Category Archives: SysAdmin

Installing git on CentOS

Posted on September 7, 2011 by James Reuben Knowles

git is available as an EPEL package. First, activate EPEL via $ sudo rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm NOTE:That exact URL will change with time. I took it from the EPEL FAQ. Next, install the git package. $ sudo yum install git

Posted in SysAdmin | Tagged , , , , | Leave a comment

Cleaning Up Jammed Subversion Transactions

Posted on August 26, 2011 by James Reuben Knowles

There was a very odd server failure while a big Subversion commit was in process. (The ISP hosting the server is kind of flaky.) To clean up the leftover files from the failed transaction, I did this: $ svnadmin lstxns … Continue reading →

Posted in SysAdmin, Uncategorized | Leave a comment

DHCP Lease Time Optimization

Posted on July 29, 2011 by James Reuben Knowles

Setting DHCP lease times is in practice pure voodoo. I ran across a paper presented in 2007 on research into DHCP lease times at Georgia Tech’s student network called Usage-Based DHCP Lease Time Optimization. While the paper on the whole … Continue reading →

Posted in SysAdmin | Leave a comment

Git Tutorial

Posted on July 5, 2011 by James Reuben Knowles

For the uninitiated, here’s a nice git tutorial at progit.org. You can download the current stable version of git at the git home page.

Posted in SysAdmin | Tagged , | Leave a comment

ZFS on Linux

Posted on June 24, 2011 by James Reuben Knowles

ZFS and Linux unfortunately collide. M. Tim Jones has a paper on IBM developerWorks called Run ZFS on Linux.  

Posted in SysAdmin | Tagged , | Leave a comment

How to Set Up Viscosity for Windows for OpenVPN

Posted on May 20, 2011 by James Reuben Knowles

Step-by-step instructions on how to install and configure Viscosity for windows. Continue reading →

Posted in SysAdmin | Tagged , , , , , | Leave a comment

Zimbra Tweaks

Posted on March 29, 2011 by James Reuben Knowles

This is a list of the various little tweaks I performed on Zimbra. Continue reading →

Posted in SysAdmin | Tagged , , , , , , , , , | Leave a comment

Making ExpanDrive Work On New Macs

Posted on March 18, 2011 by James Reuben Knowles

ExpanDrive and other products that rely on the MacFUSE toolkit do not work on MacBook Pros.
Continue reading →

Posted in SysAdmin | Tagged , , , , , , | Leave a comment

Adding a GoDaddy SSL Certificate to Zimbra 7

Posted on March 14, 2011 by James Reuben Knowles

These are the steps that I took to (finally) get Zimbra 7 to accept a GoDaddy-issued SSL certificate. Continue reading →

Posted in SysAdmin | Tagged , , , , , , , | 2 Comments

Automatic OS Updates in CentOS

Posted on March 13, 2011 by James Reuben Knowles

How to tweak the yum dæmon to do automatic and semi-automatic updates. Continue reading →

Posted in SysAdmin | Tagged , , , | 1 Comment