On Jo, 18 feb 21, 08:15:39, Dan Ritter wrote:
Richard Hector wrote:
> On 18/02/21 5:22 am, Greg Wooledge wrote:
> > On Thu, Feb 18, 2021 at 12:06:37AM +0800, Kevin Shell wrote:
> > > You could stop one and start the other,
> > > there's no resources or port conflict.
> > > I want to just keep both, not run them at the same time.
> >
> > Again, as stated at the start of this fiasco of a thread, Debian policy
> > says that all daemons must be started up by default.
>
> It is possible to install both nginx and apache2 at the same time. Both
> presumably try to get port 80? Not sure how that resolves; I don't have a
> machine I want to try it on at the moment.
The order of events is:
- install one. Change the listening port to something other than
80.
- install the next.
Web servers are built to interoperate with each other; it is not
ridiculous to have a dozen web servers on a machine each
listening to different ports, or listening on sockets and being
proxied by a different web server.
It seems to me the important difference is that it is comparatively easy
and common to interact with a webserver on a non-standard port, whereas
running a SMTP server on a non-standard port might be useful only in
very specific corner cases.