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    G-AVLN in front of her home

    G-AVLN in front of her home

    Mostly Unix and Linux topics. But flying might get a mention too.

    Thursday, February 02, 2006

    Allowing remote X sessions

    A couple of posts before, I have described how to use gdmsetup to enable (in conjunction with xhost + command) remote X applications on your machine.

    I've been working with our engineers (OK, here goes the mention - Dave Williams, who is fast becoming a Linux expert, and Martin Pain - who, similarly is becoming Oracle and SQL ex if not expert), to update our various course setup documents. The fix for gdmsetup needed to be scripted. A simple trick allowed me to identify the configuration line that needed to be changed:

    First save the current setting in a different file:

    # cp /etc/X11/gdm/gdm.conf /tmp/x.$$

    Then change the setting; run:

    # gdmsetup

    Select Security tab, and modify the setting for the "Always disallow TCP connections...".

    Once done, just compare the two files:

    # diff /etc/X11/gdm/gdm.conf /tmp/x.$$
    191c191
    < disallowtcp="true
    ---
    > DisallowTCP=false

    Bobs your uncle. A single line (or two):

    sed '/DisallowTCP/s/false/true/' /etc/X11/gdm/gdm.conf > /tmp/x$$
    mv /tmp/x$$ /etc/X11/gdm/gdm.conf

    placed in an appropriate script, and X applications will now be accepted.

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