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Accepted
JuanPablo
Asked: 2012-06-21 06:39:29 +0800 CST

over ssh -X : DISPLAY is not set

  • 772

I try connect over ssh with

 ssh -X user@host

but I get 

$ xterm
xterm Xt error: Can't open display: xterm:  DISPLAY is not set

$ echo $DISPLAY
# ... nothing

In my sshd_config I have

X11Forwarding yes
X11DisplayOffset 10

EDIT

In /var/log/auth.log I get 

 sshd[7396]: error: Failed to allocate internet-domain X11 display socket.
debian ssh debian-squeeze

5 Answers

  1. If ipv6 is causing an issue, add this to /etc/ssh/sshd_config and restart ssh.

    AddressFamily inet
    • 5
  2. Best Answer

    I found the problem, I dont have lo, I fix the problem added to file /etc/network/interfaces the lines

    auto lo
iface lo inet loopback
    • 4

  3. make sure that the xauth package is installed on BOTH machines

    • 0

  4. Try exporting the display value prior to logging in, like:

    export DISPLAY=localhost:0.0

    Then ssh in:

    ssh -Y user@host

    if it's not working using

    ssh -X user@host
    • 0

  5. Run xhost + and then, the ssh command.

    • 0