Difference between Linux and Unix and also C and C++ and also about Shell Scripting Post: 302077738

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Operating Systems Linux Difference between Linux and Unix and also C and C++ and also about Shell Scripting Post 302077738 by saini_mw on Monday 26th of June 2006 05:17:14 AM

06-26-2006

Registered User

UNIX:- Created in the late 1960s by Ken Thompson and Dennis Ritchie at Bell Laboratories, Unix is a server-oriented operating system that was aimed to support a multi-user environment. The architecture behind Unix was to provide a simple modular operating system, yet sophisticated, to support an array of multi-user and network tasks.

LINUX:-Linux is a variant of Unix, created by Linus Torvalds, that shares common characteristics but is not identical by any means. It can run on a variety of hardware from Intel to PowerPC CPU systems. The most significant aspect about Linux is that the kernel or the core of the operating is freely distributed so developers all over the globe can modify the source code and use it for their own purposes without any licensing or IP concerns

i think it will be sufficient for your interview..
i dont know much about the C & C++ bcoz i am basically a system admin guy.

Regards.

Harinder Singh.

saini_mw

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LEARN ABOUT OPENSOLARIS

pgmtexture

pgmtexture(1)                                                 General Commands Manual                                                pgmtexture(1)

NAME

       pgmtexture - calculate textural features on a portable graymap

SYNOPSIS

       pgmtexture [-d d] [pgmfile]

DESCRIPTION

       Reads  a  portable graymap as input.  Calculates textural features based on spatial dependence matrices at 0, 45, 90, and 135 degrees for a
       distance d (default = 1).  Textural features include:

              (1) Angular Second Moment,
              (2) Contrast,
              (3) Correlation,
              (4) Variance,
              (5) Inverse Difference Moment,
              (6) Sum Average,
              (7) Sum Variance,
              (8) Sum Entropy,
              (9) Entropy,
              (10) Difference Variance,
              (11) Difference Entropy,
              (12, 13) Information Measures of Correlation, and
              (14) Maximal Correlation Coefficient.

       Algorithm taken from:
       Haralick, R.M., K. Shanmugam, and I. Dinstein. 1973. Textural features for image classification.  IEEE Transactions on  Systems,  Man,  and
       Cybertinetics, SMC-3(6):610-621.

BUGS

       The  program  can  run incredibly slow for large images (larger than 64 x 64) and command line options are limited.  The method for finding
       (14) the maximal correlation coefficient, which requires finding the second largest eigenvalue of a matrix Q, does not always converge.

REFERENCES

       IEEE Transactions on Systems, Man, and Cybertinetics, SMC-3(6):610-621.

SEE ALSO

       pgm(5), pnmcut(1)

AUTHOR

       Copyright (C) 1991 by Texas Agricultural Experiment Station, employer for hire of James Darrell McCauley.

                                                                    22 Aug 1991                                                      pgmtexture(1)