IBM 71455DU manual Configuring Linux, Configuring Red Hat Enterprise Linux ES

j. Make sure that Yes, exit the Setup Utility is selected; then, press Enter.

Configuring Linux

For SOL operation on the server, you must configure the Linux operating system to expose the Linux initialization (booting) process. This enables users to log in to the Linux console through an SOL session and directs Linux output to the serial console. See the documentation for your specific Linux operating-system type for information and instructions.

Use one of the following procedures to enable SOL sessions for your Linux operating system. You must be logged in as a root user to perform these procedures.

Configuring Red Hat Enterprise Linux ES 2.1:

Note: This procedure is based on a default installation of Red Hat Enterprise Linux ES 2.1. The file names, structures, and commands might be different for other versions of Red Hat Linux.

To configure the general Linux parameters for SOL operation when using the Red Hat Enterprise Linux ES 2.1 operating system, complete the following steps.

Note: Hardware flow control prevents character loss during communication over a serial connection. You must enable it when using a Linux operating system.

1.Add the following line to the end of the # Run gettys in standard runlevels section of the /etc/inittab file. This enables hardware flow control and enables users to log in through the SOL console.

7:2345:respawn:/sbin/agetty -h ttyS1 19200 vt102

2.Add the following line at the bottom of the /etc/securetty file to enable a user to log in as the root user through the SOL console:

ttyS1

LILO configuration: If you are using LILO, complete the following steps:

1.Modify the /etc/lilo.conf file:

a.Add the following text to the end of the first default=linux line:

-Monitor

b.Comment out the map=/boot/map line by adding a # at the beginning of the line.

c.Comment out the message=/boot/message line by adding a # at the beginning of the line.

d.Add the following line before the first image= line:

#This will allow you to only Monitor the OS boot via SOL

e.Add the following text to the end of the first label=linux line:

-Monitor

f.Add the following line to the first image= section. This enables SOL. append="console=ttyS1,19200n8 console=tty1"

g.Add the following lines between the two image= sections:

#This will allow you to Interact with the OS boot via SOL image=/boot/vmlinuz-2.4.9-e.12smp

label=linux-Interact initrd=/boot/initrd-2.4.9-e.12smp.img read-only

Chapter 3. Configuring the server 69