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Top Forums UNIX for Dummies Questions & Answers How to reduce multiple files into a specific number of files Post 302304426 by aryanbelank on Monday 6th of April 2009 11:16:38 AM
Old 04-06-2009
Sorry if I wasn't clear. I have a set of input files ranging anywhere from 4 to 15
Input File: File 1,File2 ....File 15

I need to merge/cat these input files into fewer number of files.

For example:
1) If the argument is 1 (meaning if I need just 1 output file) then all the 15 files must be concatenated into 1.
2) If the argument is 5, File1,2,3 cat'ed to 1st output file and so on
3) If the argument is 3 , Files 1,2,3,4,5 cat'ed to 1st output file and so on
 

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CAT(1)							      General Commands Manual							    CAT(1)

NAME
cat - catenate and print SYNOPSIS
cat [ -u ] [ -n ] [ -s ] [ -v ] file ... DESCRIPTION
Cat reads each file in sequence and displays it on the standard output. Thus cat file displays the file on the standard output, and cat file1 file2 >file3 concatenates the first two files and places the result on the third. If no input file is given, or if the argument `-' is encountered, cat reads from the standard input file. Output is buffered in the block size recommended by stat(2) unless the standard output is a terminal, when it is line buffered. The -u option makes the output completely unbuffered. The -n option displays the output lines preceded by lines numbers, numbered sequentially from 1. Specifying the -b option with the -n option omits the line numbers from blank lines. The -s option crushes out multiple adjacent empty lines so that the output is displayed single spaced. The -v option displays non-printing characters so that they are visible. Control characters print like ^X for control-x; the delete char- acter (octal 0177) prints as ^?. Non-ascii characters (with the high bit set) are printed as M- (for meta) followed by the character of the low 7 bits. A -e option may be given with the -v option, which displays a `$' character at the end of each line. Specifying the -t option with the -v option displays tab characters as ^I. SEE ALSO
cp(1), ex(1), more(1), pr(1), tail(1) BUGS
Beware of `cat a b >a' and `cat a b >b', which destroy the input files before reading them. 4th Berkeley Distribution May 5, 1986 CAT(1)
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