AccessGrid.org

Handy Tips and Tricks

The following "Handy Tips and Tricks" can be found below:

  • More than 3 kernels when yum updating
  • Killall AG Script
  • Configuring Remote Desktop (Gnome)

More than 3 kernels when yum updating

By default, when doing yum updates, only 3 kernels remain after the update. Example, current kernel that you are running and the new updated kernel with any existing kernel versions being removed. Sometimes you might want more than 3 kernels, for testing or any other reasons.

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Troubleshooting Tips

Video Issues

Video transmission video appears green, interlaced or colour chrominance is ghostly.

This is generally caused by having the input device signal incorrect. Example, PAL is the default for most cameras in Australia, whereas NTSC is the default in the U.S.

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Installing Multicast Beacon (DBeacon)

DBeacon is a useful tool to help you debug your multicasting problems. It provides useful information regarding a particular multicasting group’s connection activity.

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Configuring a Unicast Bridge

A Unicast Bridge allows sites that do not have functioning Multicast to participate within an Access Grid session. Through the Venue Client, users can connect to your Unicast Bridge that has been configured. This guide is designed to demonstrate how to configure a Unicast Bridge for AG 3.

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Installing Other Useful Software

Adobe flash-plugin

This software enables flash websites to work with the firefox webbrowser. To install this software, simply perform the following instructions:

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Setup For Access Grid Toolkit 3.x

The first time you run the Access Grid software, the "Venue Client", you will have to perform some configurations to operate your video/audio devices. The following guide provides information on how to setup the Access Grid Toolkit 3.x for the first time.

Setting up the Venue Client

This section of the guide details how to setup the Venue Client.

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Getting the Sound Working

The following steps provides information on how to get audio working on an Access Grid

Getting the sound working for your Access Grid will probably be the most difficult part of this whole process. The setup will vary, as many computer workstations generally will have different sound cards.

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Configuring AG Service Managers (Multi-Node Configuration Only)

This section will describe how to configure and setup AGServiceManagers to be running when non display machines are logged in.
 

When running a multi-node configuration for the Access Grid, each machine that doesn’t run the Venue Client, ie, any machine that isn’t the display node, requires the “AGServiceManager” to be running so that the VenueClient can externally sta

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Configure Networking

These instructions have been provided to assist with getting networking operational by upon start-up.

By default, if not configured during the installation process, a networking device will need to be enabled toallow a network connection to be active.  The following instructions demonstrate how the network device eth0 (generally the standard wired network connection device) can be enabled upon start-up.

  • Within the Gnome menu, select System > Preferences > Network Connections.

or

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Why Scientific Linux?

For those who are familiar with my install guides, I have been producing Fedora install guides for many years. With recent Linux distributions, there has been a number of issues with the Access Grid software (particular ally since Fedora 14), with some testing pointing to versions of python-twisted causing some of the problems

 

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