Red Hat ENTERPRISE LINUX 5 - VIRTUAL SERVER ADMINISTRATION, Руководство по установке

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Problems After Installation
229
Finally, if you are still facing problems related to this error, register your product and contact our
support team. To register your product, go to:
http://www.redhat.com/apps/activate/
21.3. Problems After Installation
21.3.1. Remote Graphical Desktops and XDMCP
If you have installed the X Window System and would like to log in to your Red Hat Enterprise Linux
system using a graphical login manager, enable the
X Display Manager Control Protocol
(XDMCP).
This protocol allows users to remotely log in to a desktop environment from any X Window System
compatible client (such as a network-connected workstation or X terminal). To enable remote login
using XDMCP, edit the following line in the
/etc/gdm/custom.conf
file on the Red Hat Enterprise
Linux system with a text editor such as
vi
or
nano
:
Add the line
Enable=true
, save the file, and exit the text editor. Switch to runlevel 5 to start the X
server:
/sbin/init 5
From the client machine, start remote X session using
X
. For example:
X ­:1 ­­query s390vm.example.com
The command connects to the remote X server via XDMCP (replace
s390vm.example.com
with the
hostname of the remote X server) and displays the remote graphical login screen on display
:1
of the
client system (usually accessible by using the
Ctrl
-
Alt
-
F8
key combination).
You may also access remote desktop sessions using a
nested
X server, which opens the remote
desktop as a window in your current X session.
Xnest
allows users to open a remote desktop
nested within their local X session. For example, run
Xnest
using the following command, replacing
s390vm.example.com
with the hostname of the remote X server:
Xnest ­:1 ­­query s390vm.example.com
21.3.2. Problems When You Try to Log In
If you did not create a user account in the
Setup Agent
, log in as root and use the password you
assigned to root.
If you cannot remember your root password, boot your system as
linux single
.
Once you have booted into single user mode and have access to the
#
prompt, you must type
passwd
root
, which allows you to enter a new password for root. At this point you can type
shutdown -r
now
to reboot the system with the new root password.
If you cannot remember your user account password, you must become root. To become root, type
su
-
and enter your root password when prompted. Then, type
passwd <username>
. This allows you to
enter a new password for the specified user account.