Asterisk is a free telephony software. I’m posting here sample commented configuration files for reference purposes, hoping they will help you get kickstarted if needed.

This config sets up :

• SIP phones (for softphones or harware phones with SIP capabilities)
• Voice mails
• A few test phone numbers
• Forwarding of calls to a SIP provider for outbound and incoming calls (from/to PSTN)

That should be plenty already for a SOHO environment !

Note to French readers : Si votre FAI est Free, cette configuration fonctionne pour passer / recevoir des appels via le SIP de Free (Freephonie).

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I’m running an OpenVPN server, configured in bridging mode.

I had quite a bit of trouble getting OpenVPN to start after networking is up, but before the the bridge is setup so that the tap0 device, which is created by OpenVPN can be added to the bridge.

The solution is simpler : let the tap0 be automatically created and added to the bridge by Gentoo Linux, then start OpenVPN with a config file instructing to use the already created tap0 device.

This post shows the configuration snippets to get things started in the right order on Gentoo.
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One of the features of bash I’ve too long overlooked is its history expansion. In this post I’ll show a few examples to get a grip at it.
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This Perl one-liner is intended to print the 10 most frequent client IP addresses in an Apache log file. It can easily be recycled to count anything, though.
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If you’re looking for CPU usage statistics and system performance on IBM AIX, sar might just be the tool your looking for. It’ll display information for 5 minutes intervals from midnight to current time. The output looks like this :
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This code snippet demonstrates how easy it is to collect your twitter @mentions in Perl, coupled with curl for simplicity.
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When working as a systems administrator, you’ll always end up having to solve a file system full error in a hurry. Here are a few commands and hints to help you get out of it quickly on a UNIX like system.
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Sometimes automatically running scripts in production environments are simply monitored by emails. Those scripts may run on schedule or be triggered by events and they send an email (for example to the technical support level 1) upon completion of the job. The content of the email will then give information about the outcome of the execution of the script.

This posts lists a few ideas that you might find useful to implement when in such an environment.

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Firefox will load whatever URL is in the copy-paste buffer in the page if you middle click somewhere on a page. My mouse’s wheel also serves as the middle button, and I found it really annoying that when occasionally middle-clicking while scrolling the page, Firefox would try to load another page …

You can control this behaviour with this about:config property middlemouse.contentLoadURL. Set to true, the middle-click on the page will load the URL (if it is one) in the page, set to false it won’t.

Thanks Ayman !

Finance::Quote is a Perl module which can be used to obtain stock information from various internet sources. I thought I’d rather share this code snippet as an example showing how easy it is to use, before I turn it into a bloatware with an SQL backend to compute average price per share and what not

So here is a simple snippet demonstrating how to get the price of a stock :
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