02-10-2014
Read input files and merge them in given order and write them to input one param or one file
Dear Friends,
I am looking for a shell script to merge input files into one file .. here is my idea:
1st paramter would be outfile file (all input files content)
read all input files and merge them to input param 1
ex: if I pass 6 file names to the script then 1st file name as output file and merge rest of 5 files to 1st file:
cat file1 file2 file3 file4 file5 file6 > file1
i want above to be executed at end but trying to figure out how to read input params and call that cat command at end... the reason becuase input files are dynamic.. some times it could be 4 files, some times 5 and 8 are most input files... so script needs to read all input files and based on the count it needs to issue the cat command at end as per the no of input params..
any information would be greatly appriciated.
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LEARN ABOUT DEBIAN
unsort
UNSORT(1) BSD General Commands Manual UNSORT(1)
NAME
unsort -- reorder lines in a file in semirandom ways
SYNOPSIS
unsort [-hvrpncmMsz0l] [--help] [--version] [--random] [--heuristic] [--identity] [--concatenate] [--merge] [--merge-random] [--seed integer]
[--zero-terminated] [--null] [--linefeed] [file ...]
DESCRIPTION
unsort prints the lines in the input files (or standard input) in semi-random order. Available algorithms are a Mersenne Twister based PRNG
and a heuristic algorithm that aims to create a subjective even distribution.
Command line options
-h, --help
Display a concise summary of the available options and argument syntax.
-v, --version
Display version and copyright information.
-r, --random
Use the Mersenne Twister based randomization algorithm.
-p, --heuristic
Use the heuristic "shuffling" algorithm which permutes the lines in such a way that they're spread more or less evenly in the output.
This is the default.
-n, --identity
Do not reorder lines in the input. Useful if you just want to merge the files.
-r, --concatenate
Concatenate all input files then apply the shuffling algorithm to the result as a whole.
-m, --merge
Shuffle all input files seperately then merge the result. Equal-sized files will be merged in the order in which they appear on the
command line.
-M, --merge-random
Shuffle all input files seperately then merge the result. Equal-sized files will be merged in random order. This is the default.
-s, --seed integer
Use this integer as a seed, instead of random data from the environment.
-z, --zero-terminated, -0, --null
Lines are terminated with a character.
-l, --linefeed
Lines are terminated with a
character. This is the default.
SEE ALSO
sort(1)
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