Chapter 5. Native Linux on pSeries 127
In case you have Linux running on your desktop instead of Windows, PuTTY is
not needed, as most Linux systems come with a working ssh client installed (see
http://www.openssh.org/ for the most common implementation.)
Virtual desktops with VNC
VNC stands for Virtual Network Computing. It is, in essence, a remote display
system that allows you to view a desktop environment not only on the machine
where it is running, but from anywhere on the Internet and from a wide variety of
machine architectures. For further information and to download the appropriate
client for your desktop system, see:
http://www.uk.research.att.com/vnc/
All newer VNC servers provide access via HTTP. A small Web server runs on
port 58
XX
, where
XX
is the display number of the virtual display. This means that
you are able to connect to your VNC session by pointing any Java-capable
browser to http://hostname:5801/. As the VNC server comes preinstalled on
SuSE Linux for pSeries, no download or installation on your client system is
necessary.
5.2.3 Systems without a graphics adapter
To simulate a system without a graphics adapter, such as the entry rack model
p610 6C1, we simply disconnect the display of our deskside p610 6E1 and
switch to a serial console using the procedure described in this section.
A serial cable has to be connected to a serial port of the pSeries and a terminal
attached. Using a null modem cable, a normal PC can run a terminal emulation
program, such as HyperTerminal (which is included in Windows) or minicom
under Linux. To use HyperTerminal, make sure that the correct COM port,
terminal type VT100, and 9600 Bits per second are selected.
Next switch the pSeries console by using the SMS Utilities menu. When
selecting Console in this menu, the terminal or terminal emulation has to be
physically connected already. Now the console has to be selected by pressing a
number, as indicated on the new console. After a successful switch to the new
serial console, the graphics display can be disconnected. An analogous
procedure can be used to switch back to the graphical console.
Installing SuSE Linux
To install Linux on a system with a serial console, only a few steps are different
from what was described in Systems with a graphics adapter on page 120.
128 Linux Applications on pSeries
Step 1
The first step is to insert the SuSE CD into the system and boot to SMS Multiboot
by pressing 1 during the initialization phase (similar to the procedure for systems
with a graphical console, but pressing 1 instead of F1). Select the CD drive as an
install device, as shown in Example 5-2, and confirm the Identstring SuSE
SLES-8 (PPC).
Example 5-2 SMS Multiboot - Select install device
pSeries Firmware
Version CLT02121
(c) Copyright IBM Corp. 2000, 2002 All rights reserved.
-------------------------------------------------------------------------------
Install Operating System From:
Device
Number Name
1 Diskette
2 SCSI CD/DVD id=@2,0 (Integrated/Internal)
3 SCSI Tape id=@1,0 (Integrated/Internal)
4 Token-Ring (slot=5/T1)
5 Port E1 - 100/10 Ethernet Adapter (Integrated/E1)
6 Port E2 - 100/10 Ethernet Adapter (Integrated/E2)
7 IBM Gigabit UTP PCI Adapter (slot=1/E1)
8 None
-------------------------------------------------------------------------------
Navigation keys:
M = return to Main Menu
ESC key = return to previous screen X = eXit System Management Services
-------------------------------------------------------------------------------
Type the number of the menu item and press Enter or Select a Navigation Key:
2
Step 2
As we are already in step two, the appropriate kernel now needs to be selected
on the yaboot menu, as shown in Example 5-3. In addition to the kernel selection
with install, we also specify the option vnc=1 to have a virtual graphical display.
Example 5-3 Kernel selection with yaboot
Welcome to SuSE Linux!
Use "install" to boot the ppc64 kernel
Use "install32" to boot the 32bit RS/6000 kernel
You can pass the option "noinitrd" to skip the installer.
Example: install noinitrd root=/dev/sda4
Welcome to yaboot version 1.3.6.SuSE

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