Sponsored Content
Top Forums Shell Programming and Scripting Failure using regex with awk in 'while read file' loop Post 302940577 by pathunkathunk on Tuesday 7th of April 2015 10:18:22 AM
Old 04-07-2015
Do I have this basically right?
Code:
{
    A[$1]; # Build array on the first column of the file
    next  # Skip all proceeding blocks and process next line
}
$3 in A # Check in the value in column one of the second files is in the array
{
    # If so print it it to file named based on $3
print > sprintf("%s.txt",$3) 
}

If so, how can I adapt this code to give me only a random subset of matched lines for each array value? Is there a way to redirect the match specified by $3 in A to gshuf -n 2 before printing?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Read from a file and use the strings in a loop

Hello all, I need some help to create a script which contain a few strings on every line, and use those strings in a loop to fire some commands. for exmaple the file looks like tom dave bill andy paul I want to read one line at a time and use it in loop like command tom command dave... (3 Replies)
Discussion started by: xboxer21
3 Replies

2. UNIX for Dummies Questions & Answers

How to read a file in unix using do....done loop

Hi , can some give me idea about how to use do...done while loop in UNIX to read the contents of a file.. (2 Replies)
Discussion started by: sreenusola
2 Replies

3. Shell Programming and Scripting

How to Read the entire file using while loop

Guys, I am trying to read the whole file using while loop but when i run the ssh part of the script it reads only the first line and exit after that. There are in total 134 lines in the file, but when the output is redirected, it does only for one line and comes to command prompt. pls help..... (11 Replies)
Discussion started by: sdosanjh
11 Replies

4. SCO

file system not getting mounted in read write mode after system power failure

After System power get failed File system is not getting mounted in read- write mode (1 Reply)
Discussion started by: gtkpmbpl
1 Replies

5. Shell Programming and Scripting

IF awk in a while read line-loop

Hi As a newbe in scripting, i struggle hard with my first script. What i want to do is, bringing data of two files together. file1: .... 05/14/12-04:00:00 41253 4259 5135 5604 5812 5372 05/14/12-04:10:00 53408 5501 6592 7402 7354 6639 05/14/12-04:20:00 58748 6037 7292 8223... (13 Replies)
Discussion started by: IMPe
13 Replies

6. UNIX for Dummies Questions & Answers

read regex from ID file, print regex and line below from source file

I have a file of protein sequences with headers (my source file). Based on a list of IDs (which are included in some of the headers), I'd like to print out only the specified sequences, with only the ID as header. In other words, I'd like to search source.txt for the terms in IDs.txt, and print... (3 Replies)
Discussion started by: pathunkathunk
3 Replies

7. Shell Programming and Scripting

Using awk instead of while loop to read file

Hello, I have a huge file, I am currently using while loop to read and do some calculation on it, but it is taking a lot of time. I want to use AWK to read and do those calculations. Please suggest. currently doing: cat input2 | while read var1 do num=`echo $var1 | awk... (6 Replies)
Discussion started by: anand2308
6 Replies

8. Shell Programming and Scripting

For loop inside awk to read and print contents of files

Hello, I have a set of files Xfile0001 - Xfile0021, and the content of this files (one at a time) needs to be printed between some line (lines start with word "Generated") that I am extracting from another file called file7.txt and all the output goes into output.txt. First I tried creating a for... (5 Replies)
Discussion started by: jaldo0805
5 Replies

9. Shell Programming and Scripting

Use while loop to read file and use ${file} for both filename input into awk and as string to print

I have files named with different prefixes. From each I want to extract the first line containing a specific string, and then print that line along with the prefix. I've tried to do this with a while loop, but instead of printing the prefix I print the first line of the file twice. Files:... (3 Replies)
Discussion started by: pathunkathunk
3 Replies

10. Shell Programming and Scripting

Failure: if grep "$Var" "$line" inside while read line loop

Hi everybody, I am new at Unix/Bourne shell scripting and with my youngest experiences, I will not become very old with it :o My code: #!/bin/sh set -e set -u export IFS= optl="Optl" LOCSTORCLI="/opt/lsi/storcli/storcli" ($LOCSTORCLI /c0 /vall show | grep RAID | cut -d " "... (5 Replies)
Discussion started by: Subsonic66
5 Replies
PR(1)							      General Commands Manual							     PR(1)

NAME
pr - print file SYNOPSIS
pr [ option ] ... [ file ] ... DESCRIPTION
Pr produces a printed listing of one or more files. The output is separated into pages headed by a date, the name of the file or a speci- fied header, and the page number. If there are no file arguments, pr prints its standard input. Options apply to all following files but may be reset between files: -n Produce n-column output. +n Begin printing with page n. -h Take the next argument as a page header. -wn For purposes of multi-column output, take the width of the page to be n characters instead of the default 72. -f Use formfeeds instead of newlines to separate pages. A formfeed is assumed to use up two blank lines at the top of a page. (Thus this option does not affect the effective page length.) -ln Take the length of the page to be n lines instead of the default 66. -t Do not print the 5-line header or the 5-line trailer normally supplied for each page. -sc Separate columns by the single character c instead of by the appropriate amount of white space. A missing c is taken to be a tab. -m Print all files simultaneously, each in one column, Inter-terminal messages via write(1) are forbidden during a pr. FILES
/dev/tty? to suspend messages. SEE ALSO
cat(1) DIAGNOSTICS
There are no diagnostics when pr is printing on a terminal. 4th Berkeley Distribution April 29, 1985 PR(1)
All times are GMT -4. The time now is 04:47 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy