// Light At The End Of The Tunnel System Administration – Light At The End Of The Tunnel

Light At The End Of The Tunnel

systems administration meanderings

Configuring Exanic’s under CentOS 6

We use the Exablaze Exanic X4 cards at work. The manual does explain what you have to do but doesn’t give you the CentOS/RHEL specifics. I’m assuming the driver is already installed. The first thing to notice is that when the exanic.ko module is installed it creates the /dev/exanic0 device. The permissions on this driver crw-rw---- 1 root root 10, 58 Aug 27 21:46 /dev/exanic0 This is ok if your software runs as root. Read more →

CentOS 6.5 on Super Micro HFT server

Recently I had the chance to test the Super Micro 6027ax-72rf-hft3 server, which is meant for HFT environments, being over clocked including the supported network cards. I was aiming to run performance tests with the ExaNIC X2 from Exablaze. Unfortunately, the Super Micro website doesn’t list CentOS 6.5 as a supported operating system. My first couple of attempts in installing CentOS 6.5 on this server resulted in kernel panics, upon investigation I realised it was not seeing the disk controller. Read more →

Recovering my Billion 7404VGPX

I’ve always liked Billion ADSL routers, this was my third or fourth over the years. One is still being used by my in-laws. This one I used for a while and then tried to upgrade the firmware. Unfortunately, it failed during the update and this stopped it working properly. I bought a Belkin and to say I’m disappointed is an understatement. It’s ok as a ADSL modem, but as a router it’s limited. Read more →

Retrieving sunset from BOM

I needed to find the sunset time, so I can turn on my path lights for a couple of hours each night. The BOM usually display the sunrise and sunset times when they provide the weather forecast. Having looked at the site I found that it provides a tool, via Geoscience Australia, to find out the sunset and sunrise times each day or for a whole year. As I needed the sunset time I came up with a command to retrieve it [bash]LATHEMI=south #Latitude Hemisphere LONGHEMI=east #Longitude hemisphere LOCATION=SOMEWHERE #Your location LATDEG=0 #Latitude degrees LATMIN=0 #Latitude minutes LATSEC=0 # Latitude seconds LONGDEG=0 # Longitude degrees LONGMIN=0 # Longitude minutes LONGSEC=0 # Longitude seconds STATE=“NT%20-%20Darwin%20(most%20location)” #Australian state DST=No #Daylight Savings Time (Yes|No) TZ=10 #Timezone UTCOFF=10 #Offset from UTC ATZ="(EST) #Eastern Standard Time LT=“00:00:00 PM” #Time making the call AUSTZONE="+10" EVENT=1 TIMEZONE="+10" DATE=date +"%d/%m/%Y" Read more →

Fedora 17 on Macbook Air

At work we use CentOS and RedHat, therefore we work with and produce RPMs. I wanted my MacBook Air to be able to build RPMs and also act as a build server for when I need to build servers at a new location. I had previously installed Ubuntu and Cornice without too many issues. This post gave me hope that the install would go well. I firstly created a USB stick to perform the install. Read more →