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	<title>Backdrift &#187; unix</title>
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	<link>http://backdrift.org</link>
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		<title>How To Create OOM Killer Exceptions in Linux</title>
		<link>http://backdrift.org/how-to-create-oom-killer-exceptions</link>
		<comments>http://backdrift.org/how-to-create-oom-killer-exceptions#comments</comments>
		<pubDate>Wed, 19 Oct 2011 18:59:21 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[bash]]></category>
		<category><![CDATA[cron]]></category>
		<category><![CDATA[Debian]]></category>
		<category><![CDATA[killer]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[memory]]></category>
		<category><![CDATA[oom]]></category>
		<category><![CDATA[out of memory]]></category>
		<category><![CDATA[redhat]]></category>
		<category><![CDATA[scripting]]></category>
		<category><![CDATA[shell]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[troubleshooting]]></category>
		<category><![CDATA[ubuntu]]></category>
		<category><![CDATA[unix]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=1426</guid>
		<description><![CDATA[When a linux machine runs extremely low on memory the kernel begins deciding which processes it thinks are least important and starts killing them off in order to keep the processes it thinks are more important running. Unfortunately, the kernel OOM (out of memory) killer rarely makes the right decision, and your system is usually [...]]]></description>
		<wfw:commentRss>http://backdrift.org/how-to-create-oom-killer-exceptions/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Time Management For Recovering Sysadmins</title>
		<link>http://backdrift.org/time-management-for-recovering-sysadmins</link>
		<comments>http://backdrift.org/time-management-for-recovering-sysadmins#comments</comments>
		<pubDate>Wed, 22 Jun 2011 03:58:47 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[advice]]></category>
		<category><![CDATA[concentration]]></category>
		<category><![CDATA[interrupts]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[management]]></category>
		<category><![CDATA[puppet]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[time]]></category>
		<category><![CDATA[tips]]></category>
		<category><![CDATA[unix]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=1169</guid>
		<description><![CDATA[Everybody has heard the usual time management lecture; plan your day in advance, work from a list, don&#8217;t multitask. All fine and good, but this advice doesn&#8217;t really address the constant interruptions that sysadmins deal with. Let&#8217;s be honest, it&#8217;s really hard to focus on getting shit done while you&#8217;re constantly being pinged for help [...]]]></description>
		<wfw:commentRss>http://backdrift.org/time-management-for-recovering-sysadmins/feed</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Freeing Disk Space in Linux</title>
		<link>http://backdrift.org/freeing-disk-space-in-linux</link>
		<comments>http://backdrift.org/freeing-disk-space-in-linux#comments</comments>
		<pubDate>Tue, 14 Jun 2011 21:42:01 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[amazon]]></category>
		<category><![CDATA[cloud]]></category>
		<category><![CDATA[Debian]]></category>
		<category><![CDATA[disk]]></category>
		<category><![CDATA[ec2]]></category>
		<category><![CDATA[ext]]></category>
		<category><![CDATA[ext2]]></category>
		<category><![CDATA[ext3]]></category>
		<category><![CDATA[ext4]]></category>
		<category><![CDATA[filesystem]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[nas]]></category>
		<category><![CDATA[redhat]]></category>
		<category><![CDATA[RHEL]]></category>
		<category><![CDATA[san]]></category>
		<category><![CDATA[space]]></category>
		<category><![CDATA[storage]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[ubuntu]]></category>
		<category><![CDATA[unix]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=1150</guid>
		<description><![CDATA[Did you know that most filesystems reserve a percentage of the available free space as an emergency reserve for when the disk becomes full? This is a great safety mechanism if you&#8217;re running critical applications or database, but in many cases all this reserved space winds up going to waste. Especially so in the case [...]]]></description>
		<wfw:commentRss>http://backdrift.org/freeing-disk-space-in-linux/feed</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Mounting a File System on a Partition Inside of an LVM Volume</title>
		<link>http://backdrift.org/mounting-a-file-system-on-a-partition-inside-of-an-lvm-volume</link>
		<comments>http://backdrift.org/mounting-a-file-system-on-a-partition-inside-of-an-lvm-volume#comments</comments>
		<pubDate>Thu, 12 May 2011 23:17:34 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[fdisk]]></category>
		<category><![CDATA[filesystem]]></category>
		<category><![CDATA[kpartx]]></category>
		<category><![CDATA[kvm]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[lvm]]></category>
		<category><![CDATA[partition]]></category>
		<category><![CDATA[storage]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[unix]]></category>
		<category><![CDATA[Virtualization]]></category>
		<category><![CDATA[Xen]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=932</guid>
		<description><![CDATA[In my linux virtual environment I am using LVM volumes as the backing devices for virtual machines. Each of these LVM volumes contains a partition table splitting the LVM volume into at least one linux partition and one swap partition. In order to access these partitions from the dom0 host itself we can use the [...]]]></description>
		<wfw:commentRss>http://backdrift.org/mounting-a-file-system-on-a-partition-inside-of-an-lvm-volume/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Coping With Cloud Downtime</title>
		<link>http://backdrift.org/coping-with-cloud-downtime</link>
		<comments>http://backdrift.org/coping-with-cloud-downtime#comments</comments>
		<pubDate>Thu, 21 Apr 2011 21:12:53 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[apache]]></category>
		<category><![CDATA[aws]]></category>
		<category><![CDATA[cloud]]></category>
		<category><![CDATA[downtime]]></category>
		<category><![CDATA[ec2]]></category>
		<category><![CDATA[HA]]></category>
		<category><![CDATA[iaas]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[mylvmbackup]]></category>
		<category><![CDATA[mysql]]></category>
		<category><![CDATA[puppet]]></category>
		<category><![CDATA[rdiff-backup]]></category>
		<category><![CDATA[rsnapshot]]></category>
		<category><![CDATA[rsync]]></category>
		<category><![CDATA[s3]]></category>
		<category><![CDATA[unix]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=952</guid>
		<description><![CDATA[In light of the recent Amazon cloud service interruptions it seems like a good time to share some ideas about how to help keep cloud hosted services available during unexpected and potentially long lasting outages. Each of these items can be implemented using free and open source software either hosted in your own datacenter or [...]]]></description>
		<wfw:commentRss>http://backdrift.org/coping-with-cloud-downtime/feed</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Ubuntu Lucid 10.04 Cobbler Kickstart Setup How To</title>
		<link>http://backdrift.org/ubuntu-lucid-10-04-cobbler-kickstart-setup-how-to</link>
		<comments>http://backdrift.org/ubuntu-lucid-10-04-cobbler-kickstart-setup-how-to#comments</comments>
		<pubDate>Fri, 18 Feb 2011 00:28:42 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[10.04]]></category>
		<category><![CDATA[automation]]></category>
		<category><![CDATA[build]]></category>
		<category><![CDATA[cobbler]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[kickstart]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[lucid]]></category>
		<category><![CDATA[preseed]]></category>
		<category><![CDATA[pxe]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[ubunut]]></category>
		<category><![CDATA[unix]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=934</guid>
		<description><![CDATA[Importing the ISO At the time of this writing the version of cobbler available for CentOS-5 via the EPEL repo was 2.0.3.1. This version doesn&#8217;t seem to include proper support for &#8220;breeds&#8221; other than redhat, allthough it is alluded to in the documentation. So, in order to import the ubuntu media, I had to perform [...]]]></description>
		<wfw:commentRss>http://backdrift.org/ubuntu-lucid-10-04-cobbler-kickstart-setup-how-to/feed</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Xen Disk Hot Add (Block Device) Howto</title>
		<link>http://backdrift.org/xen-disk-hot-add-block-device-howto</link>
		<comments>http://backdrift.org/xen-disk-hot-add-block-device-howto#comments</comments>
		<pubDate>Wed, 19 Jan 2011 03:04:49 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[block]]></category>
		<category><![CDATA[block-attach]]></category>
		<category><![CDATA[block-detach]]></category>
		<category><![CDATA[disk]]></category>
		<category><![CDATA[hot-add]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[storage]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[unix]]></category>
		<category><![CDATA[Xen]]></category>
		<category><![CDATA[xm]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=907</guid>
		<description><![CDATA[Xen allows you to hot add (and remove) disks to a guest domU while the system is running. To do this you&#8217;ll use the &#8216;xm block-*&#8217; commands. Hot Add To hot add a disk we use the &#8216;xm block-attach&#8217; command. Usage: xm block-attach &#60;Domain&#62; &#60;BackDev&#62; &#60;FrontDev&#62; &#60;Mode&#62; &#91;BackDomain&#93; Let me describe what each of these [...]]]></description>
		<wfw:commentRss>http://backdrift.org/xen-disk-hot-add-block-device-howto/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Where to find the inittab in Ubuntu Linux</title>
		<link>http://backdrift.org/where-to-find-the-inittab-in-ubuntu-linux</link>
		<comments>http://backdrift.org/where-to-find-the-inittab-in-ubuntu-linux#comments</comments>
		<pubDate>Wed, 22 Dec 2010 02:18:49 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[event.d]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[init]]></category>
		<category><![CDATA[inittab]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[telinit]]></category>
		<category><![CDATA[ubuntu]]></category>
		<category><![CDATA[unix]]></category>
		<category><![CDATA[upstart]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=780</guid>
		<description><![CDATA[In most variants of GNU/Linux the init daemon and its configuration file /etc/inittab are used to define things like runlevels and consoles. In an effort to improve boot time, system performance and ease scripted configuration, ubuntu has implemented upstart, an event-based replacement for the traditional init daemon. This is good for the most part, but [...]]]></description>
		<wfw:commentRss>http://backdrift.org/where-to-find-the-inittab-in-ubuntu-linux/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Fixing Jumpy Finder File List Window in Mac OSX Snow Leopard</title>
		<link>http://backdrift.org/fixing-jumpy-finder-file-list-window-in-mac-osx-snow-leopard</link>
		<comments>http://backdrift.org/fixing-jumpy-finder-file-list-window-in-mac-osx-snow-leopard#comments</comments>
		<pubDate>Sun, 19 Dec 2010 17:26:35 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[finder]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[mac]]></category>
		<category><![CDATA[OSX]]></category>
		<category><![CDATA[snow leopard]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[unix]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=836</guid>
		<description><![CDATA[After upgrading to Snow Leopard I noticed that when using finder to browse certain directories, especially network file shares, the window would begin scrolling and jumping up and down erratically on its own. I was left scratching my head about this for a while until I finally realized that this only happened when connecting to [...]]]></description>
		<wfw:commentRss>http://backdrift.org/fixing-jumpy-finder-file-list-window-in-mac-osx-snow-leopard/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Ubuntu UEC/EC2 Puppet Client Howto</title>
		<link>http://backdrift.org/ubuntu-uecec2-puppet-client-howto</link>
		<comments>http://backdrift.org/ubuntu-uecec2-puppet-client-howto#comments</comments>
		<pubDate>Wed, 29 Sep 2010 03:12:51 +0000</pubDate>
		<dc:creator>Keith</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[amazon]]></category>
		<category><![CDATA[ec2]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[puppet]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[uec]]></category>
		<category><![CDATA[unix]]></category>
		<category><![CDATA[Virtualization]]></category>

		<guid isPermaLink="false">http://backdrift.org/?p=816</guid>
		<description><![CDATA[Configuring an amazon EC2 image to associate itself with your puppet master on boot was once an involved manual process requiring custom boot scripts and hand-rolling your own AMI. With the UEC (Ubuntu Enterprise Cloud) AMIs this is much more straightforward. As long as you use an AMI from this list you&#8217;ll be able to [...]]]></description>
		<wfw:commentRss>http://backdrift.org/ubuntu-uecec2-puppet-client-howto/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
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