Can Linux do this?

[RobinVossen]

Hello all.

I have been thinking what Linux cant do.
And well it can do nearly everything.
And I also think It can do this. but I have no idea.

I want to know if Linux can:
- Simulate Active Directory
- Make a all the other users Invisible for each other. Eg the /home will onyl contain them selfs as will the /etc/passwd
- Make user x able to execute file 1 make user y able to edit the file and make user z unable to see the file at all.
- Crash when you dont touch it.

Can theses things be done with Linux?

Thanks

Cheers,
Robin

[Kieren]

- Make a all the other users Invisible for each other. Eg the /home will onyl contain them selfs as will the /etc/passwd

To hide everyone's home directories just change the permissions to be readable only to the owner. I don't think you can hide the users from the /etc/passwd without stopping users from reading all of the file.

[daark.child]

For Active Directory, checkout LDAP (openldap is the name of the package).

[Cabhan]

I suspect that 2 and 3 could be done with a chroot jail. chroot changes what your / directory is, so with a cleverly set-up sandbox, you can create any type of environment that you wish.

[RobinVossen]

Ok, thanks This is all I needed to know.
I knew I could do 2 with Chroot.
But well my Teacher didnt belive me.
So, thanks to you all I have something to put under his nose and make him say 'Sorry'! =)