Purpose

Italc is a program that allows an instructor to control actions of a computer lab's workstation.

Some features of Italc Include:

Classroom Manager (Overview Mode) - Allows teacher to view all student's Desktop / Applications
Remote Desktop Control - Allows teacher to control the student's Desktop and lock-out student's access to computer session
Snapshots - Allows teacher to take snapshot of student's Desktop / Applications
Demo Mode - Allows teacher to broadcast their desktop session on student's computers (eg. demonstrations)
Wake-up-on-LAN - Allows teacher to power-up all workstations
Shutdown Mode - Allows teacher to logout and power-down workstation's CPU.

Here is a link to the Italc WIKI (for more background information):

Installing Italc

Use the synaptic package manager to install the following programs"

Here is a WIKI on how install applications using the Synaptic Package Manager: [ Install Applications in Ubuntu ]

There is a lot of conflicting information on the Internet regarding the setup of the Italc application.

The following procedure works with the Edubuntu system (with LTSP)...

Steps:

Login into the administrator account.
Create an account called teacher. This will be the master account to control the other accounts.
Open a shell terminal.
Edit the sudoers file to allow the account teacher to be able to run sudo (administrative) commands by following the steps below:

Type sudo sudovi
Enter your administrator password.
Under the section called "# User Privilege Specification", add a line under "root ALL=(ALL) ALL" to read:

teacher=(ALL) ALL

Save your file by pressing CTRL-x, then press y for yes, and accept the default file pathname.
Exit your shell, and logout of the administrator account.
Login to your teacher account.
Open a shell terminal.
Enter the following Linux commands:
- sudo addgroup italc
- sudo adduser teacher italc
- sudo chgrp -R italc /etc/italc/keys
- sudo chmod -R 640 /etc/italc/keys/private
- sudo chmod -R ug-x /etc/italc/keys/private
Copy the contents of the file: /etc/apt/sources.list
(you can do this by issuing the command cat /etc/apt/sources.list, then scroll terminal to the beginning of the file, then drag the mouse to the bottom, then click EDIT -> Copy on the terminal menu.
sudo chroot /opt/ltsp/amd64
vi /etc/apt/sources.list
apt-get update
apt-get install libitalc italc-master
Enter insert mode, then click Edit -> PASTE from terminal menu. Save and exit file
vi /usr/share/ldm/rc.d/S20-ica-launcher
Enter the following lines in this file:

#!/bin/sh
/usr/bin/ica &
true