Easy PHP Search in Firefox

Niall has created a quick Opensearch file to add the PHP Function search to the search bar of Firefox 2 And IE7. If anyone is interested it’s available here.

For those that don’t know, this feature has existing in KDE in multiple forms for some time. For example, pressing ALT-F2 opens the Run Command dialog and typing, for example:

will bring up PHP.net’s own search page. The same goes for the location bar in Konqueror.

By the way, other nice short cuts in the Run Command dialog include:

  • gg: <keywords> for a quick Google search;
  • wp: <keywords> for a quick Wikipedia search;
  • dict: <keyword> for a quick dictionary look-up;
  • man: <keyword> for a man page look-up;
  • info: <keyword> for an info page look-up;
  • rfc: <number> to be brought to the relevant RFC page;

Of course, entering a command will execute it and just entering a URL will open it in Konqueror.

lft :: Layer Four Trace

Colin pointed out a useful utility called lft in response to a question on IIU. lft looks like a useful alternative traceroute application as it claims to have the ability to identify stateful inspection firewalls and other useful information.

What I found immediately attractive was the -A option which displays the AS numbers of addresses along the path and also the -N which looks up and displays the network names.




Nagios Plugin for the Promise VTrak 200i

For a project I was working on, I installed a Promise VTrak M200i disk shelf (i for iSCSI but then that’s a whole other blog post!) and needed to add it into the customers management systems.

Unfortunately there didn’t seem to be a lot of information out there on Promise’s SNMP MIBs so with a bit of playing about, I was able to dig out the ones I needed. The Nagios plug-in I wrote and am making available here will monitor the shelf via SNMP and alert on the following chassis issues:

  • critical if any of the shelf’s disk states changes from “OK”;
  • warning if the battery state changes from “FullyCharged”;
  • critical if either of the PSU states change from “Powered On and Functional”;
  • critical is any of the cooling devices (fans) change from “Functional”;
  • critical if any of the temperature sensors’ states change from “normal”;
  • critical if any of the drives go offline or are missing; and
  • warning if any of the drives go into the rebuilding state or have their PFA flag set.

While this is specifically designed for a single M200i, it should be easily customisable for other models.

It can be downloaded from here (http://www.opensolutions.ie/). It will also appear on the development section of this site and Nagios Plugins.

OIDs Used
The table of physical disk statuses.
The battery status.
The table of Power Supply Unit statuses.
The table of cooling device/fan statuses.
The table of temperature sensor statuses.
The number of drives that are offline.
The number of drives in the PFA status set.
The number of drives in rebuild status.
The number of drives that are missing.

Nagios Alerts via SMS with Kapow

I have a client who required a Nagios installation with alerting via SMS (*). They use Kapow as their SMS gateway.

There were two aspects required:

  1. The sending of alerts via the SMS gateway;
  2. The monitoring of available credits on the SMS gateway;


1. Send Alerts via SMS Gateway

The sendsms script is:

I use a quick hack with PHP to URL encode the string. I didn’t know a shell command off hand but I’m open to suggestions. This can be tested with:

Edit /etc/nagios/misccommands.cfg to include the following:

Ensure your /etc/nagios/contacts.cfg is updated to include notification by SMS with your mobile number:

Sin é.


2. Monitor SMS Gateway Credits

The plugin code is:

Create a plugin configuration file for Nagios, say /etc/nagios-plugins/config/sms_credits.cfg:

Where $ARG1$ is the warning threshold and $ARG2$ is the critical threshold.

I add the service to the Nagios monitoring box via /etc/nagios/config/sms_credit.cfg:

And I believe that’s it.

*) The monitoring box is in a different country to the servers it monitors so a network failure will not prevent the alert getting out.

Putting /etc Under Subversion (SVN)

A Google for the above took some work to locate the exact recipe I wanted for this. The problem is that one really needs to do an ‘in-place’ import. The solution was from Subversion‘s own FAQs (specifically this) which is reproduced here with some changes: