over ssh -X : DISPLAY is not set

Question

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.

Is an X server running on your source? Before you ssh anywhere else, `echo $DISPLAY` — Sirch, Jun 20 '12 at 16:42

score 5 · Answer 1 · answered Jun 20 '12 at 16:26

5

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

AddressFamily inet

answered Jun 20 '12 at 16:26

Sirch

I try add `AddressFamily inet` and restart `sshd` but get the same, and try `ssh -4` to force ipv4, but nothing – JuanPablo Jun 20 '12 at 16:30
This worked for me. – sirhc Apr 28 '15 at 22:18

score 4 · Accepted Answer · answered Jun 20 '12 at 19:10

4

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

answered Jun 20 '12 at 19:10

JuanPablo

After all the suggestions of "AddressFamily inet" or "install xauth" etc, this was the actual fix for me. Thanks – Coops Jan 14 '16 at 05:34

score 0 · Answer 3 · answered Jun 20 '12 at 14:43

0

make sure that the xauth package is installed on BOTH machines

answered Jun 20 '12 at 14:43

stew

score 0 · Answer 4 · answered Jun 20 '12 at 18:45

0

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

answered Jun 20 '12 at 18:45

Logic Wreck

score 0 · Answer 5 · answered Jun 20 '12 at 18:48

0

Run xhost + and then, the ssh command.

answered Jun 20 '12 at 18:48

sntg