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Top Forums Shell Programming and Scripting Remove duplicate lines from a 50 MB file size Post 302577582 by vsachan on Tuesday 29th of November 2011 11:14:36 AM
Old 11-29-2011
the problem is that the file size is 100 MB - 150 MB

input file:
---------
1,2, ,TTT,DDFG,
1,2, ,TTT,DDFG,
1,2, ,TTT,DDFG,
7,8, ,TTT,DDFG,
1,2, ,TTT,DDFG,
1,2, ,TTT,DDFG,

output file should be like:
1,2, ,TTT,DDFG,
7,8, ,TTT,DDFG,
 

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WCSDUP(3)						     Linux Programmer's Manual							 WCSDUP(3)

NAME
wcsdup - duplicate a wide-character string SYNOPSIS
#define _GNU_SOURCE #include <wchar.h> wchar_t *wcsdup(const wchar_t *s); DESCRIPTION
The wcsdup() function is the wide-character equivalent of the strdup(3) function. It allocates and returns a new wide-character string whose initial contents is a duplicate of the wide-character string pointed to by s. Memory for the new wide-character string is obtained with malloc(3), and should be freed with free(3). RETURN VALUE
The wcsdup() function returns a pointer to the new wide-character string, or NULL if sufficient memory was not available. ERRORS
ENOMEM Insufficient memory available to allocate duplicate string. CONFORMING TO
POSIX.1-2008. This function is not specified in POSIX.1-2001, and is not widely available on other systems. SEE ALSO
strdup(3), wcscpy(3), feature_test_macros(7) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. GNU
2009-02-04 WCSDUP(3)
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