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+====== Ubuntu HortonWorks ======
+  * [[Ubuntu]]
+  * [[Hadoop]]
+Install the Ubuntu OS as normal. HortonWorks supports 12.04 and 14.04.
+When partitioning the drives, do not create any swap.
+Install some packages required by HDP:
+<code>
+aptitude -y install unzip ntp nscd
+</code>
+Increase the file descriptor and processor limits. In ''/etc/security/limits.conf'':
+<code>
+* - nofile 32768
+* - nproc 65536
+</code>
+Disable IPv6 completely in ''/etc/sysctl.conf''. HortonWorks also recommends disabling swapping completely, and increasing max user instances:
+<code>
+net.ipv6.conf.all.disable_ipv6 = 1
+net.ipv6.conf.default.disable_ipv6 = 1
+net.ipv6.conf.lo.disable_ipv6 = 1
+vm.swappiness = 0
+</code>
+Apply the changes:
+<code>
+sysctl -p
+</code>
+HortonWorks recommends disabling transparent hugepages as well. Add to ''/etc/rc.local'':
+<code>
+echo never > /sys/kernel/mm/transparent_hugepage/enabled
+echo never > /sys/kernel/mm/transparent_hugepage/defrag
+</code>
+On the primary node, add the HDP Ubuntu repos:
+<code>
+wget -nv http://public-repo-1.hortonworks.com/ambari/ubuntu14/2.x/updates/2.2.0.0/ambari.list -O /etc/apt/sources.list.d/ambari.list
+apt-key adv --recv-keys --keyserver keyserver.ubuntu.com B9733A7A07513CAD
+aptitude update
+</code>
+Install the Ambari package:
+<code>
+aptitude -y install ambari-server
+</code>

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