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Showing posts from 2012

Round-Robin DNS Setup

Round-Robin DNS Setup Round-robin DNS provides load distribution across multiple machines using the same hostname but each having their own IP.  Each request to the DNS server is routed to a different machine in sequential order.   Configuration of round-robin DNS uses the Berkeley Internet Name Domain(BIND) named daemon.  BIND uses zone files to define hostnames with address records.
An example of a round-robin BIND zone file:
 nfs.test.local IN A  nfs.test.local IN A  nfs.test.local IN A
Install and Setup This applies to RHEL.
Make sure the BIND package is installed.   Do not install the bind-chroot package:
yum install bind
The install creates the named service and the following configuration files:
/etc/named.conf                          #read when named service starts /var/named                                  #working directory for the named service /var/named/dynamic                   #directory for the zone data
Edit named.conf to look like the…

Reset or Clear Thinkpad BIOS Passwords - How To

Lenovo Thinkpads have three options for securing the system with passwords.  In the system BIOS are selections for setting a:
-Power-On password
-Hard-Disk password
-Supervisor password.

I'll explain these options and walk through how to initially set them up, remove the passwords, and finally, how to clear a BIOS password.

To start, when you first get a new Thinkpad it's a good idea to secure it against unauthorized use. The following steps explain how to setup passwords through the system BIOS.  After these passwords have been set, the system will prompt for them on boot.

To Set Power-On Password
1) Boot the machine and press F1 to enter the BIOS.
2) Select Security option
3) Select Password option
4) Select Power-On Password option
5) Enter your new password twice in the fields that say Enter New Password
6) Hit enter twice to save this password.

To Set Hard-Drive Password
1) Boot the machine and press F1 to enter the BIOS
2) Select Security option
3) Select Password option

Lenovo Recycling Programs

Lenovo Recycling Programs
What to do with older, outdated Lenovo equipment?

You want to be environmentally responsible and not just throw old rechargeable batteries in the trash bin.  Lenovo has the answers for you.  Below are two great programs allowing you to recycle Lenovo machines in an easy responsible way.
According to Lenovo:
 Lenovo offers environmentally sound managed asset recovery services (ARS) and product take back and recycling programs to business and consumer customers, respectively, in many countries around the world. These offerings are designed to satisfy specific customer and geographic needs while maximizing the reuse, recycling, and/or environmental disposal of replaced and end of life products, parts, and waste.

Battery Recyclingand Disposal:  Lenovo participates in the Call2Recycle program.  Rechargeable batteries from Lenovo products such as lithium ion batteries in …

RHEL6.1 Kickstart Configuration How To

I recently was tasked with creating a Redhat kickstart server so we could install lab machines automatically across the network instead of installing each one manually with a DVD.  The following are the steps I took to create an install server and the kickstart configuration file.  I'm using RHEL6.1 x86_64 and Intel based servers.Software Requirements This applies to RHEL6.1: TFTP-Server DHCP Server Xinetd NFS Syslinux System-config-kickstart (GUI tool to configure kickstart)
Install these packages and ensure each service (dhcp, tftp, nfs, xinetd) is running.
The ports used by these services must be enabled through the firewall, or the firewall must be disabled.
>chkconfig iptables off >service iptables stop Installation
Red Hat Kickstart Server Setup
1) Copy RHEL6.1 install media to a directory on your server- >Mount /mnt/cdrom >cp –var /mnt/cdrom/RedHat       /rhel6.1 >cp /mnt/cdrom/RELEASE-NOTES*.html    /rhel6.1
2) Create NFS share that points to your insta…