<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
	>

<channel>
	<title>Blog O' Matty</title>
	<atom:link href="http://prefetch.net/blog/index.php/feed/" rel="self" type="application/rss+xml" />
	<link>http://prefetch.net/blog</link>
	<description>Blog O' Matty</description>
	<lastBuildDate>Thu, 20 Dec 2012 13:35:38 +0000</lastBuildDate>
	<language>en-US</language>
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>1</sy:updateFrequency>
	
		<item>
		<title>Locating WWPNs on Linux servers</title>
		<link>http://prefetch.net/blog/index.php/2012/12/19/locating-wwpns-on-linux-servers/</link>
		<comments>http://prefetch.net/blog/index.php/2012/12/19/locating-wwpns-on-linux-servers/#comments</comments>
		<pubDate>Thu, 20 Dec 2012 00:42:40 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Storage]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5775</guid>
		<description><![CDATA[I do a lot of storage-related work, and often times need to grab WWPNs to zone hosts and to mask storage. To gather the WWPNs I would often times use the following script on my RHEL and CentOS servers: #!/bin/sh FC_PATH="/sys/class/fc_host" for fc_adapter in `ls ${FC_PATH}` do echo "${FC_PATH}/${fc_adapter}:" NAME=$(awk '{print $1}' ${FC_PATH}/${fc_adapter}/symbolic_name ) echo [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/12/19/locating-wwpns-on-linux-servers/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Configuring yum to keep more than three kernels</title>
		<link>http://prefetch.net/blog/index.php/2012/08/03/configuring-yum-to-keep-more-than-three-kernels/</link>
		<comments>http://prefetch.net/blog/index.php/2012/08/03/configuring-yum-to-keep-more-than-three-kernels/#comments</comments>
		<pubDate>Fri, 03 Aug 2012 11:50:18 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Package Management]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5766</guid>
		<description><![CDATA[When you run &#8216;yum update&#8217; on your Fedora system, the default yum configuration will keep the last 3 kernels. This allows you to fail back to a previous working kernel if you encounter an error or a bug. The number of kernels to keep is controlled by the installonly_limit option, which is thoroughly described in [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/08/03/configuring-yum-to-keep-more-than-three-kernels/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Purging the yum header and package cache</title>
		<link>http://prefetch.net/blog/index.php/2012/08/02/purging-the-yum-header-and-package-cache/</link>
		<comments>http://prefetch.net/blog/index.php/2012/08/02/purging-the-yum-header-and-package-cache/#comments</comments>
		<pubDate>Thu, 02 Aug 2012 12:01:15 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Package Management]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5763</guid>
		<description><![CDATA[Most of the Linux distributions that utilize the yum package manager cache headers and packages by default. These files are cached in the directory identified by the cachedir option, which defaults to /var/cache/yum on all of the hosts I checked. On my Fedora 16 desktop this directory has grown to 167MB in size: $ du [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/08/02/purging-the-yum-header-and-package-cache/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Sudo insults &#8212; what a fun feature!</title>
		<link>http://prefetch.net/blog/index.php/2012/08/01/sudo-insults-what-a-fun-feature/</link>
		<comments>http://prefetch.net/blog/index.php/2012/08/01/sudo-insults-what-a-fun-feature/#comments</comments>
		<pubDate>Wed, 01 Aug 2012 23:12:25 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5753</guid>
		<description><![CDATA[I think humor plays a big role in life, especially the life of a SysAdmin. This weekend I was cleaning up some sudoers files and came across a reference to the &#8220;insult&#8221; option in the documentation. Here is what the manual says: &#8220;insults If set, sudo will insult users when they enter an incorrect password. [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/08/01/sudo-insults-what-a-fun-feature/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Summarizing system call activity on Solaris hosts</title>
		<link>http://prefetch.net/blog/index.php/2012/07/21/summarizing-system-call-activity-on-solaris-hosts/</link>
		<comments>http://prefetch.net/blog/index.php/2012/07/21/summarizing-system-call-activity-on-solaris-hosts/#comments</comments>
		<pubDate>Sat, 21 Jul 2012 13:35:28 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Solaris Debugging]]></category>
		<category><![CDATA[Solaris Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5746</guid>
		<description><![CDATA[I previously described how to use strace to to summarize system call activity on Linux hosts. Solaris provides similar data with the truss &#8220;-c&#8221; option: $ truss -c -p 26396 syscall seconds calls errors read .000 3 write 7.671 25038 time .000 21 stat .000 15 lseek .460 24944 getpid .000 15 kill .162 7664 [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/07/21/summarizing-system-call-activity-on-solaris-hosts/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Summarizing system call activity on Linux systems</title>
		<link>http://prefetch.net/blog/index.php/2012/07/20/summarizing-system-call-activity-on-linux-systems/</link>
		<comments>http://prefetch.net/blog/index.php/2012/07/20/summarizing-system-call-activity-on-linux-systems/#comments</comments>
		<pubDate>Fri, 20 Jul 2012 22:19:56 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Debugging]]></category>
		<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5740</guid>
		<description><![CDATA[Linux has a guadzillion debugging utilities available. One of my favorite tools for debugging problems is strace, which allows you to observe the system calls a process is making in realtime. Strace also has a &#8220;-c&#8221; option to summarize system call activity: $ strace -c -p 28009 Process 28009 attached Process 28009 detached % time [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/07/20/summarizing-system-call-activity-on-linux-systems/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Installing OpenSSH on an AIX 7.1 server</title>
		<link>http://prefetch.net/blog/index.php/2012/07/15/installing-openssh-on-an-aix-7-1-server/</link>
		<comments>http://prefetch.net/blog/index.php/2012/07/15/installing-openssh-on-an-aix-7-1-server/#comments</comments>
		<pubDate>Sun, 15 Jul 2012 13:42:30 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[AIX Package Management]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5732</guid>
		<description><![CDATA[I&#8217;m pretty new to AIX, and I&#8217;m learning all about its idiosyncrasies. One thing I still don&#8217;t understang is why SSH isn&#8217;t installed by default. The packages are located on the AIX 7 Volume 1 of 2 DVD, but for some reason the installer doesn&#8217;t feel the need to make sshd available to the system [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/07/15/installing-openssh-on-an-aix-7-1-server/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
		</item>
		<item>
		<title>Scalable storage for QEMU/KVM</title>
		<link>http://prefetch.net/blog/index.php/2012/07/12/scalable-storage-for-qemukvm/</link>
		<comments>http://prefetch.net/blog/index.php/2012/07/12/scalable-storage-for-qemukvm/#comments</comments>
		<pubDate>Thu, 12 Jul 2012 17:33:32 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux KVM]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5642</guid>
		<description><![CDATA[While reading up on various scalable file systems I came across the sheepdog project. For those new to sheepdog, their website describes it as: &#8220;Sheepdog is a distributed storage system for QEMU/KVM. It provides highly available block level storage volumes that can be attached to QEMU/KVM virtual machines. Sheepdog scales to several hundreds nodes, and [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/07/12/scalable-storage-for-qemukvm/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Visualizing syslog data with LogAnalyzer and rsyslog-mysql</title>
		<link>http://prefetch.net/blog/index.php/2012/07/12/visualizing-syslog-data-with-loganalyzer-and-rsyslog-mysql/</link>
		<comments>http://prefetch.net/blog/index.php/2012/07/12/visualizing-syslog-data-with-loganalyzer-and-rsyslog-mysql/#comments</comments>
		<pubDate>Thu, 12 Jul 2012 17:26:08 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Syslog]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5557</guid>
		<description><![CDATA[I recently discussed setting up rsyslog to write syslog data to a MySQL database. Once you get this set up, you can start writing SQL statements to view the data in various ways. The next logical step is visualizing your data, and that&#8217;s where LogAnalyzer comes in. LogAnalyzer is a PHP application that can be [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/07/12/visualizing-syslog-data-with-loganalyzer-and-rsyslog-mysql/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Configuring a user to use the bash shell on an AIX server</title>
		<link>http://prefetch.net/blog/index.php/2012/07/11/configuring-a-user-to-use-the-bash-shell-on-an-aix-server/</link>
		<comments>http://prefetch.net/blog/index.php/2012/07/11/configuring-a-user-to-use-the-bash-shell-on-an-aix-server/#comments</comments>
		<pubDate>Wed, 11 Jul 2012 11:36:11 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[AIX Debugging]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5720</guid>
		<description><![CDATA[I previously wrote about my experience installing bash on my AIX hosts. After I installed the package I wanted to make bash my default shell. I fired up usermod but was greeted with the following error: $ usermod -s /usr/bin/bash matty 3004-703 Check &#8220;/etc/security/login.cfg&#8221; file. 3004-692 Error changing &#8220;shell&#8221; to &#8220;/usr/bin/bash&#8221; : Value is invalid. [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/07/11/configuring-a-user-to-use-the-bash-shell-on-an-aix-server/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
	</channel>
</rss>
