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Re: apache2 missing a file, won't run.

On Mon 06 May 2019 at 09:43:16 -0400, Greg Wooledge wrote:

> On Sun, May 05, 2019 at 05:16:04PM -0400, Gene Heskett wrote:
> > FYI I am a member of the lpadmin group. Whats next? reboot to make it 
> > take effect?
> Log out and back in to acquire the new privileges in your interactive
> session.

Indeed. It's standard procedure when a user has been added to a group.
> However, in the case of CUPS via loopback HTTP, I don't know whether
> that's actually required.  The CUPS daemon may take the privileges
> directly from the /etc/{passwd,group} files.

It is required and conspicuously documented for all users, including
experienced ones, if they can be bothered to do read it. For example,
in the cups README.Debian.

  'Administration' is where you need to be to set up a local print queue.
  At some point you will be required to authenticate. A User Name of 'root'
  and root's password is always acceptable. Any other user must be a member
  of the lpadmin group.