Raul Suarez's blog

byobu or Checking your update manager package descriptions

I use Mint, an Ubuntu derivative, and every time I get a notification that there are updates available, I go check the list of updates.

I do this with several purposes in mind:

  • First and foremost, I want to know what gets updated in case something stops working.
  • Second, I want to see how many there are and how large to evaluate how long it's going to slow down my (old) computer
  • and third, to learn a bit about the packages I have installed

Ubuntu Lucid Lynx printer troubleshooting wizard was quite helpful

In my previous post I explained how to install the Lexmark printer drivers in Ubuntu/Mint.

What I left out was how was I able to very easily identify what was the problem when all was finally installed and things weren't working.

It really came down to the Printer troubleshooting wizard included in Ubuntu/Mint.

Installing a Lexmark x1155 using the z600 driver

Summary:
I've created a small script that does most of the work for me. I've used it successfully on varios versions of Fedora, Ubuntu, Mint and Puppy Linux, so I am certain that it should work in most distributions.

Here are the step by step instructions:

  1. Ensure that the following commands are installed, if not, install them using your distribution regular mechanism: rpm2cpio, cpio, ldconfig. e.g. sudo aptitude install rpm2cpio

Finding Samba shares mounted by Nautilus

Every now and then I have the need to access a folder shared in a remote computer at home. I normally mount it by hand in the command line using the standard commands:

mount -t cifs -o <username>,<password> //<serveraddress>/<sharename> <mountpoint>
or
smbmount //<serveraddress>/<sharename> <mountpoint>

but this time I wanted to mount it using Nautilus so I entered the URI in the location bar

smb://<serveraddress>

Installing WebHuddle

This will be the shortest post from this series.

To install WebHuddle I followed the instructions from the WebHuddle User Guide

There you will find all the steps in detail and a wealth of extra information regarding the WebHuddle configuration.

I did my installation on a minimal Debian install and the instructions worked for me.

Installing OpenMeetings on Debian Lenny

On the previous post I showed you what you could do with OpenMeetings. Now it's time to describe how to install it on your own server.

Although you can install it in any version of Linux provided you have access to the proper dependencies, I decided to do the set up on a minimal installation of Debian 5.03 "Lenny", that way I could ensure I identified all the components needed. This will also ensure that if you want to install it in a different Distribution, you have all the elements to do it.

Web conferencing

All the tools and methods described on the previous posts work very well with a small number of people sharing a desktop or collaborating, given that access must be granted and computer addresses shared, they work well within a trusted group.

For situations where you need to collaborate with "untrusted" people or with a large number of people, the best option is to use web conferencing software.

NX

On my post about XDMCP I mentioned that there was a better way to open a X session on a remote computer.

After reading this post you'll see why I left it at the end of this blog therad: NX uses elements and concepts explained on the previous posts (SSH, X forwarding, XDMCP, VNC)

VNC (Virtual Network Computing )

Up to now the graphical solutions I've shown were focused on accessing the X desktop. I've also focused on accessing a session exclusively.

On this post I will talk about a tool that is OS independent. You can share a Mac or Windows or Linux desktop and that allows remote collaboration with multiple people looking and controlling the same desktop.

VNC uses the RFB protocol to transmit keyboard and mouse signals to remote computer and receive back the graphical screen.

XDMCP

XDMCP stands for X Display manager control protocol.

The display system used in Linux was designed from the beginning as a network protocol, where the system and programs run in one computer and the display being shown on another.

The XDMCP protocol allows you to login graphically to a remote computer.

It is not a very fast protocol and these days there are better ways to achieve the same effect in a more efficient manner.

As of Gnome 2.2 and KDE 4 support for XDMCP login on the GDM/KDM login screen was dropped.

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