We’re building a new exciting cluster at work using Linux HA and stuff to make it work magically. In the olden days of yore RedHat and co were using Pacemaker with the old crm (Cluster Resource Manager / Cluster Relationship Manager, pick one..) tool for cluster management, which was nice. Now it looks like RedHat [...]
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Installing Magento
One of my clients wanted an E-Commerce solution for his website and after a little bit of analysis we opted for the community edition of Magento. We wanted something based on the usual LAMP stack, that was OpenSource so it could be extended, was free as in beer, had great international support, was fully featured [...]
monit: error connecting to the monit daemon
We’re rolling out monit on our new platform at the request of a vendor to manage their new service. I’ve always been dead against these kinds of automated failure recovery tools as they often require human intervention after the fact anyway and all the platforms I’ve managed will have failed the server anyway so why [...]
Experiments In Bitcoin
Earlier today I got in to discussing Bitcoin Arbitrage with a mate of mine, with the cunning plan of creating a bot to monitor different exchanges and profit on the difference in trading prices. After an analysis this was deemed a silly idea, or conversely we aren’t good enough, as moving real money or bitcoins [...]
10 Most Used Linux Commands
Whilst skimming my Bash history today looking for an esoteric one liner I’d written earlier I started to ponder what my most used commands were, it’s easy enough to find out! This is actually output from my Mac, not a Linux box, I tricked you Chill:~ rus$ history | awk {‘print $2′} | sort | [...]
Syntax Highlighting In VIm
Syntax highlighting in vim can be super tricky, by default a lot of desktop environments seem to have white terminals, which is a bit dumb as it’s easier to read white on black than black on white, as such the default vim syntax highlighting is often unreadable if you have a black terminal, giving blue [...]
Iptables Block Outgoing Traffic
We need to give one of our customers to an internal server, for this we’ve enabled remote SSH access. Even though we trust them we don’t want anyone to use the server as a launchpad to attack other remote servers, or a launch pad to attack internal servers for that matter, in case their account [...]
BackupPC ping too slow
Whilst adding a new remote server to our BackupPC configuration, it threw the following error Contents of file /Volumes/2TB/backuppc/pc/www.server.co.uk/LOG.102011, modified 2011-10-25 13:10:23 2011-10-25 12:00:00 ping too slow: 22.21msec 2011-10-25 13:00:01 ping too slow: 49.63msec 2011-10-25 13:10:23 ping too slow: 47.79msec and refusing to back up the server! After browsing the documentation I discovered the following [...]
Linux Command Line AVI Repair
Recently I had an avi file with a broken index that needed to be repaired. After a quick search and read of some man pages I discovered these handy flags for mencoder to get the job done! mencoder -idx homemovie.avi -ovc copy -oac copy -o homemovie-repaired.avi bamo!
Changing A DRAC Password On The Command Line With racadm
All Dell DRACs come with a default account set up as root / calvin which is a huge security risk if left! The web interface doesn’t let you change the password but the firmware does when you boot the server. A second way to change the password is with the racadm tool, if installed, at [...]
