Author Archive

15 Jun
2011

Fedora 15: Nagios errors

Installation of Nagios on Fedora 15 is easy as yum install nagios nagios-plugins* php nrpe. I only found one problem: Error: Could not read object configuration data! The webserver runs as user apache, which cannot access /etc/nagios/objects by default. Chmod or chown the directory to fix it, or add user

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IT, Linux | 4 Comments » | Tags: ,

15 Jun
2011

OpenVPN: script failed: could not execute external program

I've been using the great VPN software OpenVPN for a long time now. I just love it. Today, I copied the configuration of my old router to my brand new Fedora 15 box, and suddenly it can't start anymore. In the logs I found this message: script failed:

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IT | 1 Comment » | Tags: , ,

11 Jun
2011

Updating the Dell PERC H200 firmware

My brand new Dell R300 servers contain a PERC H200 SAS/SATA controller that has pretty bad firmware. Luckily, Dell released better firmware, but you'll need to update it yourself.
  • Install and boot RedHat 5.6 or CentOS 5.6
  • Download the file RAID_FRMW_LX_R294620.BIN from the Dell support site
  • run

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IT | No Comments » | Tags: , , , ,

11 Jun
2011

Review: Belkin KVM Omniview 5216K

A few months ago I got myself quite an expensive new device: a Belkin Omniview 5216K, model no F1DP216G. With this device, I'm supposed to be able to access the KVM of up to 16 servers. I can install them servers remotely (over PXE or virtual

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Hardware, IT | No Comments » | Tags: , , , , ,

5 Jun
2011

Printing from a CUPS server to Windows 7

A colleague of mine has some family issues that require him to be home more often. However, work continues. So he started working at home with a laptop. Nothing special about that. What is special, is that we're running a piece of software ("RR") that has old-style telnet-like terminals, which

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IT | No Comments » | Tags: , , , , , ,

5 Jun
2011

WordPress: custom links on plugin page

Since WordPress 2.8, you can easily add your own links to the plugin page. This can be useful to jump right to the settings of the plugin. Example code: 
<span style="color: #000000; font-weight: bold;">function</span> set_plugin_meta<span style="color: #009900;">&#40;</span><span style="color: #000088;">$plugin_meta</span><span style="color: #339933;">,</span> <span style="color: #000088;">$plugin_file</span><span style="color: #339933;">,</span> <span style="color: #000088;">$plugin_data</span><span style="color: #339933;">,</span> <span style="color: #000088;">$status</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#123;</span>

<span style="color: #b1b100;">if</span> <span style="color: #009900;">&#40;</span>plugin_basename<span style="color: #009900;">&#40;</span><span style="color: #009900; font-weight: bold;">__FILE__</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">!=</span><span style="color: #000088;">$plugin_file</span><span style="color: #009900;">&#41;</span> <span

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IT, Linux | No Comments » | Tags: , ,

5 Jun
2011

An Asterisk 1.8 fax server

To start, I setup a clean, minimal Fedora 15 installation.

Install requirements

After installation, we install a few more tools that we need: yum install asterisk asterisk-fax #base yum install perl-Email-MIME libtiff-tools #for mailer script yum install telnet mc vim ntp rsync #for convenience and backup Synchronize your time: sntp

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IT, Linux | No Comments » | Tags: , , , , , ,

29 May
2011

Dracut: add drivers to your initrd

My HP 8150w laptop has this neat lis3lv02d accelerometer to be able to detect when it's falling and to park the harddisk to prevent damage. I use this instrument to detect whether I'm on the road or at the office. This way, I can set preferences at boot-time, even before

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IT | No Comments » |

28 May
2011

Find the Dell Service Tag Remotely

Windows with VNC/RDP

If you can login to the computer over VNC or RDP, you can use wmic to find the service tag: start > run > cmd On the command line, enter: wmic bios get serialnumber

Windows without VNC/RDP

If you cannot login to the computer over VNC or

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Hardware, IT, Linux, Windows | No Comments » | Tags: , , , , , ,

25 May
2011

Lovelock: Mozilla as default browser from Thunderbird

Last week, I upgraded to Fedora 15 (codename: Lovelock). One of the new annoying "features" is that Google Chrome somehow got to be the default browser when I click a link from Firefox. I Google'd around, and couldn't find how to fix it. So I decided to … Read more

IT | 3 Comments » | Tags: , , ,

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