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I have installed filezilla on ubuntu, which I need to run from the command line. But when I try to run it showing eg. help or version I get:

~$ filezilla -h
Error: Unable to initialize gtk, is DISPLAY set properly?
~$ filezilla -v
Error: Unable to initialize gtk, is DISPLAY set properly?

As I understand a commandline interface should exists for linux:

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What does "echo $DISPLAY" say? Are you trying to run Filezilla via SSH? – Ernestas Jan 2 '13 at 11:20
On my debian sid work box (yes, I know) I get this; $ filezilla -v FileZilla 3.5.3, compiled on 2012-06-29 No output actually attaches to the X-server, though I have one running. What happens here if you artificially set DISPLAY=:1 or something similar and try it again? – Xyon Jan 2 '13 at 11:20
echo $DISPLAY gives nothing, but why do I need to set the display when running from commandline/headless/without gui? "set DISPLAY=:1" does not help - it still gives empty output when doing echo $DISPLAY – u123 Jan 2 '13 at 12:03
Try it like: DISPLAY=:1 filezilla -v – Xyon Jan 2 '13 at 12:30
Still gives: Error: Unable to initialize gtk, is DISPLAY set properly? I have tried to do "export DISPLAY=:1" but I still get the above error - but now it actually has a value when I echo it. – u123 Jan 2 '13 at 12:33

You need to enable server access control program for X by invoking xhost + in your normal user terminal. It will grant any user to connect to X-server. Once you are done, just make sure to restrict it by xhost - since its enable by default for security reasons.

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Maybe I am missing the big picture here but is a X-server not only required for running gui apps? I just need to run the command line version of filezilla. I have tried "xhost +" which gives: "~$ xhost + xhost: unable to open display ":1" – u123 Jan 3 '13 at 8:13
xhost + : Turns off access control (all remote/local hosts will have access to X server) When every I run into issues like ` Gtk-WARNING **: cannot open display: :0.0` I turn the access control off, and it works. – WeloSefer Jan 3 '13 at 8:51
and make sure you have gtk installed on your machine – WeloSefer Jan 3 '13 at 8:57

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