Boston Linux & UNIX was originally founded in 1994 as part of The Boston Computer Society. We meet on the third Wednesday of each month at the Massachusetts Institute of Technology, in Building E51.

BLU Discuss list archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Discuss] memory management

On Sun, Jun 21, 2015 at 03:18:03PM +0200, Bill Bogstad wrote:
> On Sun, Jun 21, 2015 at 1:10 PM, Jerry Feldman <gaf at> wrote:

> I'm curious though, how this other user account gains access to your
> X server.   Allowing other user ids to write on your screen/capture
> key & mouse events seem to me to be a potential issue.

Only if someone else can log in as that user.

It's been my experience that I didn't need to fix display access, but
maybe it's because typically I'm switching to root.  But if you need
to, it's not hard... just arcane.

$ xauth list
myhost/unix:0  MIT-MAGIC-COOKIE-1  <cookie_value>


1. su - other

2. make sure XAUTHORITY is not left over from your original UID:

$ export XAUTHORITY=/home/other/.Xauthority # or whatever

3. make sure that file exists

$ touch /home/other/.Xauthority

4. add the cookie you got from your original UID

$ xauth add myhost/unix:0  MIT-MAGIC-COOKIE-1 <cookie_value>

Should now work fine, without allowing access to anyone else on the
box.  Just tested it in my Ubuntu VM, closed WORKSFORME. ;-)

Derek D. Martin   GPG Key ID: 0xDFBEAD02
This message is posted from an invalid address.  Replying to it will result in
undeliverable mail due to spam prevention.  Sorry for the inconvenience.

BLU is a member of BostonUserGroups
BLU is a member of BostonUserGroups
We also thank MIT for the use of their facilities.

Valid HTML 4.01! Valid CSS!

Boston Linux & Unix /