http://ipv6.he.net/certification/ This was really fun! If you complete this with your own domain and server you'll learn to set up these: set up IPv6 address and routing point your DNS to the IPv6 address - this would applies mostly if you have your own nameserver point the …

Ever thought about studying a bit of programming? Thought it was a too daunting task? I've just gone through the second lesson on learnstreet and it's quite fun! It doesn't take long to go through the first two lessons, so if you don't have much time you can spend a …

Do you have IPv6 connectivity? Perhaps a server and a domain name already set up? http://ipv6.he.net/ Some things you get to play with: check if you can view the page in IPv6 send an e-mail over IPv6 rDNS over IPv6 Quite fun way of learning about IPv6 …

Introduction Recently I've had the pleasure of installing Ubuntu on my desktop. Here are some thoughts and what I initially do: Machine is a: Motherboard: Gigayte GA-EX58-UD3R CPU: Intel Core i7 Memory: 8GB Disks: Intel i300 SSD, 2x500GB and 1x3TB Western Digital Drives Graphics Card: AMD HD6800 Here are some …

Building on the initial post about cfengine we're going to try out some things that may actually be useful. My goal would be to make /etc/resolv.conf identical between all the machines. The server setup is the lustre cluster we built in a previous post. In this post you'll …

pdsh This a software to run commands on a set of servers. For example 'pdsh -a uname -av' will give you "uname -av" of all machines. http://techsnail.com/howtos-tutorials/installing-pdsh-on-hpc-cluster/ It can be installed from rpmforge.0 wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.x86_64 …

http://cfengine.com/what-is-cfengine It's a (old) software that is used to make sure that (for example) the same config files are used on all machines. There are several other CMSs, for example puppet. Wikipedia has a nice overview of them. Let's use the lustre machines we set up in …

Introduction Lustre is a filesystem often used by clusters because many computers can mount the filesystem simultaneously. This is a small log/instruction for how to setup Lustre in 3 virtualized machines (one metadata server, one object storage server and one client). Basic components: VMWare Workstation 3 x CentOS 6 …

Bicycling Is Fun! Bicycle up to and over a fog covered Golden Gate bridge, pretty awesome downhills! Eaten at a relative's french gourmet food (not expensive!) - it's name is: sous beurre. It is up on 24th mission street together with a cafe called sugarlump. Went to great coffee place called …

Enabled! Wonder if there's been lots of exploits for this method of writing posts? Turns out there are lots of old exploits for wordpress and xmlrpc, apparently it may also leave the page open for bruteforce attacks.. I'll leave this one disabled. But I bet there are other ways to …