On Mon, Dec 23, 2024 at 20:48:12 -0500, Dan Purgert wrote:
> On Dec 23, 2024, Timothy M Butterworth wrote:
> > sudo fails with a permission denied error.
> > tmb@hp-debian:~$ sudo /usr/sbin/iptables-save > /etc/iptables/rules.v4
> > bash: /etc/iptables/rules.v4: Permission denied
>
> "sudo" only modifies "iptables-save", and not the redirect (it happens
> as your user, *before* the invocation of sudo, as I recall).
Correct. Redirects are done by the shell, not by the command the shell
executes. The command inherits the redirection.
> You'll need something like this, so that rules.v4 is opened as root
> rather than your user:
> sudo /usr/sbin/iptables-save | sudo tee /etc/iptables/rules.v4
Or:
sudo sh -c '/usr/sbin/iptables-save > /etc/iptables/rules.v4'
