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Old 02-27-2007
With the concept of tail -f, only the script was provided, where you have the list updated in the file 'update' every 'n' seconds maintained in the for loop, if you want to refresh the list as soon as possible, decrement the sleep time.

Though I had not done extensive testing for the posted script. I just verified whether the update file is getting refreshed and it worked for me.

Am sure the required difference would be necessarily be captured.

Please post us with what is needed and whats happening! Smilie
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LOG(3)							   BSD Library Functions Manual 						    LOG(3)

NAME
log, log2, log10, log1p, -- logarithm functions SYNOPSIS
#include <math.h> double log(double x); double log2(double x); double log10(double x); double log1p(double x); DESCRIPTION
The log() function computes the value of the natural logarithm of argument x. The log2() function computes the value of the logarithm of argument x to base 2. The log10() function computes the value of the logarithm of argument x to base 10. The log1p() function computes the value of log(1+x) accurately even for very small values of x. SPECIAL VALUES
log(+-0) , log2(+-0) , and log10(+-0) return -infinity and raise the "divide-by-zero" floating-point exception. log(1) , log2(1) , and log10(1) return +0. log(x) , log2(x) , and log10(x) return a NaN and raise the "invalid" floating-point exception for x < 0. log(+infinity) , log2(+infinity) , and log10(+infinity) return +infinity. log1p(+-0) returns +-0. log1p(-1) returns -infinity and raises the "divide-by-zero" floating-point exception. log1p(x) returns a NaN and raises the "invalid" floating-point exception for x < -1. log1p(+infinity) returns +infinity. SEE ALSO
math(3), exp(3), exp2(3), expm1(3), pow(3), infnan(3) STANDARDS
The log() , log2() , log10() , and log1p() functions conform to ISO/IEC 9899:1999(E). 4th Berkeley Distribution July 2, 2003 4th Berkeley Distribution