Lock Screen Server 12.10

[Colin Law]

On 6 February 2013 11:43, Oliver Grawert <ogra at ubuntu.com> wrote:
> Am Mittwoch, den 06.02.2013, 11:33 +0000 schrieb Colin Law:
>> On 6 February 2013 10:42, Oliver Grawert <ogra at ubuntu.com> wrote:
>> >> ...
>> >> The difference between gksu/gksudo (they're the same by default, at
>> >> least on Ubuntu) and pkexec is that pkexec's permissions are more
>> >> granular because they use polkit's rules.
>> >>
>> > sorry if the words confused anyone, gksu is not being used in any (but
>> > two that were just fixed in raring) apps in the default desktop install
>> > since a few releases already. gksu has massive probs with accessibility
>> > (grabs the whole screen and steals the focus, so screen readers as well
>> > as onscreen keyboards have issues). since all apps in the default
>> > desktop switched to use pkexec instead, gksu will be gone from the
>> > default installation with 13.04 ... if you dont want to manually install
>> > gksu all the time, better get used to the preinstalled pkexec ...
>> >
>> > the one disadvantage of pkexec is that unlike su/gksu it doesnt keep an
>> > authentication token for 10 minutes so all subsequent authentications in
>> > a script or app will pop up the password dialog again ...
>> >
>> > hope that clearifies it, indeed there is nothing wrong with using gksu,
>> > but you will have to manually install it i the future and it hasnt been
>> > actually used in the distro default setup for a while ...
>>
>> Should I be able to do this?
>>
>> $ pkexec gedit /etc/fstab
>> No protocol specified
>>
>> ** (gedit:7280): WARNING **: Could not open X display
>> Cannot open display:
>> Run '/usr/bin/gedit --help' to see a full list of available command
>> line options.
>>
> add a DISPLAY=:0 in front if you dont call it from an X terminal ....

I am trying from gnome terminal, is that not an X terminal?  But with
DISPLAY setting it still fails

$ DISPLAY=:0 pkexec gedit /etc/fstab
No protocol specified
** (gedit:8459): WARNING **: Could not open X display
Cannot open display:

Colin

>