Listing numeric strings alone


 
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Old 07-29-2011
Java Listing numeric strings alone

i have a file called 'test.txt' which contains the below data.

abc123
123445
123abc
23224q

From the above data, i want to display the line which contains only numeric [0-9]. So i have tried the below commands with sed

Code:
sed -n '/^[0-9]$/p' test.txt
 
sed '/^[0-9]$/!d' test.txt

But it doesn't work as expected.
Please help me to achieve this

thanks

Last edited by pludi; 07-29-2011 at 04:03 AM..
 
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fmin(3M)						  Mathematical Library Functions						  fmin(3M)

NAME
fmin, fminf, fminl - determine minimum numeric value of two floating-point numbers SYNOPSIS
c99 [ flag... ] file... -lm [ library... ] #include <math.h> double fmin(double x, double y); float fminf(float float x, float y); long double fminl(long double x, long double y); DESCRIPTION
These functions determine the minimum numeric value of their arguments. NaN arguments are treated as missing data: if one argument is a NaN and the other numeric, these functions choose the numeric value. RETURN VALUES
Upon successful completion, these functions return the minimum numeric value of their arguments. If just one argument is a NaN, the other argument is returned. If x and y are NaN, a NaN is returned. ERRORS
No errors are defined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
fdim(3M), fmax(3M), math.h(3HEAD), attributes(5), standards(5) SunOS 5.11 12 Jul 2006 fmin(3M)