Xen CPU Use per Domain againXen CPU Use per Domain again
8 years ago I wrote a script to summarise Xen CPU use per domain [1]. Since then changes to Xen required changes to the script. I have new versions for[...]
BIND Configuration FilesBIND Configuration Files
I’ve recently been setting up more monitoring etc to increase the reliability of servers I run. One ongoing issue with computer reliability is any case where a person enters the[...]
Ethernet Interface Naming With SystemdEthernet Interface Naming With Systemd
Systemd has a new way of specifying names for Ethernet interfaces as documented in systemd.link(5). The Debian package should keep working with the old 70-persistent-net.rules file, but I had a[...]
UnikernelsUnikernels
At LCA I attended a talk about Unikernels. Here are the reasons why I think that they are a bad idea: Single Address Space According to the Unikernel Wikipedia page[...]
Compatibility and a Linux Community ServerCompatibility and a Linux Community Server
Compatibility/interoperability is a good thing. It’s generally good for systems on the Internet to be capable of communicating with as many systems as possible. Unfortunately it’s not always possible as[...]
Using LetsEncryptUsing LetsEncrypt
Lets Encrypt is a new service to provide free SSL keys [1]. I’ve just set it up on a few servers that I run. Issues The first thing to note[...]
Finding Storage Performance ProblemsFinding Storage Performance Problems
Here are some basic things to do when debugging storage performance problems on Linux. It’s deliberately not an advanced guide, I might write about more advanced things in a later[...]
Sociological Images 2015Sociological Images 2015
The above sign was at the Melbourne Docks in December 2014 when I was returning from a cruise. I have no idea why there are 3 men and 1 woman[...]
LUV Server Upgrade to JessieLUV Server Upgrade to Jessie
On Sunday night I started the process of upgrading the LUV server to Debian/Jessie from Debian/Wheezy. My initial plan was to just upgrade Apache first but dependencies required upgrading systemd[...]
Mail Server TrainingMail Server Training
Today I ran a hands-on training session on configuring a MTA with Postfix and Dovecot for LUV. I gave each student a virtual machine running Debian/Jessie with full Internet access[...]