dapper sudo

[Jack Bowling]

On Tue, Jul 04, 2006 at 02:44:14PM +0100, Toby Kelsey wrote:
> boricua wrote:
> >how come dapper does not allow me to do this
> >
> > sudo cat /dev/null >  /var/log/apache2/error.log
> >
> 
> Because the sudo only applies to the command 'cat', not the redirection.
> 
> Try
>   sudo dd of=/var/log/apache2/error.log < /dev/null
> or
>   sudo tee /var/log/apache2/error.log < /dev/null
> 
> 
> It is a bug that there is no obvious command to truncate a file.


Could somebody tell me if there is any difference between the above cat
command and 

[sudo] echo "" > /var/log/apache2/error.log

assuming one has sudo'ed to a root shell?

Jack