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<channel>
	<title>Coretanium &#187; Blog</title>
	<atom:link href="http://www.coretanium.net/category/blog/feed" rel="self" type="application/rss+xml" />
	<link>http://www.coretanium.net</link>
	<description>tech blah blah</description>
	<lastBuildDate>Tue, 29 Jun 2010 15:39:18 +0000</lastBuildDate>
	<generator>http://wordpress.org/?v=2.9</generator>
	<language>en</language>
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			<item>
		<title>incoming.mx</title>
		<link>http://www.coretanium.net/incoming-mx</link>
		<comments>http://www.coretanium.net/incoming-mx#comments</comments>
		<pubDate>Thu, 18 Mar 2010 12:27:52 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/?p=363</guid>
		<description><![CDATA[;; QUESTION SECTION:
;incoming.mx.                   IN      MX
;; ANSWER SECTION:
incoming.mx.            86400   IN      MX     [...]]]></description>
			<content:encoded><![CDATA[<p>;; QUESTION SECTION:<br />
;incoming.mx.                   IN      MX</p>
<p>;; ANSWER SECTION:<br />
incoming.mx.            86400   IN      MX      10 mx.incoming.mx.</p>
<p>;; ADDITIONAL SECTION:<br />
mx.incoming.mx.         86400   IN      A       109.169.26.23</p>
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			<wfw:commentRss>http://www.coretanium.net/incoming-mx/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Postfix maximum email size</title>
		<link>http://www.coretanium.net/postfix-maximum-email-size</link>
		<comments>http://www.coretanium.net/postfix-maximum-email-size#comments</comments>
		<pubDate>Thu, 11 Mar 2010 14:23:22 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[Postfix]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/?p=360</guid>
		<description><![CDATA[The default &#8220;message_size_limit&#8221; is set to 10240000 bytes which is approximately 10MB. To change it, add/modify the message_size_limit line in your main.cf to;
message_size_limit = 20480000
The above is roughly 20MB and is more than enough on a typical server.
]]></description>
			<content:encoded><![CDATA[<p>The default &#8220;message_size_limit&#8221; is set to 10240000 bytes which is approximately 10MB. To change it, add/modify the message_size_limit line in your main.cf to;</p>
<p><code>message_size_limit = 20480000</code></p>
<p>The above is roughly 20MB and is more than enough on a typical server.</p>
]]></content:encoded>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Qmail smtproutes</title>
		<link>http://www.coretanium.net/qmail-smtproutes</link>
		<comments>http://www.coretanium.net/qmail-smtproutes#comments</comments>
		<pubDate>Thu, 11 Mar 2010 14:19:21 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[Qmail]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/?p=358</guid>
		<description><![CDATA[If you ever need to route mail destined for a certain domain through a smarthost you can edit/create the following file;
/var/qmail/control/smtproutes
The contents is straight forward&#8230; to relay mail destined for domain.com through smtp.yourdomain.com add the following;
domain.com:smtp.yourdomain.com
If you want to relay ALL mail through smtp.yourdomain.com add;
:smtp.yourdomain.com
]]></description>
			<content:encoded><![CDATA[<p>If you ever need to route mail destined for a certain domain through a smarthost you can edit/create the following file;</p>
<p><code>/var/qmail/control/smtproutes</code></p>
<p>The contents is straight forward&#8230; to relay mail destined for domain.com through smtp.yourdomain.com add the following;</p>
<p><code>domain.com:smtp.yourdomain.com</code></p>
<p>If you want to relay ALL mail through smtp.yourdomain.com add;</p>
<p><code>:smtp.yourdomain.com</code></p>
]]></content:encoded>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Dell OMSA reports No controllers found.</title>
		<link>http://www.coretanium.net/dell-omsa-reports-no-controllers-found</link>
		<comments>http://www.coretanium.net/dell-omsa-reports-no-controllers-found#comments</comments>
		<pubDate>Tue, 09 Mar 2010 06:42:10 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>
		<category><![CDATA[Linux]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/dell-omsa-reports-no-controllers-found</guid>
		<description><![CDATA[During a routine scheduled upgrade window I upgraded to the latest Dell OMSA on a range of Dell PowerEdge servers running CentOS. After the upgrade, shell scripts that check the health of disks started reporting that no storage controllers can be found.

# omreport storage pdisk controller=0
Invalid controller value. Read, controller=0
No controllers found.

After some digging through [...]]]></description>
			<content:encoded><![CDATA[<p>During a routine scheduled upgrade window I upgraded to the latest Dell OMSA on a range of Dell PowerEdge servers running CentOS. After the upgrade, shell scripts that check the health of disks started reporting that no storage controllers can be found.</p>
<p><code><br />
# omreport storage pdisk controller=0<br />
Invalid controller value. Read, controller=0<br />
No controllers found.<br />
</code></p>
<p>After some digging through the Dell mailling lists it became apparent that i&#8217;m missing the Dell Firmware Tools on my installation. Installing the firmware tools solved the problem.</p>
<p><code><br />
# yum -y install dell_ft_install</p>
<p># srvadmin-services.sh restart<br />
</code></p>
<p>Once done, all was fine.</p>
]]></content:encoded>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Adding an ISO repository on XenServer 5.5</title>
		<link>http://www.coretanium.net/adding-an-iso-repository-on-xenserver-5-5</link>
		<comments>http://www.coretanium.net/adding-an-iso-repository-on-xenserver-5-5#comments</comments>
		<pubDate>Sat, 06 Mar 2010 09:38:24 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>
		<category><![CDATA[Xen]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/adding-an-iso-repository-on-xenserver-5-5</guid>
		<description><![CDATA[In order to do advanced installs or installations where there are no templates under XenCenter and you wish to use your own custom ISO images, you can add an ISO repository. The following steps outlines what needs to be done;
mkdir -p /var/opt/xen/iso_import
Copy your ISO image to this directly, but be careful as the control domain [...]]]></description>
			<content:encoded><![CDATA[<p>In order to do advanced installs or installations where there are no templates under XenCenter and you wish to use your own custom ISO images, you can add an ISO repository. The following steps outlines what needs to be done;</p>
<p>mkdir -p /var/opt/xen/iso_import</p>
<p>Copy your ISO image to this directly, but be careful as the control domain filesystem has limited space and if this fills up, unpredictable behaviour will follow.</p>
<p>Next up you need to create the repository by running</p>
<p><br/><code>xe sr-create name-label=ISOs type=iso device-config:location=/var/opt/xen/iso_import device-config:legacy_mode=true content-type=iso</code></p>
<p><br/>You need to mount the new repository so it&#8217;s available on XenCenter</p>
<p><code>xe-mount-iso-sr /var/opt/xen/iso_import</code></p>
<p>You can now proceed to create your VM using the ISO repository you just added.</p>
]]></content:encoded>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Solaris Core Install Recipe</title>
		<link>http://www.coretanium.net/solaris-core-install-recipe-2</link>
		<comments>http://www.coretanium.net/solaris-core-install-recipe-2#comments</comments>
		<pubDate>Mon, 08 Feb 2010 23:34:38 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>
		<category><![CDATA[Solaris]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/?p=342</guid>
		<description><![CDATA[This is a recipe I use when installing Solaris 10 (Core only). It&#8217;s easier to install the needed software than to trim down a full install and I like the fact that I have a clean server to start off with the minimal software installed.
For disk layout, you can do whatever your comfortable with or [...]]]></description>
			<content:encoded><![CDATA[<p>This is a recipe I use when installing Solaris 10 (Core only). It&#8217;s easier to install the needed software than to trim down a full install and I like the fact that I have a clean server to start off with the minimal software installed.</p>
<p>For disk layout, you can do whatever your comfortable with or follow the software that will be running on your servers guides for setting up the disk slices etc.</p>
<p>Start by installing only the core product, If I remember correctly it&#8217;s around 1.2GB in size. Once this has been done, and you have logged into your machine install the following packages from DVD/CD-ROM;</p>
<p><code>mkdir /mnt/cdrom<br />
mount -F hsfs /dev/dsk/c0t2d0s2 /mnt/cdrom<br />
pkgadd -d /mnt/cdrom/Solaris_10/Product/*ssh*</code></p>
<p>This will install;</p>
<p>SUNWsshcu SUNWsshdr SUNWsshdu SUNWsshr and SUNWsshu</p>
<p><code>pkgadd -d /mnt/cdrom/Solaris_10/Product/SUNWbash</code></p>
<p>Generate host keys;</p>
<p><code>/lib/svc/method/sshd -c<br />
svcadm enable ssh<br />
svcadm restart ssh</code></p>
<p>Or another way of generating host keys;</p>
<p><code>cd /etc/ssh<br />
ssh-keygen -t rsa -f ssh_host_rsa_key<br />
ssh-keygen -t dsa -f ssh_host_dsa_key<br />
svcadm enable ssh<br />
svcadm restart ssh<br />
</code></p>
<p>Install openssl, wget either from DVD/CD-ROM or you can grab it from the sunfreeware.com FTP site.</p>
<p>vi get_files.sh</p>
<p><code>#!/bin/sh</p>
<p>cd /tmp</p>
<p>ftp -i -n -v ftp.sunfreeware.com &lt;&lt; EOF<br />
user "anonymous" "your@email.com"<br />
cd pub/freeware/sparc/10<br />
bin<br />
mget gzip-1.4-sol10-sparc-local<br />
mget wget-1.12-sol10-sparc-local.gz<br />
mget libintl-3.4.0-sol10-sparc-local.gz<br />
mget openssl-0.9.8l-sol10-sparc-local.gz<br />
mget libiconv-1.13.1-sol10-sparc-local.gz<br />
mget libgcc-3.4.6-sol10-sparc-local.gz<br />
bye<br />
EOF</code></p>
<p>:wq</p>
<p>chmod +x get_files.sh</p>
<p>./get_files</p>
<p>Once downloaded, install gzip first as you&#8217;ll need it to extract the rest of the archived packages you just downloaded;</p>
<p><code>pkgadd -d . gzip-1.4-sol10-sparc-local all<br />
gunzip *.gz<br />
pkgadd -d . &lt;packagename&gt; all</code></p>
<p>You now have a basic skeleton machine with SSH, bash and wget.</p>
]]></content:encoded>
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		</item>
		<item>
		<title>Linux &amp; Solaris enable/disable X on boot</title>
		<link>http://www.coretanium.net/linux-solaris-enabledisable-x-on-boot</link>
		<comments>http://www.coretanium.net/linux-solaris-enabledisable-x-on-boot#comments</comments>
		<pubDate>Sun, 07 Feb 2010 20:44:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>
		<category><![CDATA[Solaris]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/linux-solaris-enabledisable-x-on-boot</guid>
		<description><![CDATA[Linux Disable automatic startup of X on boot Change the default run level in /etc/inittab to 3 id:3:initdefault:
Enable automatic startup of X on boot Change the default run level in /etc/inittab to 5 id:5:initdefault:
Solaris 10
Disable automatic startup of X on boot # /usr/dt/bin/dtconfig -d
Enable automatic startup of X on boot # /usr/dt/bin/dtconfig -e
]]></description>
			<content:encoded><![CDATA[<p><strong><span style="TEXT-DECORATION: underline">Linux</span></strong> <br/><br/>Disable automatic startup of X on boot <br/>Change the default run level in /etc/inittab to 3 <br/><code>id:3:initdefault:</code></p>
<p>Enable automatic startup of X on boot <br/>Change the default run level in /etc/inittab to 5 <br/><code>id:5:initdefault:</code></p>
<p><strong><span style="TEXT-DECORATION: underline">Solaris 10</span></strong></p>
<p>Disable automatic startup of X on boot <br/><code># /usr/dt/bin/dtconfig -d</code></p>
<p>Enable automatic startup of X on boot <br/><code># /usr/dt/bin/dtconfig -e</code></p>
]]></content:encoded>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Solaris 10 text mode installation</title>
		<link>http://www.coretanium.net/solaris-10-text-mode-installation</link>
		<comments>http://www.coretanium.net/solaris-10-text-mode-installation#comments</comments>
		<pubDate>Sun, 07 Feb 2010 14:30:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>
		<category><![CDATA[Solaris]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/?p=278</guid>
		<description><![CDATA[To install Solaris in text mode, do the following from OBP;
boot cdrom - w
Your solaris installation will start in text mode.
]]></description>
			<content:encoded><![CDATA[<p>To install Solaris in text mode, do the following from OBP;</p>
<p><code>boot cdrom - w</code></p>
<p>Your solaris installation will start in text mode.</p>
]]></content:encoded>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>PowerDNS Multiple MySQL Backends</title>
		<link>http://www.coretanium.net/powerdns-multiple-mysql-backends</link>
		<comments>http://www.coretanium.net/powerdns-multiple-mysql-backends#comments</comments>
		<pubDate>Sun, 10 Jan 2010 13:14:38 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Blog]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[PowerDNS]]></category>

		<guid isPermaLink="false">http://www.xnetcore.com/powerdns-multiple-mysql-backends/</guid>
		<description><![CDATA[http://doc.powerdns.com/modules.html
To launch two backends of the same&#160;type, you can assign a name to each launch like this;
launch=gmysql:connection1,gmysql:connection2
gmysql-connection1-host=10.10.10.1gmysql-connection1-user=pdnsgmysql-connection1-dbname=pdns
gmysql-connection2-host=10.10.10.2gmysql-connection2-user=pdnsgmysql-connection2-dbname=pdns
]]></description>
			<content:encoded><![CDATA[<p><font color="#0066cc"><a href="http://doc.powerdns.com/modules.html" target="_blank">http://doc.powerdns.com/modules.html</a><a href="http://doc.powerdns.com/modules.html"></a></font></p>
<p>To launch two backends of the same&nbsp;type, you can assign a name to each launch like this;</p>
<p>launch=gmysql:connection1,gmysql:connection2</p>
<p>gmysql-connection1-host=10.10.10.1<br />gmysql-connection1-user=pdns<br />gmysql-connection1-dbname=pdns</p>
<p>gmysql-connection2-host=10.10.10.2<br />gmysql-connection2-user=pdns<br />gmysql-connection2-dbname=pdns</p>
]]></content:encoded>
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		</item>
		<item>
		<title>Debian reset root password</title>
		<link>http://www.coretanium.net/debian-reset-root-password</link>
		<comments>http://www.coretanium.net/debian-reset-root-password#comments</comments>
		<pubDate>Wed, 21 Oct 2009 09:20:10 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Debian]]></category>
		<category><![CDATA[Linux]]></category>

		<guid isPermaLink="false">http://www.coretanium.net/debian-reset-root-password</guid>
		<description><![CDATA[In order to reset the password, you need to boot your debian installation into single user mode. You can do this by following the steps below;
1. Once grub menu comes up, select the&#160;single user&#160;entry&#160;and press &#8216;e&#8217;2. Select the kernel &#8230; line and press &#8216;e&#8217; once again3. Append &#8216;init=/bin/bash&#8217; at the end of line and press [...]]]></description>
			<content:encoded><![CDATA[<p>In order to reset the password, you need to boot your debian installation into single user mode. You can do this by following the steps below;</p>
<p>1. Once grub menu comes up, select the&nbsp;single user&nbsp;entry&nbsp;and press &lsquo;e&rsquo;<br />2. Select the kernel &hellip; line and press &lsquo;e&rsquo; once again<br />3. Append &lsquo;init=/bin/bash&rsquo; at the end of line and press b to boot</p>
<p>You will be dropped into a shell, next you need to mount the filesystem in read/write mode in order to change the password.</p>
<p>5. mount -n -o remount,rw /<br />6. passwd<br />7. reboot</p>
<p>That&rsquo;s all there is to it!</p>
]]></content:encoded>
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