nixCraft Linux Sys Admin Blog

Find Out What Is Happening With Open Source Software Project

Posted: 16 Jun 2008 07:00 PM CDT

Nice idea.

Michael Ogawa has created some stunning visualizations for open source software projects such as Apache, Python, Eclipse IDE, and Postgres. From the project home page:

This visualization, called code_swarm, shows the history of commits in a software project. A commit happens when a developer makes changes to the code or documents and transfers them into the central project repository. Both developers and files are represented as moving elements. When a developer commits a file, it lights up and flies towards that developer. Files are colored according to their purpose, such as whether they are source code or a document. If files or developers have not been active for a while, they will fade away. A histogram at the bottom keeps a reminder of what has come before.

Code Swarm - An experiment in organic software visualization. (via Digg)

How To Set Caching DNS Server

Posted: 16 Jun 2008 06:31 PM CDT

How do I set caching dns server to speed up dns lookup for my LAN (500 PC)? The DNS lookups creating a lot of network activity. There are a few times when this causes performance issues. How do I configure caching dns under Debian Linux?

Answer to "How To Set Caching DNS Server"

How To: UNIX Add A User To A Group

Posted: 16 Jun 2008 04:15 PM CDT

How do I add a user to a group under Sun Solaris UNIX operating system from a shell prompt or command line?

Answer to "How To: UNIX Add A User To A Group"

Squid Proxy WARNING! Your cache is running out of filedescriptors error and solution

Posted: 16 Jun 2008 12:13 PM CDT

I've Squid Proxy server with over 100 Windows workstation. I see following error message in my cache.log file - "WARNING! Your cache is running out of filedescriptors". Do I need to filter proxy server requests to avoid this problem? How do I fix this problem under CentOS / Fedora / RHEL / Debian Linux?

Answer to "Squid Proxy WARNING! Your cache is running out of filedescriptors error and solution"