I want to store the redirected folders of 40-50 roaming users on a Linux server, is it possible and safe ? I really need to get those folders out of my Domain Controller, and I got only linux servers. Thanks !
Assuming you're using SAMBA, then sure. It will work. It's probably not an ideal situation, though. If you ever run into any issues with it, you won't be able to turn to Microsoft for support, which is a deal-breaker for many people.
Can you tell us more about the Linux servers you have? Aside from the best-practices reasons of not running file storage on your domain controller(s), why do you need to get your data off of them? Is this a space issue? A stability issue?
You have options on the Linux side. Samba can work as a file store and can be mostly-integrated with your domain.
If this is simply a space issue, some level of virtualization may work, or you could even go with an esoteric solution like exporting iSCSI from the Linux systems.
All in all, we don't know what you have available to you. If the file storage is important, is there any reason you could not dedicate hardware to the purpose?