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	<title>Patterns &#187; ops</title>
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	<link>http://kb.huptas.net</link>
	<description>Technical patchwork to ease my brain</description>
	<lastBuildDate>Sat, 08 Aug 2009 23:10:21 +0000</lastBuildDate>
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		<item>
		<title>OpenSSL: Retrieve remote SSL certificate</title>
		<link>http://kb.huptas.net/2008/06/11/openssl-retrieve-remote-ssl-certificate/</link>
		<comments>http://kb.huptas.net/2008/06/11/openssl-retrieve-remote-ssl-certificate/#comments</comments>
		<pubDate>Wed, 11 Jun 2008 13:12:58 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[security]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/?p=168</guid>
		<description><![CDATA[The following small script has been copied over from madboa.com: #!/bin/sh # # usage: retrieve-cert.sh remote.host.name [port] # REMHOST=$1 REMPORT=${2:-443} echo &#124;\ openssl s_client -connect ${REMHOST}:${REMPORT} 2&#62;&#38;1 &#124;\ sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p']]></description>
		<wfw:commentRss>http://kb.huptas.net/2008/06/11/openssl-retrieve-remote-ssl-certificate/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Virtualization: Virtualbox rules them all (was: KVM+Qemu=Dump VMware Server)</title>
		<link>http://kb.huptas.net/2008/04/28/virtualization-virtualbox-rules-them-all-was-kvmqemudump-vmware-server/</link>
		<comments>http://kb.huptas.net/2008/04/28/virtualization-virtualbox-rules-them-all-was-kvmqemudump-vmware-server/#comments</comments>
		<pubDate>Mon, 28 Apr 2008 12:11:50 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[virtual]]></category>
		<category><![CDATA[kvm]]></category>
		<category><![CDATA[qemu]]></category>
		<category><![CDATA[virtualbox]]></category>
		<category><![CDATA[virtualization]]></category>
		<category><![CDATA[vmware]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/?p=149</guid>
		<description><![CDATA[Initially I wanted to write about my positive experience with kvm+qemu but after several weeks of testing the following downsides became apparent: currently no support for AltGr no copy-and-paste support to/from host As those issues actually prevented me from productively using guest images with kvm a colleague had the right hint at hand: Virtualbox. I [...]]]></description>
		<wfw:commentRss>http://kb.huptas.net/2008/04/28/virtualization-virtualbox-rules-them-all-was-kvmqemudump-vmware-server/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Debian: Issues with poller.php in latest Cacti (0.8.7a)</title>
		<link>http://kb.huptas.net/2007/12/12/debian-issues-with-pollerphp-in-latest-cacti-087a/</link>
		<comments>http://kb.huptas.net/2007/12/12/debian-issues-with-pollerphp-in-latest-cacti-087a/#comments</comments>
		<pubDate>Wed, 12 Dec 2007 12:42:11 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[monitoring]]></category>
		<category><![CDATA[b0rken]]></category>
		<category><![CDATA[Cacti]]></category>
		<category><![CDATA[Debian]]></category>
		<category><![CDATA[unstable]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/2007/12/12/debian-issues-with-pollerphp-in-latest-cacti-087a/</guid>
		<description><![CDATA[Prehistory: Upgraded cacti to 0.8.7a a couple of weeks ago during a regular &#8220;apt-get dist-upgrade&#8221; run. Today I checked my Cacti installation to gather some intel on a performance/latency issue that we are currently encountering on a network link. As all graphs are blank since mid of October (hey, I am only checking in to [...]]]></description>
		<wfw:commentRss>http://kb.huptas.net/2007/12/12/debian-issues-with-pollerphp-in-latest-cacti-087a/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>SNMPD: Remotely query return code of scripts</title>
		<link>http://kb.huptas.net/2007/11/20/snmpd-remotely-query-return-code-of-scripts/</link>
		<comments>http://kb.huptas.net/2007/11/20/snmpd-remotely-query-return-code-of-scripts/#comments</comments>
		<pubDate>Tue, 20 Nov 2007 08:54:06 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[monitoring]]></category>
		<category><![CDATA[systems]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/2007/11/20/snmpd-remotely-query-return-code-of-scripts/</guid>
		<description><![CDATA[To remotely check the return code of a script via snmpd add the following to snmpd.conf: exec myname /path/to/script After recycling the snmpd daemon the return code could be obtained via the following OID: 1.3.6.1.4.1.2021.8.1.100.1 If you have more than one exec line the last digit is incremented by one for each script.]]></description>
		<wfw:commentRss>http://kb.huptas.net/2007/11/20/snmpd-remotely-query-return-code-of-scripts/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>CPU Hardware Virtualization support</title>
		<link>http://kb.huptas.net/2007/11/08/cpu-hardware-virtualization-support/</link>
		<comments>http://kb.huptas.net/2007/11/08/cpu-hardware-virtualization-support/#comments</comments>
		<pubDate>Thu, 08 Nov 2007 08:55:45 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[systems]]></category>
		<category><![CDATA[virtual]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/2007/11/08/cpu-hardware-virtualization-support/</guid>
		<description><![CDATA[Run the following command to find out if your cpu supports hardware virtualization: egrep '^flags.*(vmx&#124;svm)' /proc/cpuinfo AMD processors would have the svm flag set and Intel processor the vmx flag. Please note that hardware virtualization also needs to be enabled in the bios before being usable.]]></description>
		<wfw:commentRss>http://kb.huptas.net/2007/11/08/cpu-hardware-virtualization-support/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Debian: paste with mouse in vi</title>
		<link>http://kb.huptas.net/2007/10/10/debian-paste-with-mouse-in-vi/</link>
		<comments>http://kb.huptas.net/2007/10/10/debian-paste-with-mouse-in-vi/#comments</comments>
		<pubDate>Wed, 10 Oct 2007 18:52:55 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[systems]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/2007/10/10/debian-paste-with-mouse-in-vi/</guid>
		<description><![CDATA[Ever wondered why vi(m) automatically inserts tabs on each line you paste using your mouse with middle-click (and with each line more an additional tab gets added)? This has been annoying me for years, so I finally went and started searching for a solution. In the end it&#8217;s oh-so simple. When you are in vi, [...]]]></description>
		<wfw:commentRss>http://kb.huptas.net/2007/10/10/debian-paste-with-mouse-in-vi/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>vi: replace newline</title>
		<link>http://kb.huptas.net/2007/09/26/vi-replace-newline/</link>
		<comments>http://kb.huptas.net/2007/09/26/vi-replace-newline/#comments</comments>
		<pubDate>Wed, 26 Sep 2007 19:32:20 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[systems]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/2007/09/26/vi-replace-newline/</guid>
		<description><![CDATA[In order to replace a newline character in vi, say by the string &#8220;, &#8221; the following command should do while being in vi: :%s/\n/\,\ /g]]></description>
		<wfw:commentRss>http://kb.huptas.net/2007/09/26/vi-replace-newline/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>OpenVPN, SSH and DSL lines</title>
		<link>http://kb.huptas.net/2007/09/20/openvpn-ssh-and-dsl-lines/</link>
		<comments>http://kb.huptas.net/2007/09/20/openvpn-ssh-and-dsl-lines/#comments</comments>
		<pubDate>Thu, 20 Sep 2007 20:46:38 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[networking]]></category>
		<category><![CDATA[security]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/2007/09/20/openvpn-ssh-and-dsl-lines/</guid>
		<description><![CDATA[Setting A few virtual servers were set up for one of our customers and to improve security we only publicly allowed HTTP/HTTPS and OpenVPN. So the customer would have to vpn in before a SSH session could be established. So far so good&#8230; Customer is able to happily vpn in from multiple clients and open [...]]]></description>
		<wfw:commentRss>http://kb.huptas.net/2007/09/20/openvpn-ssh-and-dsl-lines/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Debian: set static route</title>
		<link>http://kb.huptas.net/2007/09/13/debian-set-static-route/</link>
		<comments>http://kb.huptas.net/2007/09/13/debian-set-static-route/#comments</comments>
		<pubDate>Thu, 13 Sep 2007 12:46:08 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[systems]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/2007/09/13/debian-set-static-route/</guid>
		<description><![CDATA[Static routes would be configured in /etc/network/interfaces in the section for the respective network adapter: iface eth1 inet static address 192.168.14.80 netmask 255.255.255.0 network 192.168.14.0 broadcast 192.168.14.255 up route add -net 10.10.1.0 netmask 255.255.255.0 gw 192.168.14.82 down route del -net 10.10.1.0 netmask 255.255.255.0 gw 192.168.14.82]]></description>
		<wfw:commentRss>http://kb.huptas.net/2007/09/13/debian-set-static-route/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>NFS: mount options</title>
		<link>http://kb.huptas.net/2007/09/11/nfs-mount-options/</link>
		<comments>http://kb.huptas.net/2007/09/11/nfs-mount-options/#comments</comments>
		<pubDate>Tue, 11 Sep 2007 19:47:43 +0000</pubDate>
		<dc:creator>Dustin</dc:creator>
				<category><![CDATA[systems]]></category>

		<guid isPermaLink="false">http://kb.huptas.net/2007/09/11/nfs-mount-options/</guid>
		<description><![CDATA[To optimize NFS throughput and speed the following mount options could help: rw,noatime,rsize=32768,wsize=32768,soft]]></description>
		<wfw:commentRss>http://kb.huptas.net/2007/09/11/nfs-mount-options/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
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