I have just read the Short Story “The Last Question” written by Isaac Asimov. Wonder-full. It is Asimov’s personal favorite. You can read it online here.
lsgvt
Posted by Fred
on 03-01-2013
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I was bored during the holidays and decided to brush up on my python skills. I have created a small python program to list the topology of a Gluster volume, called lsgvt (LiSt Gluster Volume Topology). It’s at github. To give you a small example of it’s output:
It’s usage info is:
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# lsgvt -h Usage: lsgvt [options] [volname..] This program lists the topology of Gluster volumes Options: --version show program's version number and exit -h, --help show this help message and exit -s SPACING, --spacing=SPACING The spacing between the leaves, defaults to 1 -w WIDTH, --width=WIDTH The width of the leaves, defaults to 2 -p VOLPATH, --path=VOLPATH Path to source file, defaults to /var/lib/glusterd/vols -a, --ascii Use ascii characters to draw lines instead of unicode |
Have fun using it
Consciousness
Posted by Fred
on 12-10-2012
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I am, these days, very interested in the concept of consciousness. What is the nature of it? How did it came about? How will it evolve further. We shape our world at an ever accelerating paste. So, these days I read a lot about this subject. I have read the (Pulitzer Price winning) book Dragons of Eden by my all time favorite author Carl Sagan. Currently, I am in the process of reading Shadows of Forgotten Ancestors by the same writer and his wife. If you don’t know Carl Sagan, you should. I mean, he is dead now, but he has left an enormous amount of material behind. One of my all time favorite SF books (Contact) is also from him. Planned for reading is The Selfish Gene by Richard Dawkins. On the waitinglist are some books from the master of transhumanism: Ray Kurzweil. There will be a new book from him in november: How To Create a Mind.
There are, of course, dangers to creating artificial minds. Just watch this TED Talk to see what I mean:
Other people on the reading list are Roger Penrose and Marvin Minsky.
If anyone reading this blog have some real good pointers for me for further study to deepening my knowledge on this subject, please leave a comment.
Tip: Howto disable IPv6 on RHEL6
Posted by Fred
on 24-09-2012
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The only correct way to disable IPv6 on RHEL6…is to leave it on. That is, most people in the blogophere suggest disabling one or two modules using a file in /etc/modprobe.d. This is not the correct way. These modules must stay running. The correct way is to add a config line to the following two config files:
In /etc/sysconfig/network: NETWORKING_IPV6=no
In /etc/sysctl.conf: net.ipv6.conf.all.disable_ipv6 = 1
Next: disable the IPv6 firewall: chkconfig ip6tables off
reboot.
Source for this tip is from the official SELinux troubleshoot documentation. If you do it using the modprobe method _and_ you have SELinux enabled, you’ll get AVC’s that will direct you this way.
