How to Fix .SDN File Extension Errors    |    What is the .SDN File Extension?    |    Scan for .SDN File Extension Errors

Run a Free Scan to check for SDN related errors.

What is the .SDN File Extension?

.SDN File Extension Description:

The SDN file is associated with the ShAr, or the Shell Archive for the UNIX system. It names the file that was made with the application. The Shell Archive is also called a shell script. Executing this application will create files with the ability to self extract its archived file. The files that will be created with the Shell Archive will have the SDN file extension. This file extension can only be created in a UNIX system, which is why the SDN file extension in this light; can only be seen in UNIX platforms.

However, just like any other archiving application, the Shell Archive works to compress files and group them as a single file that will have the SDN file extension. Also, this file extension can be un-archived, only in the standard UNIX platform. To do the extraction of the SDN file extension, the user needs the UNIX Bourne shell.

One advantage of using the SDN file extension is its ability to be a pure text file. However, it still poses some risks since when this file extension is opened, it becomes an executable file. That is why; some users who encounter the SDN file extension transfers it to the text file format as a precaution.

On the other hand, the SDN file extension function for other applications, like the Fidonet Software Distribution Network, is the same as its function for the Shell Archive. The SDN file extension is named as the compressed archive of the application. The Fidonet is an early worldwide computer network, used to communicate between different bulletin board systems. This became popular in the early 1990s before the popularity of the Internet.

The distribution of files to a certain network using Fidonet can be made easily and faster with the SDN file extension. This file extension creates a compressed archive that is more organized and smaller in size, than its normal counterparts. Aside from being a compressed archive file, the SDN file extension is also an ingredient for the Smart Diary Suite.

Author: Programming Sunrise Ltd., FidoNet, and UNIX Systems
Author URL:,,
Related Applications: Shell Archive, Fidonet Software Distribution Network, Smart Diary Suite
Common Path: C:/ Program Files/


Run a Free Scan to check for SDN related errors & to optimize PC performance.

Do you have errors with .SDN files?

What Causes .SDN files Errors?

A common and likely explanation for .SDN files errors is damage in the Windows program registry - fixing is essential to avoid additional corruption in other applications and/or system devices. While the errors remain your PC stays capable of likely blue screen errors, hardware failure and fatal crashes.

.SDN files Errors - Common Symptoms:

Common symptoms with .SDN files errors include poor system performance, extended program start up times, trouble saving documents, long breaks in program functions, programs shuts down without showing an error, input halts and programs crash.

Helpful Tools

The following products are free to try. We have found them to be of the highest quality and value. They have been extremely useful in our own pc troubleshooting and maintainance and we highly recommend trying them out for yourself.

Anti-Malware Pro

With a lightning fast free scan and the largest authentic spyware detection database we have seen, Anti-Malware Pro finds and removes threats to your PC stability and security. Download Anti-Malware Pro


DriverFinder will scan your system for driver and software updates. Its easy to use interface makes keeping your drivers updated quick and simple. They will even send you an email notification when new driver updates are available for your system! It doesn't get any more convenient than this. Download DriverFinder

Browse File Extensions by Name:

Is your File Extension missing?

Help us to make the best resource we possibly can by submitting you very own file extension details. If you have detailed information on any file extensions please let us know by visiting the following link.

Submit File Details Form

What is the .SDN File Extension?    |    Scan for .SDN File Extension Errors    |    How to Fix .SDN File Extension Errors