spoiler alert! Top 3 Position Competitor Alias Total Time to Solve 1 aretea 42 mins 13 secs 2 & 3 martbhell 47 mins 12 secs 2 & 3 mgubenko 47 mins 21 secs The challenges Recording from this event Chennai I was best! Took 21mins 28seconds Still 21 minutes was quite a …

Have been trying these web based Linux servers challenges out for a little while. seems to be a young service. They have a Linux World Cup coming up soon. Today is the last day to register! After participating in CTF these challenges were not so hard but interesting with new …

Background Story I had this great webhost. They had the first $SHELL I ever used. I learnt a lot about bash scripting there. I ran eggdrops and IRC clients and used screen :D I experienced the hacks when they got pwned, because those things happened back then (2001-2002 probably). Anyway …

Finally got around to sorting out an issue which basically was that the TV+Chromecast near the TV was on another network than the media server and thus I couldn't stream videos by using my phone. I've been thinking lately and in previous posts that maybe I should just get …

Reason: Testing to Lustre 2.5 from a clean CentOS 6.5 install in an openstack. Three VMs: two servers, one MDS, one OSS and one Client. CentOS65 on all. An open internal ethernet network for the lustre traffic (don't forget firewalls). Yum updated to latest kernel. Two volumes presented …

Trying out Arch Linux on a Lenovo T400! First step after getting the T400 Dual Core Centrino 2.26GHz 4GB RAM: replace the 160GB spinning rust to a 120GB Samsung 840. Very easy to take out the old disk and put the new SSD in the carrier. https://wiki.archlinux …

Post 1 - https://www.guldmyr.com/red-hat-clustering-and-storage-management-course-objectives/ Where I checked out udev, multipathing, iscsi, LVM and xfs. This post is about getting using luci/ricci to get a Red Hat cluster working, but not on a RHEL machine because sadly I do not have one available for practice purposes. So …

Attending "Red Hat Enterprise Clustering and Storage Management" in August. Quite a few of these technologies I haven't touched upon before so probably best to go through them before the course. Initially I wonder how many of these are Red Hat specific, or how many of these I can accomplish …

This week in the SDN course on coursera there were lots of examples of real use of SDN stuff, for example like the B4 WAN by Google. They got a really interesting and cool interview with the Network Lead at Google - Amin Vahdat. And! They actually put this interview up …

Is what I did this week during the SDN Course on Coursera :) Within mininet or with a real OpenFlow capable switch, you can point the switch to use a controller. The controller would figure out all the smart stuff and the switch only does what the controller tells it to …