Exalytics: How To Turn Boot Logging On and Off

Asset ID:	1-71-1568050.1
Update Date:	2013-07-10
Keywords:

Solution Type Technical Instruction Sure

Solution 1568050.1 : Exalytics: How To Turn Boot Logging On and Off

Applies to:

Exalytics In-Memory Machine X2-4 - Version All Versions and later
Information in this document applies to any platform.

Goal

How to turn off, or on, boot up messages in the console?

Solution

Boot up messages will be displayed in the console when the 'quiet console' parameter is set to 'tty0' in the /boot/grub/grub.conf file.

To turn off messaging, change value of the parameter from 'tty0' to 'ttyS0'.

The following example shows the correct configuration (quiet console=ttyS0) to turn OFF messaging:

default=0
timeout=5
serial --unit=0 --speed=9600
terminal --timeout=5 serial console
title Enterprise Linux (2.6.32-100.23.1.el5)
root (hd0,0)
#kernel /vmlinuz-2.6.32-100.23.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet console=ttyS0,9600n8 nmi_watchdog=0
# Modified to set size for ramdisk
#kernel /vmlinuz-2.6.32-100.23.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet console=ttyS0,9600n8 nmi_watchdog=0 ramdisk_size=600000000
kernel /vmlinuz-2.6.32-100.23.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet console=ttyS0 ramdisk_size=600000000 *****change ttyS0 to tty0*******
initrd /initrd-2.6.32-100.23.1.el5.img

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