Bruno Pereira's questions

Ubuntu MAAS, very cool, awesome in fact, looks like a unique tool for several jobs.

It looks free, but part of its documentation starts already with clauses that would scare anyone with interest in it:

• Documentation is copy righted by Canonical;
• Documentation must be used only for non-commercial purposes;
• If documentation is distributed within the non-commercial clause you must retain copyright;

It just sounds a lot for a guide on how to install MAAS + Juju + Openstack and that scares me a bit. Why does documentation built from the community prevent me from doing anything except look at it? We produce a guide, but I cannot take it to work and look at it or show it as a possible tool that my company would be interested in using or contributing to?

My question is then: Under what license is Ubuntu MAAS distributed and what would be the reasoning for being so worried about copyrighting a simple guide like that so heavily? Is Ubuntu MAAS free?

Sometimes, after installing an application (Codeweavers Crossover to be more specific on this case) it fails to show on the Dash until you logout and back on. That happens with Unity and GNOME Shell, remember that with GNOME Fallback it is automatically added as a menu.

Is there a command that allows one to force a refresh on the cached application launchers in the Unity Dash or the GNOME Shell desktop environments?

I am looking for certification on Ubuntu server technology or possibly Debian (as long as its supplied by Canonical, is that even possible?) which Ubuntu is based on.

Is there such a thing provided by Canonical? In what regions are these services available? Can someone get Ubuntu training and certification the same way Red Hat and other companies supply? Where can I get more information on this matter?

_{I think this is kernel dependent and probably will change over time depending on the kernel a release uses, correct me if wrong}

I'd like to know two things for all the currently supported Ubuntu releases:

How many maximum CPUs can Ubuntu handle (by default) at the same time with a standard desktop kernel? Is that count different from a server kernel and 32bit/64bit systems?

Where can I find that information on my system?

Every time I set up a cron job there is something wrong with it and I spend a lot of time trouble shooting it.

I use Ubuntu and I would like to know what tools exist to make my life easier when setting up cron.

Possible Duplicate:
How to stop using built-in home directory encryption?

During installation I have chosen to encrypt my user's home folder.

Can I un-encrypt it? How would I do that? I just want it to be "normal" again.

I know how to check if a package is installed and if its available for install but I cannot find any list of packages that are installed with a release from Ubuntu.

Sometimes I am trying to answer something and I cannot remember if the tool I will refer was installed by default of if I installed in a later point and cant remember. What if its something I have and a user using another desktop environment does not?

I know I can recommend to install the package prior to asking him to use it but I would like to know if its installed by default or not.

Is there such list? Where can I find it?

I have a package I do not want to be installed even if another needs it.

Is there any way to "blacklist" a package from being installed even as a dependency of another?

Can I overcome the fact that it is a dependency and still be able to upgrade my system?

I am thinking in particular about the messaging indicator from Unity. If I remove it and add Unity again for some reason, I dont want the applet installed again. How can I prevent it from being installed? (or the global menu, java versions removing my custom installed one, etc... you get the idea).

I have read about the Unity HUD.

Is that a mock up or a real thing? Can I install it on my current Ubuntu 11.10 installation or do I need to upgrade to 12.04?

I know that Ubuntu receives funding via support, merchandize, hardware company agreements, etc, but many projects out there offer the option to donate directly allowing and supporting further development and releases.

Is that option available for Ubuntu? How can I donate to Ubuntu if that is an option I would like to follow?

Following this question I have have installed a minimal Ubuntu system on my computer.

I want to install the minimum packages possible the cleanest xfce desktop possible.

What are the minimal packages possible necessary to run a working minimal xubuntu desktop and how do I install them?

Do I need a login manager to run the desktop when I am done installing?

Will Ubuntu TV run on all available desktop environments? Which environments will Ubuntu TV run on?

As the titles says, what is Ubuntu TV and what are the main differences / advantages compared with any media center out there?

I am looking for the logs of the freenode juju charms class that occurred on the 2nd of December, 2011.

Do they exist? Where can I find them?

What is meant by "depends" and "pre-depends", and the difference between those 2 types of package requirements when I am installing something in Ubuntu?

I am trying to understand the hooks for a juju charm, some of them are rather obvious and easy to understand (start, stop, install,etc), others not really.

How many hooks are there, when are they called, for what function?

I am looking for a good list of hooks and their descriptions.

What is a Juju Charm? What is it used for?

I use Virtual Box a lot for distro / applications testing purposes.

One of the features I simply love about it is virtual machines snapshots, its saves a state of a virtual machine and is able to restore it to its former glory if something you did went wrong without any problems and without consuming your all hard disk space.

On my live systems I know how to create a 1:1 image of the file system but all the solutions I'v known will create a new image of the complete file system.

Are there any programs / file systems that are capable of taking a snapshot of a current file system, save it on another location but instead of making a complete new image it creates incremental backups?

To easy describe what I want, it should be as dd images of a file system, but instead of only a full backup it would also create incremental.

I am not looking for clonezilla, etc. It should run within the system itself with no (or almost none) intervention from the user, but contain all the data of the file systems. I am also not looking for a duplicity backup your all system excluding some folders script + dd to save your mbr. I can do that myself, looking for extra finesse.

I'm looking for something I can do before doing massive changes to a system and then if something when wrong or I burned my hard disk after spilling coffee on it I can just boot from a liveCD and restore a working snapshot to a hard disk.

It does not need to be daily, it doesn't even need a schedule. Just run once in a while and let it its job and preferably RAW based not file copy based.

I have an ATI graphics card and I want to know if it is supported and what kind of drivers should I be running to get the best features out of it.

Is my card supported in Ubuntu and what drivers will work with my card?

I am looking for the specs necessary to build a .desktop file to be used in Ubuntu 11.10.

Many terminal applications or even GUI application do not show on Open with other application tab anymore and I want to create a .desktop file that makes that application be listed on the list again.

I know that you can create a .desktop file and place it in ~/.local/share/applications but I do not know what all those settings mean.

Is there a guide that allows me to customize my .desktop files to my needs?