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	<title>Blog O' Matty &#187; Linux Utilities</title>
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	<link>http://prefetch.net/blog</link>
	<description>Blog O' Matty</description>
	<lastBuildDate>Wed, 16 May 2012 00:16:36 +0000</lastBuildDate>
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		<item>
		<title>Using the automated bug-reporting tool (abrt) to generate core dumps when a Linux process fails</title>
		<link>http://prefetch.net/blog/index.php/2012/01/19/using-the-automated-bug-reporting-tool-abrt-to-generate-core-dumps-when-a-linux-process-fails/</link>
		<comments>http://prefetch.net/blog/index.php/2012/01/19/using-the-automated-bug-reporting-tool-abrt-to-generate-core-dumps-when-a-linux-process-fails/#comments</comments>
		<pubDate>Thu, 19 Jan 2012 16:20:15 +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=5274</guid>
		<description><![CDATA[Software fails, and it often occurs at the wrong time. When failures occur I want to understand why, and will usually start putting together the events that lead up to the issue. Some application issues can be root caused by reviewing logs, but catastrophic crashes will often require the admin to sit down with gdb [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/01/19/using-the-automated-bug-reporting-tool-abrt-to-generate-core-dumps-when-a-linux-process-fails/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Using exec-shield to protect your Linux servers from stack, heap and integer overflows</title>
		<link>http://prefetch.net/blog/index.php/2012/01/14/using-exec-shield-to-protect-your-linux-servers-from-stack-heap-and-integer-overflows/</link>
		<comments>http://prefetch.net/blog/index.php/2012/01/14/using-exec-shield-to-protect-your-linux-servers-from-stack-heap-and-integer-overflows/#comments</comments>
		<pubDate>Sat, 14 Jan 2012 15:08:12 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Security]]></category>
		<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5213</guid>
		<description><![CDATA[I&#8217;ve been a long time follower of the OpenBSD project, and their amazing work on detecting and protecting the kernel and applications from stack and heap overflows. Several of the concepts that were developed by the OpenBSD team were made available in Linux, and came by way of the exec-shield project. Of the many useful [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/01/14/using-exec-shield-to-protect-your-linux-servers-from-stack-heap-and-integer-overflows/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
		</item>
		<item>
		<title>Fcron, a feature rich cron and anacron replacement</title>
		<link>http://prefetch.net/blog/index.php/2012/01/14/fcron-a-feature-rich-cron-and-anacron-replacement/</link>
		<comments>http://prefetch.net/blog/index.php/2012/01/14/fcron-a-feature-rich-cron-and-anacron-replacement/#comments</comments>
		<pubDate>Sat, 14 Jan 2012 14:34:47 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5210</guid>
		<description><![CDATA[I&#8217;ve been looking at some opensource scheduling packages, and while doing my research I came across the fcron package. Fcron is a replacement for vixie cron and anacron, and provides a number of super useful features: - Run jobs based on the system load average. - Serialize jobs. - Set the nice value of the [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/01/14/fcron-a-feature-rich-cron-and-anacron-replacement/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Configuring wget to use a proxy server</title>
		<link>http://prefetch.net/blog/index.php/2011/11/09/configuring-wget-to-use-a-proxy-server/</link>
		<comments>http://prefetch.net/blog/index.php/2011/11/09/configuring-wget-to-use-a-proxy-server/#comments</comments>
		<pubDate>Wed, 09 Nov 2011 12:22:48 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=4821</guid>
		<description><![CDATA[Periodically I need to download files on servers that aren&#8217;t directly connected to the Internet. If the server has wget installed I will usually execute it passing it the URL of the resource I want to retrieve: $ wget prefetch.net/iso.dvd If the system resides behind a proxy server the http_proxy variable needs to be set [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/11/09/configuring-wget-to-use-a-proxy-server/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Four super cool utilities that are part of the psmisc package</title>
		<link>http://prefetch.net/blog/index.php/2011/11/07/four-super-cool-utilities-that-are-part-of-the-psmisc-package/</link>
		<comments>http://prefetch.net/blog/index.php/2011/11/07/four-super-cool-utilities-that-are-part-of-the-psmisc-package/#comments</comments>
		<pubDate>Mon, 07 Nov 2011 17:14:10 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=4815</guid>
		<description><![CDATA[There are a ton of packages available for the various Linux distributions. Some of these packages aren&#8217;t as well know as others, though they contain some crazy awesome utilities. One package that fits into this cataegory is psmisc. Psmisc contains several tools that be used to print process statistics, look at file descriptor activity, see [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/11/07/four-super-cool-utilities-that-are-part-of-the-psmisc-package/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Figuring out how long a Linux process has been alive</title>
		<link>http://prefetch.net/blog/index.php/2011/11/06/figuring-out-how-long-a-linux-process-has-been-alive/</link>
		<comments>http://prefetch.net/blog/index.php/2011/11/06/figuring-out-how-long-a-linux-process-has-been-alive/#comments</comments>
		<pubDate>Sun, 06 Nov 2011 12:10:04 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=4810</guid>
		<description><![CDATA[I&#8217;ve bumped into a few problems in the past where processes that were supposed to be short lived encountered an issue and never died. Over time these processes would build up and if it wasn&#8217;t for a cleanup task I developed the process table would have eventually filled up (the bug that caused this was [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/11/06/figuring-out-how-long-a-linux-process-has-been-alive/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Dealing with xauth &#8220;error in locking authority file&#8221; errors</title>
		<link>http://prefetch.net/blog/index.php/2011/11/01/dealing-with-xauth-error-in-locking-authority-file-errors/</link>
		<comments>http://prefetch.net/blog/index.php/2011/11/01/dealing-with-xauth-error-in-locking-authority-file-errors/#comments</comments>
		<pubDate>Tue, 01 Nov 2011 21:29:56 +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=4719</guid>
		<description><![CDATA[I recently logged into one of my servers and received the following error: $ ssh foo matty@foo&#8217;s password: Last login: Tue Nov 1 13:42:52 2011 from 10.10.56.100 /usr/bin/xauth: error in locking authority file /home/matty/.Xauthority I haven&#8217;t seen this one before, but based on previous &#8220;locking issues&#8221; I&#8217;ve encountered in the past I ran strace against [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/11/01/dealing-with-xauth-error-in-locking-authority-file-errors/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Displaying CPU temperatures on Linux hosts</title>
		<link>http://prefetch.net/blog/index.php/2011/10/29/displaying-cpu-temperatures-on-linux-hosts/</link>
		<comments>http://prefetch.net/blog/index.php/2011/10/29/displaying-cpu-temperatures-on-linux-hosts/#comments</comments>
		<pubDate>Sat, 29 Oct 2011 11:35:25 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Hardware]]></category>
		<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=1718</guid>
		<description><![CDATA[Intel and AMD keep coming out with bigger and faster CPUs. Each time I upgrade (I&#8217;m currently eyeing one of these) to a newer CPU it seems like the heat sinks and cooling fans have tripled in size (I ran across this first hand when I purchased a Zalman CPU cooler last year). If you [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/10/29/displaying-cpu-temperatures-on-linux-hosts/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Using collectl on Linux to view system performance</title>
		<link>http://prefetch.net/blog/index.php/2011/10/05/using-collectl-on-linux-to-view-system-performance/</link>
		<comments>http://prefetch.net/blog/index.php/2011/10/05/using-collectl-on-linux-to-view-system-performance/#comments</comments>
		<pubDate>Wed, 05 Oct 2011 15:54:29 +0000</pubDate>
		<dc:creator>mike</dc:creator>
				<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=4629</guid>
		<description><![CDATA[I recently needed to figure out what process was generating a bunch of I/O requests on a Linux system. On Solaris, there are a ton of tools available in the DTraceToolkit that can pin down i/o performance consumers. I really miss DTrace coming into Linux. I know there&#8217;s Systemtap, but I personally haven&#8217;t had much [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/10/05/using-collectl-on-linux-to-view-system-performance/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
		</item>
		<item>
		<title>Useful crontab short cuts</title>
		<link>http://prefetch.net/blog/index.php/2011/09/30/useful-crontab-short-cuts/</link>
		<comments>http://prefetch.net/blog/index.php/2011/09/30/useful-crontab-short-cuts/#comments</comments>
		<pubDate>Fri, 30 Sep 2011 14:36:01 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=4600</guid>
		<description><![CDATA[While reading through crontab(5) this morning I came across this useful nugget of information: &#8220;These special time specification &#8220;nicknames&#8221; are supported, which replace the 5 initial time and date fields, and are prefixed by the @ character: @reboot : Run once, at startup. @yearly : Run once a year, ie. &#8220;0 0 1 1 *&#8221;. [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/09/30/useful-crontab-short-cuts/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
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