Need a free command-line utility to sort a big flat file (>10Mb) on fields at specific position.
A few years ago, I was using something called bigsort.exe on OS/2 but I can't find something similar.
Windows comes with a sort utility:
C:\Documents and Settings\Administrator>sort /? SORT [/R] [/+n] [/M kilobytes] [/L locale] [/REC recordbytes] [[drive1:][path1]filename1] [/T [drive2:][path2]] [/O [drive3:][path3]filename3] /+n Specifies the character number, n, to begin each comparison. /+3 indicates that each comparison should begin at the 3rd character in each line. Lines with fewer than n characters collate before other lines. By default comparisons start at the first character in each line. /L[OCALE] locale Overrides the system default locale with the specified one. The ""C"" locale yields the fastest collating sequence and is currently the only alternative. The sort is always case insensitive. /M[EMORY] kilobytes Specifies amount of main memory to use for the sort, in kilobytes. The memory size is always constrained to be a minimum of 160 kilobytes. If the memory size is specified the exact amount will be used for the sort, regardless of how much main memory is available. The best performance is usually achieved by not specifying a memory size. By default the sort will be done with one pass (no temporary file) if it fits in the default maximum memory size, otherwise the sort will be done in two passes (with the partially sorted data being stored in a temporary file) such that the amounts of memory used for both the sort and merge passes are equal. The default maximum memory size is 90% of available main memory if both the input and output are files, and 45% of main memory otherwise. /REC[ORD_MAXIMUM] characters Specifies the maximum number of characters in a record (default 4096, maximum 65535). /R[EVERSE] Reverses the sort order; that is, sorts Z to A, then 9 to 0. [drive1:][path1]filename1 Specifies the file to be sorted. If not specified, the standard input is sorted. Specifying the input file is faster than redirecting the same file as standard input. /T[EMPORARY] [drive2:][path2] Specifies the path of the directory to hold the sort's working storage, in case the data does not fit in main memory. The default is to use the system temporary directory. /O[UTPUT] [drive3:][path3]filename3 Specifies the file where the sorted input is to be stored. If not specified, the data is written to the standard output. Specifying the output file is faster than redirecting standard output to the same file.
although the ported version (GNU Win32) is much more flexible.
For completeness, Cygwin contains sort, and the usual suspects of GNU command line utilities (and much more).
GNU Win32 sort should be similar, since they're coming from the same sources (though probably have different versions at any given time).