When I updated my CentOS system and could not mount XFS file system and my op5 Monitor did not react. I even run check_disk on these mount points but op5 Monitor did not tell me that anything was wrong. So when I managed to get the system to boot and my monitoring system tell me [...]
Yesterday new CentOS kernels was released and could be updated with yum update. I did that on 3 systems and none of them worked afterwards. The first system is the machine that runs this blog. It runs Xen kernel with two virtual system.Luckily the webserver and database runs in Dom0. After update the system did [...]
This is real fun. I found another It-Slav with a blog “En it-slav i samhällets tjänst“. He seems to been blogging since 2006 and likes food. Thanks once again for copying a winner. For reference see my other blog about Copy Cat.
If you want to test that your Email system is working as supposed with op5 Monitor or Nagios, i.e. send and recieve emails. I recommend Email Delivery. Features: SMTP TLS SMTP IMAP IMAPS and much more… It simply creates an email and send it through an email system and check that the message is delivered. [...]
After succefully get your 1-wire bus working with OWFS and been able to read the temperatures, it is time to create some nice graphs. The red line is the temperature and the blue is the sliding avarage temperature the last 24 hours. I’m using RRDTools to store the data and create the graphs. If you [...]
Are you jealous at the cool scrolling signs that stockbrokers have at their offices. Of course, stock rates are boring, it is much more fun/cooler/geekier to have op5 Monitor or Nagios messages at your scrolling LED. I find one at Clas Ohlson for 37SEK approx 4 EUR, and after a late night with some perl [...]
Someone said that the best way to know that you are successful is when someone copy you. Now I found that a “new” doamin exist, it-slav.se. According to whois it was registred Jan 2007 domain: it-slav.se created: 2007-01-18 modified: 2008-06-17 expires: 2009-01-18 And it-slav.net Record created: 31 MAY 2000 Record last changed: 31 MAR 2008 [...]
I do not like spam. This a problem that grows and there are many technologies how to fight it. As I’m the sysadmin of my mailserver it makes it possible to use many approaches. The best way is to find out if it is a spam before it is accepted at the SMTP server. I’m [...]
To make my computer to be able to use the 1-wire protocol I’m using OWFS. The packages to get it running on CentOS5 or RHEL5 can be found here. It has several options and I like the client-server model mainly because it is easy to use the 1-wire stuff in perl in his case. To [...]
It all started with that I wanted to keep track of the temperature in my DataCenter, called PDC (Peters DataCenter), in my basement. I have a couple of computers running 24×7 and if the doors are closed and the outdoor temperature is hot it can get very warm. I have an op5 Monitor system that [...]
In my opinion the only install and forget OS is released in a new version. Their slogan “Only two remote holes in the default install, in more than 10 years!” tells what it is all about. Every release has a song, very often with an ironic touch. Take a look at the OpenBSD 4.4 changes, [...]
