RPM a quick guide...

Hi,

RPM is a package management system defined by RedHat. Different distributions (Fedora, Rocks Cluster, Mandriva) and package management tools (yum) rely on it.
You can ignore the rpm command when your favorite repository provides the packages that you need however when you get a rpm from third party software provider you'll require a little knowledge about the rpm tool.

What packages are installed? rpm -qa | less
How to uninstall packages? rpm -e package_name
How to install packages? rpm -i file_name

Regards,

Green Computing

Today many of us are more conscious about our environment. Due to either high prices in combustibles or green house effect we look for ways to save energy and become more green.
Linux Journal has an article with ideas of people from different places around the world about how to save energy re-utilizing the power emitted by legacy data centers.
Take a look ;-)

Finally, recycle, turn off unnecessary lights, put your computer on hibernate mode as frequent as you can, don't waste the water; please, collaborate to save our limited resources.

'Time Machine' for Linux

Today, I was talking with a friend of mine who is a 'Mac' user.
During our conversation, she showed me the 'TimeMachine' application and I was amazed for the quality and how useful it is.

I'm a Linux fan and promptly I came back to my laptop and search for similar applications available for Linux, then, I found those:

• flyback: tool developed by 'Google' people under python. It's very simple at this time, but I expect some enhancements in the near future.  'flyback' is an early stages it is a GUI for grouping a set of tools already available on Linux.
• Dirvish: although the 'news' section suggest a high activity levels during 2003 up to 2005, there is an announcement of the dirvish guide submitted on October 2008, so the project has not die.
• TimeVault: I didn't test.
  
  

Try some one, it could save your work and 'life', :-D.

Cheers,

Port associated to Process in Linux

Many times, it's necessary to identify what application has assigned a given port. According to www.linuxquestions.org there are three ways to achieve that:

• lsof -w n -i tcp:#### 
• fuser -n tcp ####
  
• netstat -anp | grep :####

enjoy it!

Why another blog?

I have been excited for many years with concepts and technologies behind of distributed computing.
These days, I have a lot of work in the practical side of the distributed computing, and certainly, I found different drawbacks during implementing concepts and developing applications.
I will post, aperiodically, tips about how you can work with grid technologies, mainly topics related with PRAGMA, GridRPC and Groovy language.
Besides, I will keep publishing in my another blog blog-grid.blogspot.com. By now, that's all. Take care.