The above command will take some time as it will download all packages for this stripped-down Ubuntu-based “thin client” operating system and install them under: /opt/ltsp/i386/. It will then compress this into /opt/ltsp/images/i386.img, this is the the actual image that will be served to the client via. How to install LTSP (Linux Terminal Server Project) on Ubuntu Server Overview. I've had a lot of people ask me how I achieved my thin client setup so I thought it's about time I added a guide or two! This particular guide will show you how to create thin Ubuntu Clients. Later guides will show you how to run MS Windows thin clients.

Managing Your LTSP Server Updating the ServerShortly after installation, you may notice a balloon message appear in the top right-hand corner of the screen informing youthat updates are available for your system. It is advisable that you install updates because they help keep your system secureand bug free.

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To install these updates, simply click on the balloon or launch the update manager by going to the System Administration Update Manager link in the main menu.You will be prompted for your password and then presented with a list of updates available for your system. If there are anyupdates that you do not want to install, simply untick them from the list at the top of the window. When you are satisfied,click on the Install Updates button. Downloading all the required packages from the Internet will take a while to complete,especially if this is the first time you have run the update manager since installation.Installing ApplicationsBy default, the operating system is configured to talk to all of the software repositories. These are explained in greaterdetail in Chapter 5. There are many more packages available in the universe and multiverse repositories; however, some may have different licensing.By using the Software Sources package, you can modify this list of repositories.

Simply select System Administration SoftwareSources from the menu, and you will be presented with the Software Sources screen.Whether you are running a thin client system or you installed Ubuntu or Edubuntu in a non-LTSP mode, you will at some pointneed to install extra applications onto the system. This is simple in either Ubuntu or Edubuntu and is achieved by selectingApplications Add/Remove from the main menu at the top left of the screen. Enter your password when prompted, and you willsee the Add/Remove Applications window appear.In addition to being the central point for installing all extra software for your system, the Add/Remove Applications programhas a special section just for education. Clicking on this will filter the available set of applications to show those thathave a high relevance to educational establishments.

At the time of writing there were over eighty applications availablein this section, and the list keeps growing, as shown in. In the application list you will see some checkboxes next to the application names. If you want to install a particular application,simply tick the checkbox next to its name.

You can select multiple applications before clicking the Apply button.Once you have chosen your applications and clicked the Apply button, you will be guided through the rest of the procedureand asked to confirm your selections prior to installation. Edubuntu will now collect the packages from the Internet or theEdubuntu CDs and begin installing them on your machine.If you have chosen a few packages, the installation step may take a while.

Installing software in this way is easy becauseAdd/Remove Applications will handle all the required dependencies and install those, too.Once the install has completed, the new applications should now be available on your Edubuntu machine. If you are runninga thin client system, this now means that all the clients have the software available to them and can use it right away.Removing ApplicationsJust as it was easy to install applications in Edubuntu, the same applies for removing them.

The process is just the exactreverse of the install procedure. Load up the Add/Remove Applications utility and simply untick the applications that youno longer want to be installed.Clicking on the Apply button will prompt you to confirm your decision before removing the packages you selected.

The packagewill now no longer be available on the Edubuntu server or on any thin client machine that boots from the network.Changing Your IP AddressAt some point it may become necessary to change the IP address of the server. Changing the IP address of a normal machinewould not usually have much consequence on the client machine. However, in an LTSP environment, changing the IP address willresult in clients being unable to log in.

This is because when the LTSP root is built, it is populated with SSH authorizationkeys, which allow authentication between the client and the server without a password.The procedure for solving this issue is fairly simple. First, you must load a terminal window, using the Applications Accessories Terminal link in the main menu. Once this has loaded, you need to run the LTSP SSH key update script by typing the followingcommand into the terminal and pressing Enter. You will be prompted for your password.sudo ltsp-update-sshkeys. TIPIt is possible here to update the SSH keys by simply restarting the network interface, using a command similar to the followingone.

You will need to replace with the interface identifier, usually something like eth0 or eth1.sudo ifdown && sudo ifup Once completed, your SSH keys will be updated, and after the clients reboot, they should be able to log in again. Local Devices over LTSPSince Ubuntu Edgy 6.10, Edubuntu has included the update to LTSP to allow what are called local devices. Plugging a USB storagedevice into a thin client machine, for example, will trigger the local devices mechanism, and the device will be correctlymounted and shown on the desktop of the client machine.When using USB sticks with Ubuntu, you would normally have to unmount the device before removing it physically. This is sothat Ubuntu has time to write all the data it needs to the USB stick and can safely unmount it.

In the LTSP environment, usinga USB stick is a little different. There is no unmount option because the data is written to the USB stick on a very regularbasis.

Hence you do not need to unmount it and can just remove it once the computer has finished writing information to it.Local device support is set up by default in Edubuntu; however, to use it you must add to the fuse group the users who requireaccess to such support. You can do this from the user manager. Start by going to System Administration Users and Groupsoption. From here, select the user to whom you wish to give local device access and click on the User Properties button. Clickon the User Privileges tab, and from here tick the checkbox for allowing use of fuse filesystems, as shown in.

Sound over LTSPSince Ubuntu Dapper 6.06, Edubuntu has the ability to play sound through the speakers of the client machine. For versionsof Edubuntu prior to 6.10 and LTSP setups installed on top of Ubuntu, you must add an entry to the /opt/ltsp/i386/etc/lts.conf file to enable soundfor client machines.The easiest way to edit this file is to hold down Alt-F2, which will bring up the run command dialog box.

Type in the followingcommand:gksudo 'gedit /opt/ltsp/i386/etc/lts.conf'Clicking OK will bring up an editing window. Make sure to have at least a default section in the lts.conf file where you will add the following line:SOUND=True. NOTEDapper 6.06 LTS is very particular about the SOUND=True statement.

You must type it exactly as shown, taking extreme care with capital letters and so on.For all versions after 6.10 of Edubuntu, this is already done for you, and sound should work on client machines out of thebox.Printing over LTSPThere are two ways in which printing can be achieved in an LTSP environment. The first is for a printer to be connected directlyto the server.

In this instance, printing is set up in the usual way. You can find more details on this in Chapter 4.The second way to allow printing is to make one of the workstation machines a print server. This feature was introduced inUbuntu Edgy 6.10. Adguard premium license key free. Up to three printers can be attached to the workstation using the parallel and USB ports. LTSP uses thejetpipe program on the workstation to redirect printing from the server to the workstation. In order to attach a printer tothe workstation, a change must be made to the /opt/ltsp/i386/etc/lts.conf file. The following is an example of some configurationoptions.00:4C:69:73:61:00PRINTER0DEVICE = /dev/lp0PRINTER1DEVICE = /dev/usblp0This will cause the jetpipe program to begin running as a background process and will open ports 9100 and 9101, where it willlisten for a print stream from the server.

This stream will then get redirected to the printer attached to the parallel port on the computer.In this example, we use the client’s MAC address to identify it on the network. Unless you know the MAC address of the clientmachine that the computer is connected to, you will need to run the following command to find it. When the client boots up,it will display its IP address in the bottom right of the login screen. Simply replace the in the following chunk of code with that IP address to find the MAC address of the client machine.IP=; ping -c1 $IP grep 'NULL'; arp -a grep $IPHere is an example: pete@ubunt:$ IP=192.168.16.5; ping -c1 $IP grep 'NULL'pete@ubunt:$ arp -a grep $IP? (192.168.16.5) at 00:12:50:30:5A:E5 ether on eth0pete@ubunt:$All that is needed now is to create the print queue on the server, so that the client machines know the printer exists.

Thiscan be done in the usual way of adding a printer as shown in Chapter 4. The jetpipe program allows the workstation printer to be identified as an HP JetDirect system. To add the printer to theserver, you will need to enter the IP address of the workstation and the port that the jetpipe service is listening on. Thefirst printer you connect to a workstation will be on 9100, the second on 9101, and the third on 9102.Using Other Window Managers with EdubuntuUsing other window managers with Edubuntu is easy. With versions from Edubuntu Edgy 6.10 forward, adding a window managerwill result in a new option being present in the LDM login screen.

This will allow you to choose which window manager to usewhen logging in. In order to use a new window manager, you must install the appropriate package. You have the following choices:. xubuntu-desktop: a lightweight window manager, perfect for lower-end systems. kubuntu-desktop: a feature-rich window manager. ubuntu-desktop: the standard window manager, used by defaultTo install one of these packages, you should first load a terminal window, using the Applications Accessories Terminallink in the main menu, and then use the following command.sudo apt-get install xubuntu-desktop.