Oracle Direct I/O on Linux

Two documents about Direct I/O and Asynchronous I/O on Linux:
Tuning Oracle Database 10g for ext3 file systems
Tuning and Optimizing Red Hat Enterprise Linux for Oracle 9i and 10g Databases


October 7, 2009 at 12:38 pm Leave a comment

More on network card bonding

Two useful articles from RedHat KnowledgeBase:

How do I configure Multiple Bonds in Red Hat Enterprise Linux 5 with different bonding modes?

What network bonding modes are available in Red Hat Enterprise Linux 5?

May 11, 2009 at 1:30 pm Leave a comment

Checking time zone information on RHEL5

[user@server ~]$ /usr/sbin/zdump -v /usr/share/zoneinfo/Asia/Karachi |grep 2009
/usr/share/zoneinfo/Asia/Karachi Tue Apr 14 18:59:59 2009 UTC = Tue Apr 14 23:59:59 2009 PKT isdst=0 gmtoff=18000
/usr/share/zoneinfo/Asia/Karachi Tue Apr 14 19:00:00 2009 UTC = Wed Apr 15 01:00:00 2009 PKST isdst=1 gmtoff=21600
/usr/share/zoneinfo/Asia/Karachi Sat Oct 31 17:59:59 2009 UTC = Sat Oct 31 23:59:59 2009 PKST isdst=1 gmtoff=21600
/usr/share/zoneinfo/Asia/Karachi Sat Oct 31 18:00:00 2009 UTC = Sat Oct 31 23:00:00 2009 PKT isdst=0 gmtoff=18000

April 30, 2009 at 11:00 am Leave a comment

RHEL5 – remote graphical Linux

To allow remote graphical linux desktop access the following changes are required in /etc/gdm/custom.conf .

Add two enties to the existing categories:



March 30, 2009 at 11:08 am Leave a comment

Font that saves ink

“After Dutch holey cheese, there now is a Dutch font with holes as well.”
Author’s claim their perforated font can save up to 20% ink:

February 6, 2009 at 12:45 pm Leave a comment

Red hat Enterprise Linux security patches

Since RHEL5.2 Red Hat introduced a feature which allows to apply all outstanding security patches with single command executed from the command line.

yum update -–security

December 5, 2008 at 2:51 pm Leave a comment

VI Cheat Sheet

Handy link to vi cheat sheet:

And Search and replace str1 with str2 in the whole file:


December 5, 2008 at 2:41 pm Leave a comment

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