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+====== How to disable IPv6 ======
+<note important>These instructions will not work in Ubuntu 9.04 (Jaunty Jackalope) or anything later because ipv6 support isn't for some unknown reason a module anymore.</note>
+Current Ubuntu releases have ipv6 enabled by default and in most cases it isn't needed at least yet. Here's a short description for disabling ipv6 but start by checking if it's even enabled currently.
+<code>ifconfig | grep inet6</code>
+If that produced no output then ipv6 is already disabled. Otherwise first open (as root) the file ///etc/modprobe.d/aliases// and locate the following line:
+<code>alias net-pf-10 ipv6</code>
+and replace it with
+<code>alias net-pf-10 off</code>
+Then open ///etc/modprobe.d/blacklist// and add the following at the end of the file:
+<code>
+# disable ipv6
+blacklist ipv6
+</code>
+Next you'll have to reboot the system since that seems to be the only way to get already loaded ipv6 modules out of memory.
+It should be noted that editing only ///etc/modprobe.d/blacklist// has the same end result of getting ipv6 disabled but a log entry like
+<code>modprobe: WARNING: Not loading blacklisted module ipv6</code>
+will get added every time something in the system tries to access the net using ipv6. That can happen often in a busy system so there's no point filling log files with it.

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