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RemoteSystemStatus

Brandon Burke
December 10, 2009

Overview

Remote System Status allows users to monitor a Linux server through a web interface over the Internet. Users can view hardware and software data, monitor system statistics, find the server's geographical location, view a screenshot, and remotely shutdown/reboot.

Screenshot

Concepts Demonstrated

• Linear recursion and iteration were used to parse some of the system statistics.
• Explicit dispatch is used to call the appropriate functions.
• Message passing style dispatch is used to direct program flow.
• Lists were used to represent system information as structures.
• Let* was used to utilize sequential local variable definitions.

External Technology

• The scheme/system library was used to call a TCL script that parsed some of the system statistics.
• The scheme/port library was used to read output from the command line.
• The web-server/servlet-env was used to direct flow and serve the HTTP responses.
• The web-server/servlet library was used to accept HTTP requests.
• The SXML library was used to request the geolocation XML data.
• The SXPath library was used to parse the geolocation XML data.

Innovation

There aren't many web-based Linux system monitoring applications out there. I haven't seen any that provide geolocation data.

Technology Used Block Diagram

Additional Remarks

I spent a lot of time trying to get OpenSSL to work to make the web application more secure but I had a hard time building the certificate chain. Web design is not fun in scheme.