Re: addendum, Re: One-user system.

From	Klaus Singvogel <deb-user-ml@singvogel.net>
Newsgroups	linux.debian.user
Subject	Re: addendum, Re: One-user system.
Date	2022-02-11 15:50 +0100
Message-ID	<DPFpf-164h-3@gated-at.bofh.it> (permalink)
References	<DPuDv-ZBX-1@gated-at.bofh.it> <DPuNb-ZF1-3@gated-at.bofh.it>
Organization	private

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Greg Wooledge wrote:
> On Thu, Feb 10, 2022 at 06:37:04PM -0800, peter@easthope.ca wrote:
> > root@joule:~# su peter
> > peter@joule:~$ firefox-esr --display=:0
> > Invalid MIT-MAGIC-COOKIE-1 keyUnable to init server: Could not connect: Connection refused
> > Error: cannot open display: :0
> > 
> > peter, logged in directly, can run firefox.
> > root, logged in directly, can run firefox.
> > The above is from a security mechanism in firefox?
> 
> No, you simply haven't provided enough credentials to the X server.
> It's the X server who's rejecting connections from "peter", because
> "peter" has not presented the correct MIT-MAGIC-COOKIE (auth token).

A different solution, with less security, especially on multi-user system might be:
enable access for a specific user by "xhost".

In your case, do before "su peter", as user root:
	xhost +si:localuser:peter

This prevents the X server security mechanism, which Greg explains.

Beaware, it's more dangerous, opening it X this way.

Best regards,
	Klaus.
-- 
Klaus Singvogel
GnuPG-Key-ID: 1024R/5068792D  1994-06-27

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Thread

addendum, Re: One-user system. peter@easthope.ca - 2022-02-11 04:20 +0100
  Re: addendum, Re: One-user system. Greg Wooledge <greg@wooledge.org> - 2022-02-11 04:30 +0100
    Re: addendum, Re: One-user system. Charles Curley <charlescurley@charlescurley.com> - 2022-02-11 05:50 +0100
      Re: addendum, Re: One-user system. Greg Wooledge <greg@wooledge.org> - 2022-02-11 13:40 +0100
        Re: addendum, Re: One-user system. <tomas@tuxteam.de> - 2022-02-11 14:00 +0100
        Re: addendum, Re: One-user system. Charles Curley <charlescurley@charlescurley.com> - 2022-02-11 17:50 +0100
    Re: addendum, Re: One-user system. Klaus Singvogel <deb-user-ml@singvogel.net> - 2022-02-11 15:50 +0100

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