[HanoiLUG] Ubuntu-sudo usage..

[Le Xuan Thao]

> 
> >In the old days, an unauthorized user as root could steal/destroy the
> >data of all users, as well as bring the system down, but as an
> >unprivileged user, could only steal/destroy that one user's data.  But
> >now, there only *is* one user.
> Not sure what you mean?  Linux is still just as much a multi-user
> system as it ever was.  The difference is that sudo allows individual
> users to gain elevated permissions without having to share a password
> among everybody.  Note also that sudo's permissions can be very finely
> tuned - you can grant one user permission to run one command only if you
> so wish.
> 
What he meant is that when you are the only user of the system then
system files do not matter as much as in multi-user systems. Your
personal files are much more important. If your account is compromised,
it's end of story, while in multi-user systems other users can still
work normally as long as the attacker does not have root priviledge. So
in one-user system su or sudo could be considered as warning when you
try to do something that might be dangerous. The "extra protection" is not
much since there is no other user to protect. That makes sense to me.
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