Background
It is always a good idea to monitor the server hardware, in many cases the root cause of the probblem is hardware related like: a fan stops and the temperature gets to high, dust in the machine makes it to hot, disks that fails, memory corruption and so on. This article will describe howto enable [...]
I have an old iPod G3 player that I haven’t used for several years. The main reason is that it is full of Apple vendor lock-in "features". The most annoying issues are:
Hard to manage without iTunes
iTunes is crap
Cannot play ogg and flac
I just want to attach it and it should popup like a USB disk, drop [...]
Background
I was with my geekfriends at a ski resort and I managed to get an Internet connection using a cellphone. Of course I wanted to share it with my friends. As geeks we brought a switch and a couple of ethernetcables.
Solution
Using this script on a Ubuntu 9.10 I managed to share my connection:
sudo ifconfig eth0 10.8.16.1
sudo sysctl -w net.ipv4.ip_forward=1
sudo [...]
My laptop and cellular phone has both Bluetooth and it has annoyed me for a while that I have not managed to get a working Internet connection using Bluetooth. I have only managed to get it working with a USB cable between my phone and laptop.
After some Google search and reading of man pages I finally [...]
After fiddeling with my Bluetooth GPS reciever I wanted my friends and my wife to keep track of me. I wanted to use OpenStreetMap because I really like the idea of free and open maps instead of the unintelligible Google Maps licenses. The result can be seen here where I show the op5 office location outside Stockholm, Sweden.
Pre [...]
Every computer geek ends up with a bunch of disks with unknown status in the drawer. It can be rather cumbersome to put them in a machine and check the status especially if some are SATA and others are PATA, it gets even more complicated if they are mixed 3.5" and 2.5".
In situations like this [...]
Background
When I worked as a Tivoli Consultant I spend a lot of time investigating the customer processes and workflow and try to make the monitoring solution to support this. It was often long term projects and involved alot of people like, project managers, support staff, maintenance staff, application owners, applicataion engineers, operating systemens managers, DBAs and [...]
In RedHat, CentOs and Suse and probaly other Linux distributions, the way of enabling and disabling a service at reboot is by using chkconfig. In ubuntu, the way of turning on and off a services at boot is by using update-rc.d. It changes the links for the init scripts.
To start a script in [...]
I have read the book "Cacti 0.8 Network Monitoring, Monitor your network with ease!" by Dinangkur Kundu and S.M.Ibrahim Lavlu. The book is 116 pages.
According to the book the target audience for this book is for anyone who wants to manage a network using Cacti. To read the book you do not need to be [...]
op5 AB is a world leading OSM – Open Source Management – company that delivers software based on open source for control of IT systems and networks. The award winning op5 Monitor is now released with important enhancements that will enable customers and other vendors to further improve usability and integration for optimized IT monitoring. [...]
Background
As a former Novell employee there is one software I really miss and that is iFolder. It is an excellent file syncronization software. You configure iFolder where your local iFolder files are located and what server to syncronize against. Do a sync and now they are avilable at any iFolder instance if you sync against [...]
I just come back from this years slackathon. It was interersting to meet some of the persons on the OpenBSD mailing lists.
I have to admitt that most of the presentations was to deep into the kernel to my knowledge but I liked the conferances anyhow.
The Slackathon was the end of a Hackathon mostly founded by [...]
I’ll attend this years Slackathlon in Stockholm. I hope I will see you there
Welcome to this years Slackathon!
It will be held August 15th, at the Stockholm University, though not in
the same conference room as the previous years, since it couldn’t hold
all visitors anymore!
As previous years, the website is slowly getting into shape, and
probably wont hold [...]
Background
I use MythTV quite frequently and noticed that it is instable when using sasc-ng as a decoder to decrypt encrypted DVB-T channels. So approximatly every third day the MythTVbackend server stops and need to be started again. I have wriiten an earlier article about howto monitor MythTV with Nagios or op5 Monitor so I get [...]
The conferance about Nagios in Stockholm has started. The event will be broadcasted on internet. If you have questions to the speakers you could enter them directly into the Nordic meet on Nagios homepage or to nmn@jabber.org using jabber protocol.
In my drawer I found a GPS reciever for my cellular, I have never used it because the GPS software in my phone is crap. But when I found it, I realized that it might work to connect it via bluetooth to my laptop so I could have a stratum 1 NTP server at home. [...]
The Merlin project was initially started to create an easy way to set up distributed Nagios installations allowing Nagios processes to exchange information directly as an alternative to the standard nagios way using NSCA. When starting the Ninja project we realised that we could continue the work on Merlin and adopt the project to function [...]
Background
This article describe howto use a USB camera (also known as webcam) to detect motions and send an alarm to Nagios or op5 Monitor. It can be used in datacenters to send an alert if someone or something is moving or at home to detect if someone is in your house. I will place the [...]
I have been noticing an increasing number of telemarketing phonecalls the last weeks and I would like to avoid having those callers disturbing me or my family. They have been calling at 9am, 11am, 1pm, 8pm during the weekdays, saturday and sunday.
I have been running an asterisk system to handle my VoIP calles the last [...]
My manager has confirmed that I will go to GoOpen 2009 in Oslo, Norway 16-17 April
op5 is a bronze sponsor and will have a booth where it will be possible to talk to me and my collegues face to face. My biggest problem is if I want to see Mamma Mia or meet Jon Maddog [...]
Background
My blog that uses MySQL as the database backend suddenly got real performance issues. The symptoms where:
All my Nagios test failed from time to time with NRPE timeout
The performence of my dynamic webpages was terrible slow.
The load on the system showed very heavy load, more then 10 for 1, 5, and 15 minutes.
When using [...]
This article describe howto get a 1-wire humidity probe to work with Nagios or op5 Monitor.
In an earlier article I have described a 1-wire temperature plugin.
Pre requriments
To get it working you need:
1-wire humidity probe i.e. this, it is based on DS2438 & HIH-4000
A working owfs installation, instructions can be found here
Nagios or op5 [...]
It-Slav.net is proud to announce as one of the temperature providers to temperatur.nu
It-slav.net provides temperature measurement for STHLM/Huddinge area in Sweden to the very popular site temperatur.nu
The measurment is done by a 1-wire temperature probe DS18S20.
My firewall get alot of failed ssh logins.
This is a typical log message in /var/log/authlog
Feb 9 20:15:49 pedro sshd[30934]: Failed password for root from 67.205.85.119 port 35603 ssh2
Feb 9 20:15:49 pedro sshd[2656]: Received disconnect from 67.205.85.119: 11: Bye Bye
Feb 9 20:15:51 pedro sshd[15299]: Failed password for root from 67.205.85.119 port 35753 ssh2
Feb 9 20:15:51 pedro [...]
This guide describe howto install and configure SNMP on Ubuntu.
In an earlier article I have described howto set it up on RHES or CentOS, it is slightly different in Ubuntu.
1.Installation
root@ibsen:~# sudo apt-get install snmpd
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following packages were automatically installed and are no longer required:
libmpich1.0gf libdc1394-22 genisoimage [...]
