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	<title>Ali Abbas &#187; Unix / Linux</title>
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	<link>http://alouche.net/blog</link>
	<description>Unix - Networking - News</description>
	<lastBuildDate>Sun, 11 Jul 2010 17:05:15 +0000</lastBuildDate>
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		<item>
		<title>Linux Kernel Out of Memory Management</title>
		<link>http://alouche.net/blog/2010/07/11/linux-kernel-out-of-memory-management/</link>
		<comments>http://alouche.net/blog/2010/07/11/linux-kernel-out-of-memory-management/#comments</comments>
		<pubDate>Sun, 11 Jul 2010 17:02:22 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[Unix / Linux]]></category>
		<category><![CDATA[kernel]]></category>
		<category><![CDATA[memory management]]></category>

		<guid isPermaLink="false">http://alouche.net/blog/?p=895</guid>
		<description><![CDATA[-ENOMEM Error &#8211; OOM state When the kernel needs to allocate memory to a process, its first action is to check whether or not that requested memory is available.. To achieve is, the kernel makes sure that the requested memory is globally available on the system excluding 3% reserved for root process and that the [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>Linux Kernel Route Cache</title>
		<link>http://alouche.net/blog/2010/05/15/linux-kernel-route-cache/</link>
		<comments>http://alouche.net/blog/2010/05/15/linux-kernel-route-cache/#comments</comments>
		<pubDate>Sat, 15 May 2010 05:13:05 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[Networking]]></category>
		<category><![CDATA[Unix / Linux]]></category>
		<category><![CDATA[kernel]]></category>
		<category><![CDATA[network]]></category>
		<category><![CDATA[stack]]></category>

		<guid isPermaLink="false">http://alouche.net/blog/?p=876</guid>
		<description><![CDATA[To understand the importance of the routing cache, it is important to keep in mind and visualize the 3 main routing hash tables in use in the kernel for routing decisions&#8230; the Route Cache (what we will be discussing), the Route Policy Database and the Route Table. It is also in this order that the [...]]]></description>
		<wfw:commentRss>http://alouche.net/blog/2010/05/15/linux-kernel-route-cache/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>MySQL performance on ZFS filesystem</title>
		<link>http://alouche.net/blog/2010/04/28/mysql-performance-on-zfs-filesystem/</link>
		<comments>http://alouche.net/blog/2010/04/28/mysql-performance-on-zfs-filesystem/#comments</comments>
		<pubDate>Wed, 28 Apr 2010 19:38:31 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[Unix / Linux]]></category>
		<category><![CDATA[solaris]]></category>
		<category><![CDATA[zfs]]></category>

		<guid isPermaLink="false">http://alouche.net/blog/?p=843</guid>
		<description><![CDATA[A 52mn presentation by Allan Packer and Neelakanth Nadgir from Sun Microsystems. ** keep in mind ZFS can only be used in userspace on linux (through fuse) due to license comptability issue (GPL/BSD license) enjoy! www.youtube.com/watch?v=a31NhwzlAxs]]></description>
		<wfw:commentRss>http://alouche.net/blog/2010/04/28/mysql-performance-on-zfs-filesystem/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>ClamAV 0.94 end of life</title>
		<link>http://alouche.net/blog/2010/04/17/clamav-094-end-of-life/</link>
		<comments>http://alouche.net/blog/2010/04/17/clamav-094-end-of-life/#comments</comments>
		<pubDate>Sat, 17 Apr 2010 18:47:52 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[Unix / Linux]]></category>
		<category><![CDATA[clamav]]></category>
		<category><![CDATA[scanner]]></category>
		<category><![CDATA[virus]]></category>

		<guid isPermaLink="false">http://alouche.net/blog/?p=819</guid>
		<description><![CDATA[So &#8211; I was greeted today with a mail queue pilling up and the ClamAV daemon crashing root@mail:/# /etc/init.d/clamav-daemon start Starting ClamAV daemon: clamd LibClamAV Warning: *********************************************************** LibClamAV Warning: ***  This version of the ClamAV engine is outdated.     *** LibClamAV Warning: *** DON&#8217;T PANIC! Read http://www.clamav.net/support/faq *** LibClamAV Warning: *********************************************************** LibClamAV Error: cli_hex2str(): Malformed hexstring: [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>PHP OPCodes Cached with APC – part 2</title>
		<link>http://alouche.net/blog/2009/10/21/lamp-php-opcodes-cached-with-apc-part-2/</link>
		<comments>http://alouche.net/blog/2009/10/21/lamp-php-opcodes-cached-with-apc-part-2/#comments</comments>
		<pubDate>Wed, 21 Oct 2009 16:15:37 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[LAMP]]></category>
		<category><![CDATA[Unix / Linux]]></category>
		<category><![CDATA[tweaking]]></category>

		<guid isPermaLink="false">http://alouche.net/blog/?p=716</guid>
		<description><![CDATA[Before reading this post, I recommend going over part 1 PHP OPCodes Cached with APC – part 1 In the first part we tackled what OPCodes are and how APC helps us streamline webserver performance by caching recurring script execution. In this second part, we will mostly look at the APC configuration main variable and [...]]]></description>
		<wfw:commentRss>http://alouche.net/blog/2009/10/21/lamp-php-opcodes-cached-with-apc-part-2/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>PHP OPCodes Cached with APC &#8211; part 1</title>
		<link>http://alouche.net/blog/2009/10/21/lamp-php-opcodes-cached-with-apc-part-1/</link>
		<comments>http://alouche.net/blog/2009/10/21/lamp-php-opcodes-cached-with-apc-part-1/#comments</comments>
		<pubDate>Wed, 21 Oct 2009 10:18:40 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[LAMP]]></category>
		<category><![CDATA[Unix / Linux]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[tweaking]]></category>

		<guid isPermaLink="false">http://alouche.net/blog/?p=700</guid>
		<description><![CDATA[There are many caching system in use to optimize the execution of PHP script on busy web/database servers. Today we will focus on the OPcode caching method using APC. Before we start&#8230; what is an OPcode? The OPcode is an executable code generated each time a PHP script is interpreted and compiled. Each time you [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>mcelog &#8211; monitor hardware issues</title>
		<link>http://alouche.net/blog/2009/10/17/mcelog-monitor-hardware-issues/</link>
		<comments>http://alouche.net/blog/2009/10/17/mcelog-monitor-hardware-issues/#comments</comments>
		<pubDate>Sat, 17 Oct 2009 10:56:35 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[Unix / Linux]]></category>

		<guid isPermaLink="false">http://alouche.net/blog/?p=613</guid>
		<description><![CDATA[It is often the case to receive a call in the middle of the night or walk into the office and find out a server which failed due to hardware problems. What is mcelog? From the project site description mcelog decodes machine check events (hardware errors) on x86-64 machines running a 64-bit Linux kernel. It [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>qtcreator-collec2-ld-returned-1-exit-status</title>
		<link>http://alouche.net/blog/2009/09/14/qtcreator-collec2-ld-returned-1-exit-status/</link>
		<comments>http://alouche.net/blog/2009/09/14/qtcreator-collec2-ld-returned-1-exit-status/#comments</comments>
		<pubDate>Mon, 14 Sep 2009 18:07:21 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[Unix / Linux]]></category>
		<category><![CDATA[ld]]></category>
		<category><![CDATA[librairies]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[qt]]></category>

		<guid isPermaLink="false">http://alouche.net/blog/?p=384</guid>
		<description><![CDATA[When facing this error&#8230; manually cd into the project QT folder and run &#8220;make&#8221;&#8230; ld would return the library name it isn&#8217;t able to locate. Example: ali@laptop:~/Documents/Dev/QT-Progs/Test$ make g++ -Wl,-rpath,/opt/qtsdk-2009.03/qt/lib -o Test main.o testhello.o moc_testhello.o    -L/opt/qtsdk-2009.03/qt/lib -lQtGui -L/opt/qtsdk-2009.03/qt/lib -L/usr/X11R6/lib -pthread -lfreetype -lgobject-2.0 -lSM -lICE -pthread -pthread -lXrender -lfontconfig -lXext -lX11 -lQtCore -lm -pthread -lgthread-2.0 -lrt [...]]]></description>
		<wfw:commentRss>http://alouche.net/blog/2009/09/14/qtcreator-collec2-ld-returned-1-exit-status/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>How to install Acrobat Reader on Centos</title>
		<link>http://alouche.net/blog/2009/06/17/how-to-install-acrobat-reader-on-centos/</link>
		<comments>http://alouche.net/blog/2009/06/17/how-to-install-acrobat-reader-on-centos/#comments</comments>
		<pubDate>Wed, 17 Jun 2009 19:18:11 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[Redhat/Centos]]></category>
		<category><![CDATA[simple howtos]]></category>

		<guid isPermaLink="false">http://alouche.net/?p=361</guid>
		<description><![CDATA[1. go to acrobat.com/reader 2. download the bin linux install file 3. chmod +x AdbeRdr9.1.1-1_i486linux_enu.bin 4. ./AdbeRdr9.1.1-1_i486linux_enu.bin Extracting files, please wait. (This may take a while depending on the configuration of your machine) This installation requires 144 MB of free disk space. Enter installation directory for Adobe Reader 9.1.1 [/opt] (press enter) The installation will [...]]]></description>
		<wfw:commentRss>http://alouche.net/blog/2009/06/17/how-to-install-acrobat-reader-on-centos/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>How to change sudo cache timeout</title>
		<link>http://alouche.net/blog/2009/05/19/how-to-change-sudo-cache-timeout/</link>
		<comments>http://alouche.net/blog/2009/05/19/how-to-change-sudo-cache-timeout/#comments</comments>
		<pubDate>Tue, 19 May 2009 16:42:36 +0000</pubDate>
		<dc:creator>Ali Abbas</dc:creator>
				<category><![CDATA[Unix / Linux]]></category>
		<category><![CDATA[howtos]]></category>

		<guid isPermaLink="false">http://alouche.net/?p=332</guid>
		<description><![CDATA[For those who wishes to change the sudo cache timeout for a specific user, let&#8217;s userA sudo visudo or (su &#8211; then visudo) Defaults:userA timestamp_timeout=20 We have now set the sudo timeout &#8220;password-less&#8221; prompt to 20mn, to make it infinite set it to -1 If for some reasons you have it set it to 20 [...]]]></description>
		<wfw:commentRss>http://alouche.net/blog/2009/05/19/how-to-change-sudo-cache-timeout/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
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