Interesting Scientific OpenSource Applications

1. FFTW
FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data, i.e. the discrete cosine/sine transforms or DCT/DST). We believe that FFTW, which is free software, should become the FFT library of choice for most applications.

Checking a program whether it is 32-bits or 64-bits

Can use the File Package
#file Program

Installed by default by CentOS

Cloning Linux Systems With CloneZilla Server Edition (CloneZilla SE)

Article taken from HowToForge

This tutorial shows how you can clone Linux systems with CloneZilla SE. This is useful for copying one Linux installation to multiple computers without losing much time, e.g. in a classroom, or also for creating an image-based backup of a system.

Tutorial from Cloning Linux Systems With CloneZilla Server Edition (CloneZilla SE) by HowToForge

Killing Zombie Process

Use the command

# ps aux awk '{ print $8 " " $2 }' grep -w Z

Or

# top

For more information, see link Killing Zombie Process

Using Nagios 2.x/3.x on CentOS

Good articles on using Nagios on CentOS

1. Installing Nagios on CentOS 4.x/5.x
2. Nagios 3.x Documentation
3. Quick NRPE How-To On CentOS