Help with installation

[Sasha Tsykin]

Mateusz Kijowski wrote:
>> There is no su in Ubuntu.
>>     
>
> This is *not* true.
>
> $ dpkg -L login | grep bin/su
>    /bin/su
>
> Also, doing su <username> works as expected.
>
>   
su exists in ubuntu, but is not enabled by default. this means that 
unless you activate it, you can not use the su account. Instead you use 
the sudo command which emulates the su account. The su account can be 
activated by setting a root password.

Sasha