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"Miranda Hawarden-Ogata" 09-28-2012 03:36 AM

centos6 - failsafe terminal on login screen
 
I have some clients that run centos6 and I need to have users be able to
access the "failsafe terminal" from the login screen. The old options (from
4/5) for choosing your session aren't present. I've googled a bit on this
but don't seem to be using a good search string as most of the hits have
nothing to do with this and the rest aren't helpful.

So, just wondering if anyone knows what I need to do to "turn on" session
choosing from the login screen, and how to include the failsafe terminal.

Thanks!
Miranda

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fred smith 09-28-2012 12:19 PM

centos6 - failsafe terminal on login screen
 
On Thu, Sep 27, 2012 at 05:36:19PM -1000, Miranda Hawarden-Ogata wrote:
> I have some clients that run centos6 and I need to have users be able to
> access the "failsafe terminal" from the login screen. The old options (from
> 4/5) for choosing your session aren't present. I've googled a bit on this
> but don't seem to be using a good search string as most of the hits have
> nothing to do with this and the rest aren't helpful.
>
> So, just wondering if anyone knows what I need to do to "turn on" session
> choosing from the login screen, and how to include the failsafe terminal.

so, if I understand correctly, you want to be able to choosoe "Gnome",
"XFCE", etc., etc. from the login screen, right?

the feature is there, but it doesn't show up until you've chosen a username
either from the list displayed, or entered one manually. so, enter a user
ID and then choose, before completing the password.

--
---- Fred Smith -- fredex@fcshome.stoneham.ma.us -----------------------------
"And he will be called Wonderful Counselor, Mighty God, Everlasting Father,
Prince of Peace. Of the increase of his government there will be no end. He
will reign on David's throne and over his kingdom, establishing and upholding
it with justice and righteousness from that time on and forever."
------------------------------- Isaiah 9:7 (niv) ------------------------------
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James Pearson 09-28-2012 04:44 PM

centos6 - failsafe terminal on login screen
 
fred smith wrote:
> On Thu, Sep 27, 2012 at 05:36:19PM -1000, Miranda Hawarden-Ogata wrote:
>
>>I have some clients that run centos6 and I need to have users be able to
>>access the "failsafe terminal" from the login screen. The old options (from
>>4/5) for choosing your session aren't present. I've googled a bit on this
>>but don't seem to be using a good search string as most of the hits have
>>nothing to do with this and the rest aren't helpful.
>>
>>So, just wondering if anyone knows what I need to do to "turn on" session
>>choosing from the login screen, and how to include the failsafe terminal.
>
>
> so, if I understand correctly, you want to be able to choosoe "Gnome",
> "XFCE", etc., etc. from the login screen, right?
>
> the feature is there, but it doesn't show up until you've chosen a username
> either from the list displayed, or entered one manually. so, enter a user
> ID and then choose, before completing the password.

If you install xorg-x11-xinit-session you get a option once you've
entered a username that will run your ~/.xsession or ~/.Xclients files
(if they exist)

You can use the file it installs
(/usr/share/xsessions/xinit-compat.desktop) as a template to create your
own 'desktop' file that will start what you like - I have a
/usr/share/xsessions/failsafe.desktop file that just starts xterm

James Pearson

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"Miranda Hawarden-Ogata" 10-04-2012 02:53 AM

centos6 - failsafe terminal on login screen
 
----- Original Message -----
From: "James Pearson" <james-p@moving-picture.com>
> fred smith wrote:
>> On Thu, Sep 27, 2012 at 05:36:19PM -1000, Miranda Hawarden-Ogata wrote:
>>
>>>I have some clients that run centos6 and I need to have users be able to
>>>access the "failsafe terminal" from the login screen. The old options
>>>(from
>>>4/5) for choosing your session aren't present. I've googled a bit on this
>>>but don't seem to be using a good search string as most of the hits have
>>>nothing to do with this and the rest aren't helpful.
>>>
>>>So, just wondering if anyone knows what I need to do to "turn on" session
>>>choosing from the login screen, and how to include the failsafe terminal.
>>
>>
>> so, if I understand correctly, you want to be able to choosoe "Gnome",
>> "XFCE", etc., etc. from the login screen, right?
>>
>> the feature is there, but it doesn't show up until you've chosen a
>> username
>> either from the list displayed, or entered one manually. so, enter a user
>> ID and then choose, before completing the password.
>
> If you install xorg-x11-xinit-session you get a option once you've
> entered a username that will run your ~/.xsession or ~/.Xclients files
> (if they exist)
>
> You can use the file it installs
> (/usr/share/xsessions/xinit-compat.desktop) as a template to create your
> own 'desktop' file that will start what you like - I have a
> /usr/share/xsessions/failsafe.desktop file that just starts xterm
>
> James Pearson

Thanks for the tips, James and Fred. I was able to get the failsafe session
offered as a login option... but I am now running into problems having the
secondary script execute within the xterm. The way the setup used to work on
centos4, a user walks up to the computer, logs in on the guest user creation
account and if they are not logging in on the main server, the account shell
logs them into the main server and then executes the guest user creation
script. On the centos6 machines, it is refusing to work that way.

If I just have "Exec=/usr/bin/xterm" in failsafe.desktop I can get the xterm
to appear with just a normal prompt, with no automatic script execution.

If I put "Exec=/usr/bin/xterm -e ssh guest@server" it pops up a second
password entry but then kicks out after the password is entered.

If I put anything else in the Exec field, I just get a regular gnome
desktop.

I'm not sure what else to try, or how to get the script to run in the xterm
automatically... there's probably something really silly that I'm missing,
but at this point I've been staring at this so long I'm just not seeing it.

Thanks!
Miranda

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James Pearson 10-04-2012 12:54 PM

centos6 - failsafe terminal on login screen
 
Miranda Hawarden-Ogata wrote:
>
> If I just have "Exec=/usr/bin/xterm" in failsafe.desktop I can get the xterm
> to appear with just a normal prompt, with no automatic script execution.
>
> If I put "Exec=/usr/bin/xterm -e ssh guest@server" it pops up a second
> password entry but then kicks out after the password is entered.
>
> If I put anything else in the Exec field, I just get a regular gnome
> desktop.
>
> I'm not sure what else to try, or how to get the script to run in the xterm
> automatically... there's probably something really silly that I'm missing,
> but at this point I've been staring at this so long I'm just not seeing it.

You could write a simple script that does all you need and just call
this script via the "Exec=..." line - this is actually what I do in my
failsafe.desktop file - although I don't know if this will help in your case

James Pearson
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Miranda Hawarden-Ogata 10-04-2012 07:11 PM

centos6 - failsafe terminal on login screen
 
On Thu, Oct 4, 2012 at 2:54 AM, James Pearson
<james-p@moving-picture.com> wrote:
> Miranda Hawarden-Ogata wrote:
>>
>> If I just have "Exec=/usr/bin/xterm" in failsafe.desktop I can get the xterm
>> to appear with just a normal prompt, with no automatic script execution.
>>
>> If I put "Exec=/usr/bin/xterm -e ssh guest@server" it pops up a second
>> password entry but then kicks out after the password is entered.
>>
>> If I put anything else in the Exec field, I just get a regular gnome
>> desktop.
>>
>> I'm not sure what else to try, or how to get the script to run in the xterm
>> automatically... there's probably something really silly that I'm missing,
>> but at this point I've been staring at this so long I'm just not seeing it.
>
> You could write a simple script that does all you need and just call
> this script via the "Exec=..." line - this is actually what I do in my
> failsafe.desktop file - although I don't know if this will help in your case
>
> James Pearson

Thanks, James, that did the trick. So now I have set up two desktops,
one a vanilla xterm and the other specifically for this purpose, runs
my script in a gnome-terminal and it appears to be working properly,
no funky pop-ups or anything. Thanks again for your help!

Thanks!
Miranda
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Nathan Duehr 10-04-2012 08:35 PM

centos6 - failsafe terminal on login screen
 
> Thanks, James, that did the trick. So now I have set up two desktops,
> one a vanilla xterm and the other specifically for this purpose, runs
> my script in a gnome-terminal and it appears to be working properly,
> no funky pop-ups or anything. Thanks again for your help!

Glad you got it working Miranda. A silly side-question...

Would a regular ol' text console have done what was needed? CTRL-ALT-F1...

Did your users need the real-estate of an X based terminal in the recovery console?

--
Nate Duehr
denverpilot@me.com

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Miranda Hawarden-Ogata 10-04-2012 08:50 PM

centos6 - failsafe terminal on login screen
 
On Thu, Oct 4, 2012 at 10:35 AM, Nathan Duehr <denverpilot@me.com> wrote:
>> Thanks, James, that did the trick. So now I have set up two desktops,
>> one a vanilla xterm and the other specifically for this purpose, runs
>> my script in a gnome-terminal and it appears to be working properly,
>> no funky pop-ups or anything. Thanks again for your help!
>
> Glad you got it working Miranda. A silly side-question...
>
> Would a regular ol' text console have done what was needed? CTRL-ALT-F1...
>
> Did your users need the real-estate of an X based terminal in the recovery console?
>
> --
> Nate Duehr
> denverpilot@me.com

Nate, to be honest I'm not 100% sure, but I think it would not... the
script needs to be functional whether the user is sshing in from a
remote location or sitting at the workstation, and it needs to be
automatic. As soon as they log in as that user, it runs the guest user
creation script and verifies that they are permitted to create an
account at this time. Also, the main server is completely blocked by
the firewall, so the user "leapfrogs" over by sshing to the one
computer with external ssh access which then ssh the user over to the
main server where they can do the account set up. Currently the same
script works whether they sit down at a console and log in as the
creation user or if they remotely login, and it needs to stay like
that, otherwise it gets too messy to maintain.

Not sure if I answered your question or not :)

Thanks!
Miranda
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Nathan Duehr 10-04-2012 11:11 PM

centos6 - failsafe terminal on login screen
 
On Oct 4, 2012, at 2:50 PM, Miranda Hawarden-Ogata <hawarden@ifa.hawaii.edu> wrote:

> Not sure if I answered your question or not :)

Yep, you did. I thought you were helping folks who were always sitting at a physical machine console.

Disregard all after "Good afternoon"! GRIN... the comment didn't apply to remote setup over the network.

Best regards,

--
Nate Duehr
denverpilot@me.com

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