Sponsored Content
Top Forums UNIX for Dummies Questions & Answers How to reduce multiple files into a specific number of files Post 302304487 by aryanbelank on Monday 6th of April 2009 02:59:00 PM
Old 04-06-2009
What you have done is cat'ing all files into 1, but the number of input files is a variable and can be anything from 4 to 15 and number of files to be merged/cat'ed is also variable.

If no_of_input files is 15, and no_of_output files is any of the following (samples)

1) 1 then all the 15 files must be concatenated into 1.
2) 5, File1,2,3 cat'ed to 1st output file and so on
3) 3 Files 1,2,3,4,5 cat'ed to 1st output file and so on
4) 0-->Invalied entry
5) 16 -->Invalied entry
6 15 -->Do nothing ( because there are already 15 files)

If no_of_input files is 10, and no_of_output files is
1) 1 then all the 10 files must be concatenated into 1.
2) 5, File1,2 cat'ed to 1st output file and so on
3) 10- Do nothing (because there is already 10 files)
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Creating large number of files of specific size

Hi I am new to shell scripting.I want to create a batch file which creates a desired number of files with a specific size say 1MB each to consume space.How can i go about it using for loop /any other loop condition using shell script? Thanks (3 Replies)
Discussion started by: swatideswal
3 Replies

2. UNIX for Dummies Questions & Answers

Unix command to count the number of files with specific characters in name

Hey all, I'm looking for a command that will search a directory (and all subdirectories) and give me a file count for the number of files that contain specific characters within its filename. e.g. I want to find the number of files that contain "-a.jpg" in their name. All the searching I've... (6 Replies)
Discussion started by: murphysm
6 Replies

3. Shell Programming and Scripting

Replace text in SPECIFIC multiple files

I have a list of files with different file names and ext that i need replace(saved as file_list.txt.) i just want to replace from a specific file list. i obtain an error saying lint not found. Plz help. Thx perl -e "s/$NAME/$T_NAME/gi;" -pi $(find . -type f | xargs -0 lint -e < file_list.txt) (0 Replies)
Discussion started by: yvmy
0 Replies

4. Shell Programming and Scripting

highly specific search and replace for a large number of files

hey guys, I have a directory with about 600 files. I need to find a specific word inside a command and replace only that instance of the word in many files. For example, lets say I have a command called 'foo' in many files. One of the input arguments of the 'foo' call is 'bar'. The word 'bar'... (5 Replies)
Discussion started by: ksubrama
5 Replies

5. Shell Programming and Scripting

Need script to count specific word and iterate over number of files.

Hi Experts, I want to know the count of specific word in a file. I have almost 600+ files. So I want to loop thru each file and get the count of the specific word. Please help me on achieving this... Many thanks (2 Replies)
Discussion started by: elamurugu
2 Replies

6. Shell Programming and Scripting

averaging specific column of multiple files

Hi all, I'm needing help again on scripting. I have weekly files with 3 columns, and I need to do monthly averaging on the values on column 3, the file naming convention is as follows: 20000105.u- 2000:year 01:month 05:day 20000112.u 20000119.u 20000126.u 20000202.u 20020209.u I need to... (15 Replies)
Discussion started by: ida1215
15 Replies

7. Shell Programming and Scripting

Compare multiple files with multiple number of columns

Hi, input file1 abcd 123 198 xyz1:0909090-0909091 ghij 234 999 xyz2:987654:987655 kilo 7890 7990 xyz3:12345-12357 prem 9 112 xyz5:97-1134 input file2 abcd 123 198 xyz1:0909090-0909091 -9.122 0 abed 88 98 xyz1:98989-090808 -1.234 1.345 ghij 234 999 xyz2:987654:987655 -10.87090909 5... (5 Replies)
Discussion started by: jacobs.smith
5 Replies

8. Shell Programming and Scripting

Process a specific number of files ina list

Hello, I have a list of files that was created with, FILES='./'$FOLD'/'$FOLD'_continue/'$OPTIMIZE_ON'/'*'out.txt' I am doing a loop on this list for INPUT in $FILES do ... done but I may not want to process everything. Is there a simple way to just process the first 5,10,n, etc in... (2 Replies)
Discussion started by: LMHmedchem
2 Replies

9. Shell Programming and Scripting

Extracting specific files from multiple .tgz files

Hey, I have number of .tgz files and want to extract the file with the ending *results.txt from each one. I have tried for file in *.tgz; do tar --wildcards -zxf $file *results.txt; doneas well as list=$(ls *.tgz) for i in $list; do tar --wildcards -zxvf $i *.results.txt; done... (1 Reply)
Discussion started by: jfern
1 Replies

10. Shell Programming and Scripting

Removing carriage returns from multiple lines in multiple files of different number of columns

Hello Gurus, I have a multiple pipe separated files which have records going over multiple Lines. End of line separator is \n and records going over multiple lines have <CR> as separator. below is example from one file. 1|ABC DEF|100|10 2|PQ RS T|200|20 3| UVWXYZ|300|30 4| GHIJKL|400|40... (7 Replies)
Discussion started by: dJHa
7 Replies
ZNEW(1) 						      General Commands Manual							   ZNEW(1)

NAME
znew - recompress .Z files to .gz files SYNOPSIS
znew [ -ftv9PK] [ name.Z ... ] DESCRIPTION
Znew recompresses files from .Z (compress) format to .gz (gzip) format. If you want to recompress a file already in gzip format, rename the file to force a .Z extension then apply znew. OPTIONS
-f Force recompression from .Z to .gz format even if a .gz file already exists. -t Tests the new files before deleting originals. -v Verbose. Display the name and percentage reduction for each file compressed. -9 Use the slowest compression method (optimal compression). -P Use pipes for the conversion to reduce disk space usage. -K Keep a .Z file when it is smaller than the .gz file SEE ALSO
gzip(1), zmore(1), zdiff(1), zgrep(1), zforce(1), gzexe(1), compress(1) BUGS
Znew does not maintain the time stamp with the -P option if cpmod(1) is not available and touch(1) does not support the -r option. ZNEW(1)
All times are GMT -4. The time now is 10:31 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy