gmane.linux.ubuntu.user.edubuntu

Re: install/ problems in edubuntu

dbclinton — 2012-05-25T03:25:49

I would check to make sure the video controllers on your two non-working
machines (and the client you tried to boot) are compatible with Ubuntu.
If you're running the Intel i8xx or i9xx you could have trouble.
Good luck

On Thu, 2012-05-24 at 19:38 -0700, Donald Dirks wrote:

install/ problems in edubuntu

Donald Dirks — 2012-05-25T02:38:38

I am a new user of Edubuntu 12.04.  Have installed it on three machines but
only one worked out of the box.

Problem no 1:       With the other 2 machines the *installation does not
complete *...it goes thro all the steps and then hangs on the window that
has *"Install"*
in the grey bar at the top;  in fact this is the window that says *"Who are
you?*"

This is the window that asks for your name/the user name and the password.

The only choices that gives is  BACK   and CONTINUE.    When i click on
Contiue nothing happens.

Why does this window not close?

Problem no 2:       when I close the above window, and click on Start LTSP
live  it seems to go thro the motions but again does not close the box
"Configuring LTS"

Problem no 3:  Then when I do a PXE boot connected to the server it goes
thro and ask for  a user name....etc... I just log in as guest but then it
gives me a window with 4 graphics and everything is garbled, ubreadable.
Why?

Can anyone help me please.

donWA

Re: Creating a school computer lab with edbuntu and ltsp

David Groos — 2012-05-22T17:26:56

Here's an outline of how I finally got AD working on my set up:
http://groosd.blogspot.com/2011/09/making-lucid-authenticate-via-district.htmlIt's
hard to read some of the font since I 'upgraded' to this newer style
blogspot layout.

Good luck,
David

On Tue, May 22, 2012 at 12:14 PM, Jeremy Schubert <jschubert< at >shaw.ca> wrote:

Re: Creating a school computer lab with edbuntu and ltsp

Jeremy Schubert — 2012-05-22T17:14:34

Thank you all for your advice.  

I'm thinking in terms of running this as a computer lab for the whole school, not just per classroom.  So I might have five to ten groups running though the lab all in one day.

I was thinking of 30 clients, 15 pointing to one lstp server and 15 pointing to another (to improve performance).  And I'd like to redirect the users home drives to another file server on the system to make it easier to swap out ltsp servers if necessary.  I'd also like to be able to control user profiles so that when  they're client boots up they only have the option of logging in with Gnome 3 (for example) and any changes they make to the desktops and profiles (other than saving data to their home directories which would be redirected on another file server) would be reset on logging out.  And although they wouldn't be allowed to make permanent changes, I'd like the ability to make changes on they fly.  And I'd like the ability to effect changes at a granular level, May the grade 5 class could coul

Re: Creating a school computer lab with edbuntu and ltsp

Giacomo Trovato — 2012-05-21T17:45:17

Hi All,

I have not configured locall applications since my thin clients are
very poor: Geode 500 Mhz, 256 Mb RAM without disk.
They are Alix3d3 (http://pcengines.ch/alix3d3.htm).

2012/5/21 Richard Doyle <rdoyle< at >islandnetworks.com>:

Re: Creating a school computer lab with edbuntu and ltsp

Richard Doyle — 2012-05-21T17:35:58

And video is much smoother in web browsers run as local apps.

Our classroom has a quadcore server with 4 GB RAM, 18 thin clients with
2GB apiece, running google chrome as a local app.

Re: Creating a school computer lab with edbuntu and ltsp

Quynh Vu Do — 2012-05-21T16:00:08

Hi,

2012/5/21 Giacomo Trovato <giacomo.trovato< at >gmail.com>


I had the same problem. It was solved by setting Firefox to run as
localapps on the thin client instaed of on the LTSP server :

https://wiki.ubuntu.com/LTSPLocalAppSetup

It makes a night and day difference with the same amount of RAM on the LTSP
server : no more slowdowns and freezes when not running localapps. My
config is 4 GB RAM, with a Quad-Core, running a network of 12-14 thin
clients (512 Mb RAM).

Regards

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Re: Creating a school computer lab with edbuntu and ltsp

Giacomo Trovato — 2012-05-21T14:21:54

Hi All,

I'm running Edubuntu 10.01 with 10 thin clients in a school.
I started with 3 GB on the server, but when thin clients surf the web with
Firefox (and Flash) they sometimes hanged.
If you need surfing and office applications (OpenOffice Java based) you
need a lot of RAM.
I have solved all my problems installing 8 GB ram on the server.

Giacomo (Italy)

2012/5/21 David Groos <djgroos< at >gmail.com>

Re: Creating a school computer lab with edbuntu and ltsp

David Groos — 2012-05-21T13:41:23

Building on what Mike says, I first used Edubuntu 8.04 (Hardy) with thin clients.  The clients were P3's < at >900 MHz (I believe was the speed--and 256-384 Megs RAM) and the server a Dual Core Xeon < at > 2.0 GHz, I think, and with 3 Gig RAM and RAID 5.  Things worked great until I used Flash or even worse, when I used a java-based app, "CmapTools".  These apps quickly brought the server to a standstill--not acceptable.  

The next year I upgraded from thin-clients to Local-apps, running Firefox and CmapTools as localapps and I was very satisfied with that, except I wanted to use some USB devices and there is some strangeness with what "local" means with local-apps.  I believe I had upgraded some of my clients to P4's but things were mixed, but I had upgraded all clients to 512 Megs RAM.

The next year, I moved to fat clients so as to get that local support.  I was able to upgrade all my clients to Pentium 4's, with 1 gig RAM.  Over that year I found that I didn't want less than a P4 running < at > 2.2 GHz.  This was runn

Re: Creating a school computer lab with edbuntu and ltsp

Mike Biancaniello — 2012-05-21T12:42:16

When a user logs in from a thin client, it is as if he/she is logging directly into the server.  Any user accts/home dirs that exist on the server are accessed via thin client, so it never matters which client a student uses.  You can lock down a good amount and you just do it on the server.  The experience does not change from one thin client to another.

All a thin client does is log into the server and act like a remote terminal.  All applications run on the server, hence the very low requirements for the clients.
Local apps allow spcified apps to run on the thin client, which increases the req specs for the clients, but offloads some load from the server.  If you have clients that are more powerful, you can run those as 'fat clients' where almost everything runs on the client.

As far as a processor, the bigger, the better.  
See the installation guide for server and client specs.
http://edubuntu.com/documentation/12.04/installation-guideEdubuntu 12.04 LTS Installation GuideRequirements and Prepar

Re: Creating a school computer lab with edbuntu and ltsp

Jeremy Schubert — 2012-05-21T04:16:28

Not necessarily stuck on the thin client idea  I'm not sure my next assignment will have top of the line equipment immediately available. Please explain fat clients?  Would this be a combo of XP and programs served by edbuntu?  Or edbuntu on a workstation supplemented by server ran programs?  

On 2012-05-20, at 8:49 PM, David Groos <djgroos< at >gmail.com> wrote:

Re: Creating a school computer lab with edbuntu and ltsp

David Groos — 2012-05-21T03:49:48

Hey Jeremy, you sold on thin clients or are you considering localapps and
fatclients too?
David G
On May 20, 2012 8:55 PM, "Jeremy Schubert" <jschubert< at >shaw.ca> wrote:

Re: Creating a school computer lab with edbuntu and ltsp

Jeremy Schubert — 2012-05-21T01:55:20

Thanks for the info Mike,  I will create a virtual machine edubuntu server to test this all out.  But here are a few more initial questions fro you and everyone else.  And I'd appreciate any documentation links.

1.  Specs for the server?  Assume it was hosting 30 thin clients.
2.  I assume that when a client logs in from a machine, their profile (home?) is loaded onto the server so they can move from server to server.  What is the best way of locking down settings per groups?  (For example, what programs they can access, what happens when they surf the net, how much access they have to modifying desktops and backgrounds and if thos modifications remain after logging out...)
3.  Can I run batch scripts (or equivelants) to map home folders and other folders/directories for users to access?

Thanks,
Jeremy

----- Original Message -----
From: "Mike Biancaniello" <mikebianc< at >aol.com>
To: jschubert< at >shaw.ca, edubuntu-users< at >lists.ubuntu.com
Sent: Sunday, May 20, 2012 5:55:27 PM
Subject: RE: Creating a school compute

RE: Creating a school computer lab with edbuntu and ltsp

Mike Biancaniello — 2012-05-21T00:55:27

You really don't need all of the partitions.  You can certainly create them in the install, though. 
Personally, I prefer to keep the stuff for which I need RAID to be off on its own server that just handles that and then use NFS to mount the shares (SMB if I must share to windows). 

Edubuntu can install the LTSP during the initial install.
The standard install is to have 2 NICs on the server.  One on the main ethernet (access to internet or other stuff like printers, shares, etc) and one to a private ethernet that hosts only the server and the ltsp clients.

You can install the server with only a single NIC, but remember that it will answer DHCP requests for anything on that network, so if you have another dhcp server, you would have to edit the edubuntu dhcp config to only answer for the MAC addresses of the client PCs and ignore all others.

The PXE clients don't need any operating system (mine don't even have hard drives), but you might need to edit the bios to ensure that the NIC is configured to b

Creating a school computer lab with edbuntu and ltsp

Jeremy Schubert — 2012-05-21T00:03:51

Hello there,
I'm used stetting up school computer labs in the following fashion:  
1. A group of client computers running windows xp or 7
2.  A widows 2003 server with 
- 2 NICs
- lots of ram
- a system partition 
- a hidden partition for log files 
- a data partition for users
- a partition for ISO files and programs that have to eunn from the server. 
3.  Workstations joined ro the domain forcing users ro login with domain credentials. 
4. Roaming or
mandatory profiles. 
5. Group polocies to enforce certain settings

I'd like to try the same thing with edbuntu and ltsp. So , basically, can I
1.  Instal edbuntu on a box with lots of ram and partitions (raid5?)
2. Then install LTSI
3. Then star the work stations  on PXE mode to connect to the server?

Re: Epoptes: call for translations/testing

Zied ALAYA — 2012-05-14T13:24:52

+1 to the total langages: just finished the arabic translation :)

just some problem I saw last time: when I start Epoptes after the client
login, nothing is detected.
If Epoptes is lanched before the client login: every think works well.

thx for this great application, it will be very very usuful for any teacher.

On Wed, Mar 21, 2012 at 4:38 PM, Alkis Georgopoulos <alkisg< at >gmail.com>wrote:

Re: Pessulus

Rippl, Steve — 2012-05-11T15:59:28

That's excellent news!

On Fri, May 11, 2012 at 8:25 AM, Richard Doyle <rdoyle< at >islandnetworks.com>wrote:

Pessulus

Richard Doyle — 2012-05-11T15:25:28

Pessulus, a lockdown tool, is getting some attention:
http://tranzistors.wordpress.com/2012/05/07/being-accepted-in-gsoc-and-revamp-of-pessulus/

-Richard

Thunderbird issue

Donaldson Jeffrey — 2012-05-09T18:59:07

Good Afternoon All,

I have two users that had Thunderbird open when the server crashed to 
the point I had to hard reset it. After it came back up I cleared the 
lock files in the users home directory preventing it from opening. It 
opens now, but it will not close cleanly. You can select File->Quit or 
click the "X" and Thunderbird will disappear, but if I check top, the 
process continues to run. It doesn't seem to want to release the lock 
and .parentlock files. If I manually kill the process, they go away and 
the user can then reopen. I'm using Thunderbird 11 running LTSP on 
Ubuntu 10.04. Any one have any ideas or suggestions how to fix this? It 
has become a pain to have to come in each morning and kill lingering 
processes for users to work normally. I google searched and haven't come 
up with anything that works. Any ideas are greatly appreciated. Thanks!

Jeff Donaldson
Newark Charter School

Re: Synchronize two LTSP servers' /home?

theluketaylor — 2012-05-02T13:07:00

rsync can be configured to do what you want with permissions.

I'd highly recommnd using a central authentication source like LDAP so you
don't have to make sure everyone gets created with the right UID along with
all the password hassles of different accounts on different servers.  LDAP
doesn't need a lot of bandwidth so you won't really have any issues there.

If you're like my setup edubuntu is in addition to windows labs so my
edbuntu server is joined to active directory and people just use their
existing usernames and passwords.  If you have AD it's pretty easy to do
and saves a lot of user hassle.
On Tue, May 1, 2012 at 12:01 PM, Joseph Bishay <joseph.bishay< at >gmail.com>wrote: