Category Archives: Linux

Does Google Hurt Efficiency?

Posted on August 2, 2011 by Judson Bishop

The other night we were doing a hardware upgrade on a cluster and testing. We were working with the command clusvcadm to relocate a service from one host in the cluster to another but the originating server kept getting power … Continue reading →

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Mac OSX TFTP Server

Posted on July 6, 2011 by Judson Bishop

At the Circus we have a network management server that runs all of the normal services needed to manage a small network and so I rarely need to fire up the tftp server on my laptop. Today was one of … Continue reading →

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DRBD and Heartbeat

Posted on June 1, 2011 by Judson Bishop

2011-06-01 10:31:23 DRBD and Heartbeat I spent a considerable amount of time over the last couple of days working with DRBD and Heartbeat. Below are the links I used to get things running: http://wiki.centos.org/HowTos/Ha-Drbd http://www.howtoforge.com/vm_replication_failover_vmware_debian_etch_p3 http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Clusters_from_Scratch/s-intro-pacemaker.html http://www.drbd.org/users-guide/s-heartbeat-r1.html http://www.drbd.org/users-guide/s-heartbeat-config.html http://www.drbd.org/users-guide/s-heartbeat-crm.html Part … Continue reading →

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Veritas/Symantec Baremetal Restore

Posted on April 12, 2011 by Judson Bishop

I spent a considerable amount of time over the last couple of months testing different restore processes. This is my documentation for restoring Veritas/Symantec backups to a Linux server. The general outline is this: 1. Create a LiveUSB drive to … Continue reading →

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Xenix

Posted on March 16, 2011 by Judson Bishop

Today on Slashdot someone had a question about getting data off of an old Xenix server. A few years ago I did a consulting job for a customer who had an old Xenix server with no ethernet card that needed … Continue reading →

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Data Loss Prevention

Posted on March 7, 2011 by Judson Bishop

Every once in a while I get to write a neat piece of code that I can share. This is one of those times. I realize it is not large and by PerlMonk standards not very elegant. The problem therein … Continue reading →

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Password Aging

Posted on January 28, 2011 by Judson Bishop

At the Circus we have a password policy to change all passwords every 90 days. Today it was brought to my attention that one of the linux servers was not following that policy. I confirmed that was true and after … Continue reading →

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Two Variables, One Line

Posted on December 15, 2010 by Judson Bishop

This morning I could not for the life of me remember how to read two variables from one line in bash. As a result I am putting this simple script up here so that I have an easy place to … Continue reading →

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Red Hat Upgrades

Posted on December 3, 2010 by Judson Bishop

Now that RHEL 6 is out I’ve begun playing with upgrading our older RHEL servers, starting with anything that is RHEL 4 and then moving forward to RHEL5. The simplest one to start with was one of our network management … Continue reading →

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Add SCSI Drives to Linux

Posted on October 19, 2010 by Judson Bishop

First we should have an overview of the hardware on this server. There are two Perc controllers, a Perc5i and a Perc6i. The Perc5 has an MD1000 drive enclosure attached and the Perc6 has the internal drives attached. Perc6/i: OS … Continue reading →

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