LTSP Configurations

[bazz]

Sorry I'm not trying to spam, but Im sure if someone else tries to do what I'm doing this will save them a lot of time and headaches.

Using Ubuntu without a linux DHCP server

Install Ubuntu Feisty

Do system updates by Terminal or update icon

sudo apt-get update
sudo apt-get install upgrade
Reboot


Install the following using Terminal or the GUI Synaptic Package Manager:
Apt-get install ltsp-server thin-client-manager-gnome openssh-server
If you want local drive support such as cdrom/floppy/etc on the thinclient, Install ltspfs and add the user to the fuse group


Install LTSP thin Client

Sudo ltsp-build-client
Source for client build:
https://help.ubuntu.com/community/ThinClientHowto

To reduce network bandwidth used by X11 all traffic is tunneled through ssh, this proves remarkebly effective compared to NX compression. In order for the LTSP clients to access the server the server needs to have its IP address configured and available for SSH. Edit /etc/hosts and if you have a host line 127.0.1.1 change to the LTSP server IP address.

172.16.25.1 Demo

If you changed the hosts file you will also need to update the LTSP client with the new ssh keys, these are encryption keys used to verify the remote host of a ssh connection is who it is supposed to be, i.e. not another host with the same IP address.
$ sudo ltsp-update-sshkeys

Source:
http://developer.novell.com/wiki/ind...eKow_on_Ubuntu

Update LTSP Client Sources.list

Add sources from /etc/apt/sources.list to /opt/ltsp/i386/etc/apt/sources.list
Open a Terminal and type: sudo cp /etc/apt/sources.list /opt/ltsp/i386/etc/apt
Or sudo gedit
Edit source list on the ltsp client (/opt/ltsp/i386/etc/apt/sources.list) and add local machine sources.list (/etc/apt/sources.list) to the ltsp sources.list

Install x11vnc on ltsp client
Sudo chroot /opt/ltsp/i386
Apt-get update
Sudo apt-get upgrade
Sudo apt-get install x11vnc
exit

Edit /opt/ltsp/i386/etc/rc.local

Sudo gedit /opt/ltsp/i386/etc/rc.local
Add the following line before the exit 0 statement in this file and save it:
x11vnc -display :6 -forever -loop &

Ensure rc.local gets executed:
Sudo chroot
cd /etc/rc2.d
mv K99rc.local S99rc.local
exit

Source:
https://wiki.edubuntu.org/InstallX11VncOnLtspClients

Set up SSH for remote Admin
(This allows you to remote reboot your Thin Client)

As the current user logon using Sudo do the following
# SSH needs /dev/random and proc interface, so mount them
mount --bind /dev /opt/ltsp/i386/dev
mount -t proc none /opt/ltsp/i386/proc
# Make sure that resolv will work iin chroot
cp /etc/resolv.conf /opt/ltsp/i386/etc/

Now chroot the /opt/ltsp/i386
chroot /opt/ltsp/i386
# Install ssh server
apt-get install ssh
# Enable root user by setting a password
passwd root
It's also possible to install your public key in $CHROOT/root/.ssh/authorized_keys to connect to the terminal without using the root password.

Source:
https://help.ubuntu.com/community/Ho...velEnvironment

Give Root Logon Access

Sudo chroot /opt/ltsp/i386
Passwd

Run tftpd as a Daemon

sudo gedit /etc/default/tftpd-hpa
change the line that says
RUN_DAEMON=”no” to
RUN_DAEMON=”yes”

Once the LTSP server is online on the correct network do the following in a Terminal.
Sudo ltsp-update-sshkeys

Configure Client to get Hostname from the DHCP server

Edit /opt/ltsp/i386/etc/hostname
Delete the entry so nothing is written
Save

Configure LTSP Clients optional at this point

The configuration file /opt/ltsp/i386/etc/lts.conf can contain a list of X11 and LTSP configuration options that can be specified for individual or groups of machines. It can include X11 servers, mice, keyboards, attached devices, etc. A detailed list of the valid options can be found in /opt/ltsp/i386/usr/share/doc/ltsp-client/examples/lts-parameters.txt.gz including an example lts.conf.


[Default]
# LTSP server IP address
#SERVER = server
SERVER = 10.30.2.20


## Network syslog
#SYSLOG_HOST = server


## X11 driver, e.g. auto, vesa, i810
#XSERVER = auto
#X_COLOR_DEPTH = ""
X_COLOR_DEPTH = 16
#X_VIDEO_RAM = ""
#XF86CONFIG_FILE = ""


## Keyboard configuration
#XKBLAYOUT = us
#XKMODEL = pc105
#XKBRULES = xorg
#XKBOPTIONS = lv3:ralt_switch
#XKBVARIANT = ""
#CONSOLE_KEYMAP = ""


## Mouse configuration
#X_MOUSE_DEVICE = /dev/input/mice
#X_MOUSE_PROTOCOL = auto
#X_MOUSE_EMULATE3BTN = True


## X11 font server
#USE_XFS = False
#XFS_SERVER = server


## SSH compression between LTSP client and server
#NETWORK_COMPRESSION = False


## Network swap device for clients < 48 MB system memory
#NBD_SWAP = ""
#SWAP_SERVER = server
#NBD_PORT = 9572


#USE_LOCAL_SWAP = False


## Local media device support
#LOCALDEV = False


## Local printers
#PRINTER_0_DEVICE = ""


## Sound configuration
#SOUND = False
#SOUND_DAEMON = esd


## Terminal sessions
#SCREEN_07 = ldm


## Linux modules
#MODULE_01 = ""


## Custom startup scripts
#RCFILE_01 = ""
#LDM_REMOTECMD = ""
The configuration file can use "True" or "False", try not to be confused as regular LTSP 4.2 prefers "Y" and "N".

Windows 2003 DHCP set up

This page describes the steps needed to setup a windows DHCP server in order to run the LTSP Ubuntu
The Ubuntu default install of LTSP assumes that you are going to use the built in DHCP server to assign ip addresses to your clients. In many establishments this is not the desired method for implementation as there is most likely an existing DHCP server. The following steps detail how to make specific machines boot from the LTSP server, but utilise a windows DHCP server for the ip assignment.


This guide assumes you already have a running windows DHCP server and that you are specifying certain machines to boot from the LTSP server, ie. the majority of your machines are still running as they normally would.

You will need to obtain the MAC address of each machine that requires to be bootable on the LTSP server. This can be achieved by asking the specified machine to try to boot from LAN. A DHCP message will appear, similar to the following
CLIENT MAC ADDR: 00 0C 29 76 88 21 GUID: 234D234D-B4CC-6CEF-0EBD554566345

Login to your windows server and load the DHCP configuration screen
Create a DHCP reservation for the MAC address you obtained

Add the configuration options below to enable the machine to boot from the LTSP server
017 Root Path: /opt/ltsp/i386
066 Boot Server Host Name: <ip address>
067 Bootfile Name: ltsp/i386/pxelinux.0
012 HostName: enter the workstation name.
Note: If your thin client is not working, replace the NIC with a different model. Even if the thin client worked on a pure LTSP with integrated DHCP, it does not mean it will work with the Windows 2003 DHCP forwarding the pxe boot.

Source:
https://help.ubuntu.com/community/Ub...TSPWindowsDHCP

VMWare Desktop 6 Thin Client

Install Guest OS as the VM user
Create a directory in the / called Vmware
Ensure the correct permissions are set for the folder and files once the VM is completed
Go to System -> Administration->Users and Groups
Click Manage Groups
Add vmusers
Add the user for the vmware machines to the vmusers group

Do what ever you need, the above is/was the setup I was going to implement. You may be beter off just doing everything in default.

Add .xsession to the users home directory with a path to the virtual machine.
A little explanation on this...
What this does is, when the user logs on it will automatically start a vmware session. I found that Vmware workstation 6 works best so far. You can set it up so the thin-client boots with window or what ever os full screen. You can also make it look transparent to the end usre so it looks like the thin-client is using a plain old windows machine. Auto logo on and so on. The other cool thing is you can use the screen-viewer to see what the end user is doing, (there is a small bug with the Viewer. If the desktop of the thin client does not show up, just do a vncviewer IPaddress:0 to it, once its up close it, that try the viewer and you should see the thin-client desktop in the viewer.) or you could just vncviewer to the machine and control it.
You can also do all this with Win4lin server, but its a bit slower and uses a bit more processing power. I want to try to get virtualbox and Xen working the same way but dont have the time. I found some info on doing it with Xen here https://lists.ubuntu.com/archives/ed...er/002429.html
if anyone wants to check it out and give it ago.
Well if anyone has any info or success with doing this with Xen, or virtual box...Please post!


Example:
/home/test/.xsession


#! /bin/bash
vmware -X -q /VMware\ Machine/Windows\ 2000\ Professional/Windows\ 2000\ Professional.vmx


}


run_parts () {
# until run-parts --noexec is implemented
if [ -z "$1" ]; then
internal_errormsg "run_parts() called without an argument."
fi
if [ ! -d "$1" ]; then
internal_errormsg "run_parts() called, but \"$1\" does not exist or is" \
"not a directory."
fi
for F in $(ls $1); do
if expr "$F" : '[[:alnum:]_-]\+$' > /dev/null 2>&1; then
if [ -f "$1/$F" ]; then
echo "$1/$F"
fi
fi
done
}

Follow the Win4lin instructions.

Initial configuration may consist of simple changes such as ensuring that the Administrator user in Windows logs in automatically without having to prompt the user. Since the system image will be provisioned to other users in a "copy-on-write" fashion, it is not a security risk that the default user in Windows be Administrator. Once the initial configuration is complete, the system administrator shuts down the session using the Shut Down function of the Start menu. Next, the administrator makes a backup copy of the guest image, to preserve the pristine installation in case something becomes corrupt during future configuration steps:


cd ~/winpro
cp GUEST.IMG GUEST.IMG.bak


Next, the system administrator designates the winpro configuration of the master user as a master profile:


/opt/win4linpro/bin/export-profile


Notice that there are no special arguments to export-profile since the default winpro configuration is being used.
In order to complete the export, the session is started (and promptly shut down) one more time:


winpro


Now is a good time to import the profile for the two users we want to provision. This does not need graphical capabilities, so we can switch users using the su command and not worry about the DISPLAY variable. Each user's password is of course typed in at the su prompt:


User created on the server
su - testuser
/opt/win4linpro/bin/import-profile /home/master/winpro
exit

At this point the basic export/import of the master profile and provisioning to the users is complete. Any changes in the master profile will now automatically propagate to the users who import from it testuser. Also, further configuration may be done graphically and remotely from a computer running the Win4Lin WTS/VDS client. There is no need to use shell commands anymore, except of course to make a final backup of the master profile's GUEST.IMG file once the application configuration is done.


Copy the /opt/win4linpro/bin/mergepro.xsession to /home/testuser
Rename the mergepro.xsession to .xsession.
Start your LTSP thin client logon, and you should have a full screen win4lin session.

All this can also be done with VMware Player

This is criptic I know. If someone wants to clean it up and post it some where that be cool. Most of the info is floating around in different places on the net, some I just figgured out. Hope this helps someone out there. I posted most of the sources. As for the Win2003....There is info all over the place, little bits and pieces all over, I just put the pieces together.

Feed back would be good.

Let me know what you think.

[DrHu]

LTSP & Education Fossdem
www.fossed.net
http://fossed.blogspot.com/
www.ltsp.org
www.softwarefreedomday.org

[bazz]

I just did an update to this. A bit cleaner, and a different config. Cool stuff!!!

[bazz]

I'm also trying to do this with virtualbox, but its not working out for me. Anyone have any experience with VirtualBox???

[Beardie Man]

Originally Posted by bazz

I'm also trying to do this with virtualbox, but its not working out for me. Anyone have any experience with VirtualBox???

I use virtual box PM me if you have any questions.

[bazz]

Just wondering.....does anyone have any interest in this??? I am actualy using this for an automation system!! I have a lot more configs in place, and very cool stuff, but just wondering if anyone else in here has a use for this.
It be a cool project to try to build and automation distro for this. However that is not something I could do on my own!
If there is interest and anyone wants to know how I am using this, let me know. Its a nice setup for a lab environment. I'm also thinking I should be saving about 70% in cost, between hardware, parts, and energy. At this point I am in geek heaven!

Oh BTW I fix a goof in the config setup.
where it use to say
067 Bootfile Name: ltsp/pxelinux.0
It now says
067 Bootfile Name: ltsp/i386/pxelinux.0
The thin client could not find the image the other way

[bazz]

Is there any possiblity of maybe getting an LTSP forum in here? Who could I ask?

[DrHu]

Originally Posted by bazz

Is there any possiblity of maybe getting an LTSP forum in here? Who could I ask?

Dr.Jones or JDoyle comes to mind

I wouldn't mind seeing forum on installation scenarios, of which LTSP is a subset.

For example..
I am thinking of using a 1TB hard drive, and trying to decide how to partition it for Freespire + other Linux distributions
--should I

• Should I use LVM for partition management
• Set a small root partition for Freespire (20GB)
• Set a separate /home partition
• Set a separate /apps partition
• Set a separate /share partition

Now what about links to the various partitions
Can I install software into /apps, with my personal settings into /home and any shareable data into /share
--what do I have to consider for this to work seamlessly.

So, I think it might prove more theoretical than practical
--that old problem of your scenario does not exactly match mine, so I can't really use it

Still it may be a good idea if LTSP is oriented to practical LTSP solutions, but it may be that LTSP is already servicing these issues via their own sites and forums ?

Waiting to exhale, waiting to see what happens next!

[bazz]

Originally Posted by DrHu

Dr.Jones or JDoyle comes to mind

I wouldn't mind seeing forum on installation scenarios, of which LTSP is a subset.

For example..
I am thinking of using a 1TB hard drive, and trying to decide how to partition it for Freespire + other Linux distributions
--should I

• Should I use LVM for partition management
• Set a small root partition for Freespire (20GB)
• Set a separate /home partition
• Set a separate /apps partition
• Set a separate /share partition

Now what about links to the various partitions
Can I install software into /apps, with my personal settings into /home and any shareable data into /share
--what do I have to consider for this to work seamlessly.

So, I think it might prove more theoretical than practical
--that old problem of your scenario does not exactly match mine, so I can't really use it

Still it may be a good idea if LTSP is oriented to practical LTSP solutions, but it may be that LTSP is already servicing these issues via their own sites and forums ?

Waiting to exhale, waiting to see what happens next!

A bunch of us over in the Ubuntu forums have looked. There is not much out therre for the LTSP, or edubuntu setups. There is an Irc and a mailing list, but that is about it. The ubuntu wiki is very out dated, so we are trying to pull something together.
So some us are lookong for someone who may want to help us try to centrlize info.

[DrHu]

Originally Posted by bazz

A bunch of us over in the Ubuntu forums have looked. There is not much out therre for the LTSP, or edubuntu setups. There is an Irc and a mailing list, but that is about it. The ubuntu wiki is very out dated, so we are trying to pull something together.

And yes, I do see that there are no specific offers from the developers (the people) for helping with the project ..

I do see this wiki page..
http://wiki.ltsp.org/twiki/bin/view/Ltsp/WebHome
--and I see this video, but I didn't listen to it
http://www.ubuntuvideo.com/edubuntu_ltsp_project
this is where I think simplifying a scenario would work..

The video Edubuntu spends time showing how a computer works, by fiddling with disks and having an open case.
--what is likely to be more successful is either a slide show (like a quick guide ) that manufacturers of an OS or a device, sometimes include in their packaging. Or if one did use a video format, skip the hardware setups, and get right into connecting via the LTSP software and showing some of its operations, and refer to hardware setups as being a separate issue, and dependent on your specific equipment.
--or perhaps there is a recommendation list for hardware that has worked or thin client products like
http://www.neoware.com/products/os/t...t_linux_os.php
{which might be of base for an LTSP configuration, I don't know ?)

so we are trying to pull something together.

I would suggest this method..

• introduction
  --the areas where ltsp may be used and why
• A scenario of typical setups, based on the areas above
  --I would keep the scenarios very limited in detail and simply provide a details page (cross referenced to the simplified scenario page)
• For more information:
  contacts: blog, perhaps wordpress, drupal, joomla), whatever was your pleasure..

Some people can't or don't have the time to read..
--maybe LTSP already partially does this, but in the vernacular of the inevitable Duh! crowd, it is too thick on the ground with text, and where are the powerpoint slides..

Kiss..a philosophy and a method
So make it (the scenarios) a slide show, a flash presentation or a video
--but of course, being in Linux you don't have to use powerpoint for the presentation.

I am not using LTSP, but if I were, this is the approach I think I would be using..

[bazz]

Originally Posted by DrHu

And yes, I do see that there are no specific offers from the developers (the people) for helping with the project ..

I do see this wiki page..
http://wiki.ltsp.org/twiki/bin/view/Ltsp/WebHome
--and I see this video, but I didn't listen to it
http://www.ubuntuvideo.com/edubuntu_ltsp_project
this is where I think simplifying a scenario would work..

The video Edubuntu spends time showing how a computer works, by fiddling with disks and having an open case.
--what is likely to be more successful is either a slide show (like a quick guide ) that manufacturers of an OS or a device, sometimes include in their packaging. Or if one did use a video format, skip the hardware setups, and get right into connecting via the LTSP software and showing some of its operations, and refer to hardware setups as being a separate issue, and dependent on your specific equipment.
--or perhaps there is a recommendation list for hardware that has worked or thin client products like
http://www.neoware.com/products/os/t...t_linux_os.php
{which might be of base for an LTSP configuration, I don't know ?)
I would suggest this method..

• introduction
  --the areas where ltsp may be used and why
• A scenario of typical setups, based on the areas above
  --I would keep the scenarios very limited in detail and simply provide a details page (cross referenced to the simplified scenario page)
• For more information:
  contacts: blog, perhaps wordpress, drupal, joomla), whatever was your pleasure..

Some people can't or don't have the time to read..
--maybe LTSP already partially does this, but in the vernacular of the inevitable Duh! crowd, it is too thick on the ground with text, and where are the powerpoint slides..

Kiss..a philosophy and a method
So make it (the scenarios) a slide show, a flash presentation or a video
--but of course, being in Linux you don't have to use powerpoint for the presentation.

I am not using LTSP, but if I were, this is the approach I think I would be using..

I agree with you for the most part..However I for one do not have time to do all the above. I think the best I could do for setups is screen shots, but then I would not know where or how to post those. The screen shots would be the same exact thing as the text instructions so Im not sure how that would help.
For the scenario thing....I think that be easy!
I think for a start this give a good explination.
https://help.ubuntu.com/community/Ed...%28scenario%29
Well if something does end up happining I would hope you would jump on the team. You sound like you could be a big help with direction!

[russell_nash]

Hi,
I have followed this guide, and things are working fine except for probelms with Install x11vnc on ltsp client, or trying to apt-get any extra packages, e.g. I would like to install Tor on my client. I get the following output:

root@mark-desktop:/# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
libcairo2 libcomerr2 libcupsys2 libflac8 libpango1.0-0 libpango1.0-common
libpng12-0 libpulse0 libss2 libssl0.9.8 libuuid1 libxfont1
linux-image-2.6.22-14-386 openssh-client pulseaudio pulseaudio-esound-compat
tzdata xserver-xorg-core xserver-xorg-video-intel
19 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
6 not fully installed or removed.
Need to get 0B/28.7MB of archives.
After unpacking 229kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Preconfiguring packages ...
Can not write log, openpty() failed (/dev/pts not mounted?)
(Reading database ... 16356 files and directories currently installed.)
Preparing to replace linux-image-2.6.22-14-386 2.6.22-14.46 (using .../linux-image-2.6.22-14-386_2.6.22-14.52_i386.deb) ...
Done.
Unpacking replacement linux-image-2.6.22-14-386 ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-2.6.22-14-386.postrm line 320.
dpkg: warning - old post-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/tmp.ci/postrm line 320.
dpkg: error processing /var/cache/apt/archives/linux-image-2.6.22-14-386_2.6.22-14.52_i386.deb (--unpack):
subprocess new post-removal script returned error exit status 1
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/tmp.ci/postrm line 320.
dpkg: error while cleaning up:
subprocess post-removal script returned error exit status 1
Errors were encountered while processing:
/var/cache/apt/archives/linux-image-2.6.22-14-386_2.6.22-14.52_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@mark-desktop:/# sudo apt-get install x11vnc
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
libavahi-client3 libavahi-common-data libavahi-common3 libvncserver0
Suggested packages:
libvncserver0-dbg
The following NEW packages will be installed:
libavahi-client3 libavahi-common-data libavahi-common3 libvncserver0 x11vnc
0 upgraded, 5 newly installed, 0 to remove and 19 not upgraded.
6 not fully installed or removed.
Need to get 0B/19.6MB of archives.
After unpacking 2355kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Can not write log, openpty() failed (/dev/pts not mounted?)
(Reading database ... 16356 files and directories currently installed.)
Preparing to replace linux-image-2.6.22-14-386 2.6.22-14.46 (using .../linux-image-2.6.22-14-386_2.6.22-14.46_i386.deb) ...
Done.
Unpacking replacement linux-image-2.6.22-14-386 ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-2.6.22-14-386.postrm line 320.
dpkg: warning - old post-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/tmp.ci/postrm line 320.
dpkg: error processing /var/cache/apt/archives/linux-image-2.6.22-14-386_2.6.22-14.46_i386.deb (--unpack):
subprocess new post-removal script returned error exit status 1
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/tmp.ci/postrm line 320.
dpkg: error while cleaning up:
subprocess post-removal script returned error exit status 1
Errors were encountered while processing:
/var/cache/apt/archives/linux-image-2.6.22-14-386_2.6.22-14.46_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Any ideas why i am getting this? I tried using this command before doing the process as it describes in the edubuntu manual.

mount -t proc proc /proc

the same thing happens no matter. I would appreciate any help, guidance certainly is "thin" on the ground for thin clients. :-)

Thanks.

[bazz]

Originally Posted by russell_nash

Hi,
I have followed this guide, and things are working fine except for probelms with Install x11vnc on ltsp client, or trying to apt-get any extra packages, e.g. I would like to install Tor on my client. I get the following output:

root@mark-desktop:/# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
libcairo2 libcomerr2 libcupsys2 libflac8 libpango1.0-0 libpango1.0-common
libpng12-0 libpulse0 libss2 libssl0.9.8 libuuid1 libxfont1
linux-image-2.6.22-14-386 openssh-client pulseaudio pulseaudio-esound-compat
tzdata xserver-xorg-core xserver-xorg-video-intel
19 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
6 not fully installed or removed.
Need to get 0B/28.7MB of archives.
After unpacking 229kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Preconfiguring packages ...
Can not write log, openpty() failed (/dev/pts not mounted?)
(Reading database ... 16356 files and directories currently installed.)
Preparing to replace linux-image-2.6.22-14-386 2.6.22-14.46 (using .../linux-image-2.6.22-14-386_2.6.22-14.52_i386.deb) ...
Done.
Unpacking replacement linux-image-2.6.22-14-386 ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-2.6.22-14-386.postrm line 320.
dpkg: warning - old post-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/tmp.ci/postrm line 320.
dpkg: error processing /var/cache/apt/archives/linux-image-2.6.22-14-386_2.6.22-14.52_i386.deb (--unpack):
subprocess new post-removal script returned error exit status 1
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/tmp.ci/postrm line 320.
dpkg: error while cleaning up:
subprocess post-removal script returned error exit status 1
Errors were encountered while processing:
/var/cache/apt/archives/linux-image-2.6.22-14-386_2.6.22-14.52_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@mark-desktop:/# sudo apt-get install x11vnc
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
libavahi-client3 libavahi-common-data libavahi-common3 libvncserver0
Suggested packages:
libvncserver0-dbg
The following NEW packages will be installed:
libavahi-client3 libavahi-common-data libavahi-common3 libvncserver0 x11vnc
0 upgraded, 5 newly installed, 0 to remove and 19 not upgraded.
6 not fully installed or removed.
Need to get 0B/19.6MB of archives.
After unpacking 2355kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Can not write log, openpty() failed (/dev/pts not mounted?)
(Reading database ... 16356 files and directories currently installed.)
Preparing to replace linux-image-2.6.22-14-386 2.6.22-14.46 (using .../linux-image-2.6.22-14-386_2.6.22-14.46_i386.deb) ...
Done.
Unpacking replacement linux-image-2.6.22-14-386 ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-2.6.22-14-386.postrm line 320.
dpkg: warning - old post-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/tmp.ci/postrm line 320.
dpkg: error processing /var/cache/apt/archives/linux-image-2.6.22-14-386_2.6.22-14.46_i386.deb (--unpack):
subprocess new post-removal script returned error exit status 1
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/ltsp-update-kernels
Cannot open ``/boot/nbi.img-2.6.22-14-386'':File exists
run-parts: /etc/kernel/postrm.d/ltsp-update-kernels exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/tmp.ci/postrm line 320.
dpkg: error while cleaning up:
subprocess post-removal script returned error exit status 1
Errors were encountered while processing:
/var/cache/apt/archives/linux-image-2.6.22-14-386_2.6.22-14.46_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Any ideas why i am getting this? I tried using this command before doing the process as it describes in the edubuntu manual.

mount -t proc proc /proc

the same thing happens no matter. I would appreciate any help, guidance certainly is "thin" on the ground for thin clients. :-)

Thanks.

For some reason this is now happing with gusty...not sure about feisty. It seems to be fixed in Hardy....Hardy is making things a lot easier. In hardy you no longer need to do
mount --bind /dev /opt/ltsp/i386/dev
mount -t proc none /opt/ltsp/i386/proc
manualy.

I think to install the vnc package you want you need todo both mounts.

As of the moment..I would sugest just doing apt-get update, and install what you need to...seems the upgrade is broke now.

If your using gusty I would also sugest doing a sudo ltsp-update-image after the packages have been installed.
Once you have x11vnc on the client try to run it manualy vncviewer xxx.xxx.x.xxx:0
If it opens you should be good to go.

Oh and dont forget to do this part.
Edit /opt/ltsp/i386/etc/rc.local
Sudo gedit /opt/ltsp/i386/etc/rc.local
Add the following line before the exit 0 statement in this file and save it:
x11vnc -display :6 -forever -loop -shared & <---the shared is new...not sure what it does.but I have tested it on gusty.
Gusty needs this as well.


Let me know how you make out.
BTW you may need to rebuild your thinclient. Start clean may be the best way to do it. Just delete the i386 folder /opt/ltsp/i386.
once gone do the sudo ltsp-build-client, copy the source list,
Then do sudo
mount --bind /dev /opt/ltsp/i386/dev
mount -t proc none /opt/ltsp/i386/proc
then chroot /opt/ltsp/i386
do apt-get update
apt-get install x11vnc tor

[russell_nash]

Thanks a lot for responding. I am using gutsy, sorry I didn't mention it. Your advice sorted out the problem of the package not installing, it all went correctly with no error messages, but first I had to rebuild the client as you suspected.

Originally when I tried, vncviewer 192.168.0.250:0 came up with

"unable to connect to host: Connection refused (111)"

However, the next day when I turned on my computer, the vncviewer 192.168.0.250:0 command worked perfectly. I have no idea why it changed, but the main thing is that it works now.

The only thing I have tried to use on my thin client that doesn't work correctly is Skype, which plays all its sound at the server, but this appears unavoidable for the foreseeable future:

https://developer.skype.com/jira/browse/SCL-271

Thankyou for your time, Bazz.

Although Skype doesn't like it, Wengophone seems very happy to work from a thin client.

[bazz]

Originally Posted by russell_nash

Thanks a lot for responding. I am using gutsy, sorry I didn't mention it. Your advice sorted out the problem of the package not installing, it all went correctly with no error messages, but first I had to rebuild the client as you suspected.

Originally when I tried, vncviewer 192.168.0.250:0 came up with

"unable to connect to host: Connection refused (111)"

However, the next day when I turned on my computer, the vncviewer 192.168.0.250:0 command worked perfectly. I have no idea why it changed, but the main thing is that it works now.

The only thing I have tried to use on my thin client that doesn't work correctly is Skype, which plays all its sound at the server, but this appears unavoidable for the foreseeable future:

https://developer.skype.com/jira/browse/SCL-271

Thankyou for your time, Bazz.

Although Skype doesn't like it, Wengophone seems very happy to work from a thin client.

Yes I should have told you to reboot. That normaly does the trick!
The reason for it working is when you do this

Edit /opt/ltsp/i386/etc/rc.local
Sudo gedit /opt/ltsp/i386/etc/rc.local
Add the following line before the exit 0 statement in this file and save it:
x11vnc -display :6 -forever -loop -shared &

Sudo chroot
cd /etc/rc2.d
mv K99rc.local S99rc.local
exit

it is making vnc start at boot.

Oh one last note. Anytime you make a change to the client, no matter how small it is you should always do a ltsp-update-image
For exampe I set a password in my client, and I could not logon at all. It was only when I remembered I never updated the image, that I got it to work. All I had to do was sudo ltsp-update-image and I could then logon.