Linux – How to Setup a Shared Data Partition for Multiple Linux OSes

Not sure exactly what your question is. Can you be more specific? Specifically, I'm having difficulty parsing

I want a /home/shared where raul & ricardo have permission over this folder, maybe www-data and root, but any other user on any linux distro.

Do you want to know how to set up a shared folder/partition? If so, you could just set up a group in each installation with the same group id. Then perhaps use acl to make sure group has rw permission to the partition.

man addgroup says

A GID will be chosen from the range specified for system GIDS in the configuration file (FIRST_GID, LAST_GID). To override that mechanism you can give the GID using the --gid option.

So you could do

addgroup [options] [--gid ID] group

where group and ID is the same in both installations.

For a tutorial about acl see Using ACLs with Fedora Core 2, and see my answer to a recent question about sharing a directory between two users. Obviously, you'll need to mount the partition with acl support on both installations.

Once acl is set up, all files and directories in the folder will have group permissions rw and so raul from one installation and ricardo from the other installation will both be able to read and write to that folder.

EDIT: In response to raul's comment below:

If I understand your question correctly, and you are trying to share data between two www-data users on two installations, then this a slightly different question than the one you seemed to be asked with raul and ricardo, because in this case, the users would be the same.

www-data would be typically created by a web server installation like apache, so creating them with matching ids would be difficult unless it was already the case (see below). I think there should be no problem in altering the uids/gids after the event to match, but I'm not 100% sure about that. Perhaps the experts here can advise.

Note that Debian defaults to uid/gid=33 for www. It is possible it would not be the same for other Linux distributions. However, if your installations were both the same distribution, the ids would very likely match. Indeed, if this were the case, you could just use the www-data group as your group, and you would not have to do anything.

Running apt-cache search windows registry on Debian to look for packages that may suit your purpose brings up five candidates. You can make a similar search on packages.debian.org, or search on the Debian packages site (use the “search package directories” form, and make sure to select “descriptions”).

Chntpw was developed to change a forgotten Windows administrator password, but it can view and edit any registry entry. There's a boot CD on the site.

Hivex is a library for accessing Windows registry hives. It's part of libguestfs, a suite of tools to work with virtual machine images from the host. It comes with command line tools to extract and edit registry entries. It supports BCD hives.

Parse::Win32Registry is a Perl module for reading Windows registry files.

RegLookup is a small utility to read Windows registry hives.

Samba comes with tools to access the Windows registry: editreg in Samba 3, and regshell and more in Samba 4. In Debian (only unstable right now), they're in the registry-tools package.