su, su -, sudo

[Ankush Grover]

On 8/29/06, Gayal <gayal.rupasinghe at gmail.com> wrote:
> Wuts the different between su, su - root and sudo ?
>
> --
>
hey,

If you use su you will still have the same enviroment, for example the
$PATH variable, as the user who su'd.

If you use su - you will have the envioroment of the user you su'd to.

the diff between "su" and "su -" is "su -" you log in as a root with
the env setting/profile (i.e you really log in as a root). just type
"pwd" and you will be in the root home dir @ /root.

if you "su" only then basically you just "borrow" the root permission
without having all the root env setting/profile . just "su" from your
home dir and type "pwd", you can see that you still in the user dir
i.e /home/user


For sudo read this

http://www.tech-faq.com/sudo.shtml

Regards

Ankush Grover