Category Archives: Software
Yum on Red Hat 5 hangs when using proxy
I had a machine that started hanging when running yum update on it. And the only way to actually stop yum then was to kill the process from another shell, pretty strange. I noticed that it was trying to look … Continue reading
Wrong charset for cron
I got a issue on a export job i had that was running daily on which the charset of the data exported wer wrong, and this did not happen when i ran the job manually. I noticed that Cron used … Continue reading
Getting Windows 2008 server uptime via the command line
A simple one liner to get hold of Windows 2008 server uptime: systeminfo | find "System Boot Time"
The effects of old NIC drivers on Data Protector
During the Data Protector migration we noticed that the performance on the new Data Protector Cell Manager was a lot lower than the performance on the old solution. Speeds of around 100Mbit was the best we ever could get from … Continue reading
Dataprotector: System error: HOST_NOT_FOUND
I have been working a bit with migrating a Data Protector cell manager, when moving a client i recieved the following error: [Critical] From: BDA-NET@ " [/boot]" Time: 02.09.2011 09:08:03 Cannot connect to Media Agent on system , port 49708 … Continue reading
Expanding a kVM disk image
Had to expand a KVM virtual machine today. Luckily, that`s pretty straight forward. You simply create a new disk image with the extra size needed, merge it into the original disk and voila. Then you just need to partition in … Continue reading
Tuning Ubuntu mdadm RAID5/6
If you are using mdadm RAID 5 or 6 with Ubuntu, you might notice that the performance is not all uber all the time. Reason for this is that the default tuning settings for Ubuntu is set to rather motdest … Continue reading
WordPress giving maintenance error message
If you have tried to upgrade a WordPress plugin or WordPress itself, and failed. You might have ended up with your blog only returning “Briefly unavailable for scheduled maintenance. Check back in a minute.” error message. The reason for this … Continue reading
Change hostname on Linode VPS
Linode explains pretty well how to change the hostname of your VPS. But they do not mention that in the latest Ubuntu it is set via Linode`s own DHCP server. So even if you set it via /etc/hostname and in … Continue reading
Guide: Solr performance tuning
Introduction I have for the last year been working a lot with the Solr search engine, and figuring out how to get the best performance from a Solr instance. And it is almost funny how much impact the little things … Continue reading