DoubleVision® Pro
Quick Start

Installation

Installing DoubleVision Pro on UNIX/Linux

This section explains how to install the DoubleVision Pro UNIX components on your UNIX/Linux servers.

Installing an Upgrade

If you are installing an upgrade version, you will be prompted to confirm backing up and saving various DoubleVision Pro data. Typically, you should type y to confirm the backup.

Terminal Type Collector

During the installation, you will be prompted to confirm installing the Terminal Type Collector. Installing this component is optional but recommended. This software builds a database to allow DoubleVision Pro to accurately identify the terminal types used by users.

Installing Digiboard Support (SCO UNIX and Linux Only)

If you install on SCO UNIX or Linux, during the installation you will be prompted to install DoubleVision Pro software support for Digiboard's I/O board. This software provides a trigger that gives control back to the kernel. If your SCO or Linux system uses a Digiboard I/O board, it is strongly recommended that this software support be installed.

Installation Instructions

  1. Browse to the Tridia web site (www.tridia.com) or ftp site (ftp.tridia.com) and download the DoubleVision Pro UNIX/Linux distribution for your UNIX/Linux operating system version.

    Example: For Linux, the distribution file is named dvpro-linux-intel.tar and is in the linux-intel directory.

    Note: Many popular Window's based ZIP file utilities do not properly extract the contents of our distribution file. Please do not attempt to use them with any of the distribution files.

  2. Place the downloaded file in your home directory on the UNIX or Linux server where you want to install DoubleVision Pro.

    Example: 

    /home/username/
    where username is your actual user name

  3. Log on as root to the UNIX or Linux system.

  4. Change to the /tmp directory. 

    cd /tmp [Enter]

  5. To verify the presence of the distribution file, list the directory contents of your home directory: 
    ls -l /home/username/*.tar [Enter]
     where username is your actual user name

  6. Extract the distribution (*.tar) file: 
    tar xvf /home/username/<filename> [Enter]

    Several files are extracted into the /tmp folder. One of these is the install script.

  7. Run the install-dvpro file. 
    ./install-dvpro

    A Welcome screen is displayed.

  8. Verify that you have the correct UNIX/Linux version, then type y to proceed.

  9. Follow the onscreen prompts to complete the installation.

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Using DoubleVision Pro on UNIX/Linux

This section explains how to use the DoubleVision Pro software on a UNIX or Linux computer. The DoubleVision Pro UNIX/Linux version runs on the server and enables viewing and remote control of terminal sessions running on that server.

Starting DoubleVision Pro on the Server

To start DoubleVision Pro on the UNIX/Linux server:

  1. Log in and be at a shell prompt (i.e., %, #, etc.)

  2. Type the following after the shell prompt: 
    dv <Enter>

    The DoubleVision Pro screen is displayed. It consists of a Main Menu bar and the Terminal Information window, which displays information about the host terminals.

Attaching to a Terminal

  1. Highlight the terminal you wish to view in the Terminal Information window using the [UP ARROW], [DOWN ARROW] and [PG UP], [PG DOWN] keys.

    Hint: For this initial attempt, do not select a terminal with a user name of AT LOGIN. These are terminals which users have not logged into yet and are at the login prompt. If you select a terminal in this state, you will simply see the login prompt.

  2. Type [V] for the View option, or you may use the [—>] and [<—] keys to highlight the View option and press [ENTER]. The screen clears and you are attached to the selected host terminal. You now begin seeing any activity on the host terminal. Both your keyboard and the host user's keyboard are operational. Therefore, you can enter keystrokes at the same time the host user does.

    Note: By default, remote Linux users see trigger execution messages displayed on their screen as they connect to a host terminal.

  3. Press the Screen Switch Hot Key to stop viewing the host terminal and return to the DoubleVision screen: [CTRL]+[Z].

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Preattaching Terminals

Another way to set up a connection is to preattach; that is, attaching to the host user's terminal before he logs in. Preattaching assures that the DoubleVision Pro TrueScreen and Instant Replay options are activated.

Note: Only the root user can preattach to an AT LOGIN terminal, unless special permission has been granted to a remote user. There are three ways to preattach to a host user's terminal before he or she logs in.

  • The first is to highlight the desired AT LOGIN terminal in the Terminal Information window and issue the Preattach command (Terminal > Advanced > Preattach). Normally there are multiple terminals on the system that have not logged in. Make certain you are selecting the correct one. The best way is to find the terminal by its tty name.

  • The second method is to attach when the user logs in by executing the preattach command from the host user's .profile or .bash_profile file.

  • The third method is to use the /usr/lib/dv/installpre script to automatically update all .profile, .login, .bash_profile, and/or .bash_login scripts in user home directories to call preattach.

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Opening a Chat Window

While you are actively viewing a host terminal, you can open a Chat Window to converse via the keyboard in real time.

  1. Press the Screen Switch Hot Key and then the Chat Window Hot Key: [CTRL]+[Z] then [CTRL]+[C].

    A Chat Window opens on both the host and remote user's screen. The running application is frozen.

  2. Type a message to the host user. DoubleVision identifies you by your name and tty address. When the host user types a response, he is also identified by user name and tty address.

  3. To close the Chat Window and return to the Main Menu, press the Screen Switch Hot Key: [CTRL]+[Z].

    The Chat Window closes. The remote user is returned to the DoubleVision screen. The host user's application is unfrozen and continues running.

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