Welcome to It-Slav.Net blog
Peter Andersson
peter@it-slav.net

I've already got a female to worry about. Her name is the Enterprise.
-- Kirk, "The Corbomite Maneuver", stardate 1514.0

 
Background
After waiting for the Hummingbird release for the LaFonera 2.0G a long time and discussed with the Fon support team when 3G dongles will work, I gave up and installed OpenWRT on my LaFonera 2.0G router.
 
I’m sorry FON, you have a cool idea and nice routers but your unlogical approach to the users and communtity, finally got [...]

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Background
After getting fedup with the bad fon support I decided to give a new wireless router a try. After browsing internet and openwrt forums I thought that a Linksys WRT160NL would fulfill my requirements:
The requrements are:

N
3G USB dongle
Cheap

 

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26
May

This is old news but still important.
 

- OpenBSD 4.7 RELEASED ————————————————-

May 19, 2010.

We are pleased to announce the official release of OpenBSD 4.7.
This is our 27th release on CD-ROM (and 28th via FTP). We remain
proud of OpenBSD’s record of more than ten years with only two remote
holes in the default install.

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I’m the happay owner of a Huawei E1750 modem and it is real easy to get it running in Ubuntu. This guide will probably work with many other 3G USB modems.
Just type from the command line:

sudo apt-get install usb-modeswitch

Plug in the modem
Go to the Network manager and enter your Mobile Broadband credentials and now it works!

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02
May

 
I wanted to unlock my operator locked Huawei e1750 modem. After googling I found this page in swedish.
The unlock code can be calculated by using the IMEI number, the unlock code is sent by using AT commands.
I have succesfully tested this on e1750 and e1550.
I also tried it on e220 and it did not work.

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Filled Under: Hints, english, sysadmin

 
With my new and fancy HTC Desire I wanted to look at my Nagios or op5 Monitor status. I have found two apps Nagroid and NagMonDroid.
 

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Background
I bought a Fonera 2.0g WLAN router and I wanted to extend the functionality to have the possibility to add packages from OpenWRT. I also wanted the possibility to manage my new router with ssh.
The way to achive this is by installing developer firmware.

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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 [...]

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After the problems I have had with Bredband2, I want to test Phonzo.se as a new VoIP provider.
I registered on their homepage and after a couple of days I got a snail mail with my credentials.
I configured my FreePBX and calling in worked directly, but not outgoing. After 2 hours of troubleshooting I started to google "phonzo asterisk" and found several [...]

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Background
I was reading the Swedish computer magazine, Tech World. There was an article about an appliance solution that could give a report about unused switch ports. The box PortIQ from Infoblox costs approximatly 10.000 Euro.
op5 has developed this feature at a customer site and is included with op5 Monitor, op5 has published the code as opensource.
This [...]

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Background
This article will describe how easy it is to integrate other tools to Nagios or op5 Monitor. I will use an example with a webshop where a business view of how the webshop is doing is implemented by using a GPL’d rule engine, NodeBrain. I have in an earlier article described the ruleset for this implementation [...]

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18
Oct

Many people have received their 4.6 CDs in the mail by now, and we
really don’t want them to be without the full package repository.

————————————————————————
- OpenBSD 4.6 RELEASED ————————————————-

Oct 18, 2009.

We are pleased to announce the official release of OpenBSD 4.6.
This is our 26th release on CD-ROM (and 27th via FTP). We remain
proud of OpenBSD’s [...]

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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 [...]

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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 [...]

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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. [...]

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Next week, op5 will release the new Nagios GUI called Ninja. The license is GPL and several people has reported the GUI work perfectly well on vanilla Nagios. Ninja uses a database backend. Merlin, another op5 developed software feeds the Nagios information into the database.
Links:

op5 -OpenSource based management software company
Ninja- Nagios Is Now Just Awesome
Merlin [...]

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Background
This article is describing best practice I have collected after a 10 year period with Systems- and Network  management. My role has varied between consultant, trainer, systems engineer, project manager and architect.
 
Very many programs creates log files. They are great for trouble shooting and in some cases the only place to find out if there [...]

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Filled Under: Hints, english, sysadmin
27
Aug

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 [...]

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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 [...]

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Background
This article describes how to monitor an IPSEC tunnel running on OpenBSD. I could not find any plugin already done so I created my own.
The pre req. for this article are:

A working Nagios or op5 Monitor setup
A IPsec VPN tunnel running on OpenBSD
A working NRPE agent at the OpenBSD box

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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 [...]

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When using a database that are business critical it can be a good idea to monitor the internals. This article describe how-to monitor MySql with Nagios or op5 Monitor. In these case it runs a MythTV system but it could be almost anything.

Pre requirements
The pre requriements for this article is a working Nagios or op5 [...]

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There are several ways of monitor a wordpress blog by using Nagios or op5 Monitor.
Wordpress uses the following parts to work:

Webserver frontend
PHP scripts
MySQL database backend
At least one system to run it on

I found one article describing howto monitor the Webserver and the MySQL database and even that a certain webpage contain a certain phrase. But [...]

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03
Mar

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 [...]

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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 [...]

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