appear. I have heard that I can use "X11 forwarding" (whatever that means) to display graphics generated on a remote server on my local machine. ... Run xclock, and you should see the clock on your Windows box. You will not be able to display graphics on the screen. hi, i´m doing every step but when i run the xeyes comand in bash it says: Error: Can’t open display: localhost:0.0 maybe i missed somethig, please help. I tried to set it to localhost:10.0 and I get: Error: Can't open display: localhost:10.0 I've tried :0.0 and I get: Invalid MIT-MAGIC-COOKIE-1 keyError: Can't open display: :0.0 ssh used to work about a week ago before I performed various security updates. However, in some cases you may need to start a graphical application like nedit or firefox in a sudo or su context. here are my parameters: windows 7 laptop: putty for simple ssh connection => OK putty param 'enable X11 forwarding' => checked putty param 'X display location' => localhost:0.0 aws config: VPC with subnet allowing SSH connections => tested successfully sudo cat /etc/ssh/sshd_config |grep -i x11 #X11Forwarding no I am trying to run xclock on newly built solaris box[Solaris 10 11/06 s10x_u3wos_10 X86] - These are the steps I followed: # DISPLAY=localhost:0.0 # export DISPLAY # xclock xclock: not found # cd /usr/openwin/bin # ./xclock Error: Can't open display: localhost:0.0 # Please suggest, what am i doing wrong? I tried to set it to localhost:10.0 and I get: Error: Can't open display: localhost:10.0 I've tried :0.0 and I get: Invalid MIT-MAGIC-COOKIE-1 keyError: Can't open display: :0.0 ssh used to work about a week ago before I performed various security updates. [[email protected] eclipse]$ xclock X11 connection rejected because of wrong authentication. Quick Solution: Login directly with user on which you want to use xclock. bash-3.2# sshd -version sshd: illegal option -- v If you set localhost:0 as "X display location" option in Putty, you should also check that Xming is running on display :0.Xming and Putty display option must have the same value. Re: [Solved] Xforwarding with ssh: Can't open display localhost 10.0 I always had to do 'xhost +' w/out quotes on the client machine. Posted on December 26, 2012 Less than a 1 minute read. Re: xterm Xt error: Can't open display: %s urgent When you clicked the "install Cygwin/X from here", you received the setup.exe for the Cygwin package. Here is what I've tried so far and please let me know if I'm missing something with the X11 set up here. Error: Can't open display: localhost:10.0-> probably you are missing xorg-x11-xauth fix it by [root]# yum install xorg-x11-xauth. John. Follow RSS feed Like $ export DISPLAY='IP:0.0' Resolve error Can’t open display on AIX. X11-forwarding mechanism does not allow anyone to use the open display. Whenever I try to run an application, like xterm & or xclock I get the same error: PuTTY X11 proxy: Unsupported authorisation protocol Error: Can't open display: localhost:10.0 I've combed the Internet and found a number of other people reporting the same … ForwardX11 yes is set on each machine. However, running xclock or xterm on the HP-UX B.11.23 U ia64 computer has these errors: bash-3.2# xclock Error: Can't open display: Error: Couldn't find per display information. This discussion is archived. But i can't make it work ??!! Thank you! From what I can see, it should be working. I can run xclock or xterm on the RHEL4 linux computer. Error: Can't open display: localhost:10.0 You haven't allowed X sessions on the local system by running "xhost +", and until you can run xclock, things won't proceed so there's not much point in going further. The following procedure allows a sudo user to use the ssh based X11 tunnel. ERROR MESSAGE FOR XCLOCK: Error: Can't open display: localhost:10.0 ERROR MESSAGE FOR MATLAB: Warning: Unable to open display 'localhost:10.0'. KiTTY X11 proxy: Unsupported authorisation protocol Error: Can't open display: localhost:10.0 su open a new session and it does not transfer the session key, so you'll need to manually add the MIT-MAGIC-COOKIE-1 key after the su command. [email protected]@ xclock MobaXterm X11 proxy: Authorisation not recognised Error: Can't open display: localhost:10.0 Sometimes these errors show up when you switch user from the root account or any other account. The application launch dialog's Launch Details says: Xlib: connection to "localhost:10.0" refused by server Xlib: Invalid MIT-MAGIC-COOKIE-1 key Error: Can't open display: localhost:10.0 Connection to closed. When I remote login to another mac, all running 10.5.7, I can't run a remote X11 window (e.g., xeyes). I'm using SGD EE4 on Fedora 3 and cannot start any X application through TTA (not even default xclock). PuTTY X11 proxy: wrong authorisation protocol attempted Error: Can't open display: localhost:X.Y. X authentication is based on cookies, so it's necessary to set the cookie used by the user that initiated the connection. 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