about xhost,and sam

[常有慈悲心]

1. what's mean of xhost+ ?what's the relation about xhost + and current user?

i use user1 to login ,and su - root
,when use sam -display hp13:0.0,

it tells must use xhost +
and i must return user1 to issue xhost + hp13:0.0

why?
2.why:when run sam ,there is no "cluster" program icon in the sam,
but use sam -r,there is a "cluster" program icon ?

[Sridhar Bhaskarla · Accepted solution]

Hi,

'xhost' command manages authorization where you can allow remote x-programs to connect to your DISPLAY. When you login yourself in CDE, then *only you* (not your root session) on the local system will have the authority to run 'xhost' program. You have to login as root into your CDE if you want to run xhost as root.

To show it, start a new terminal, telnet to another system.

Terminal 1:

$telnet
$export DISPLAY=:0
$xclock

You should see an error 'connection refused' message.

Start another terminal and run 'xhost + '

Now run 'xclock' on the remote system in Terminal 1. you should see xclock of the remote system displayed on your local DISPLAY.

2. sam -r shows only the functions allowed and it may not have exactly the same root windows like sam. It may display the sub root programs as root icons depending on how the access is configured.

-Sri

[Sunil Sharma_1]

X host is server access control program for X-windows. USing this you can control X-windows permission on clients. run xhost + on console before running xhost application like sam -display hp13:0.0

Sunil