Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Simple awk search problem
Top Forums Shell Programming and Scripting Simple awk search problem Post 302580563 by Ygor on Friday 9th of December 2011 12:44:07 AM
Old 12-09-2011
Scan though every line in the file using awk...
Code:
/reg_exp/{x=NR}
For any line that matches reg_exp, store the row number in variable "x". Note: at the end of scanning the file, variable "x" will hold the line number of the last occurance of reg_exp.
Code:
x{y[NR]=$0}
If variable "x" is not null, then store each line in array "y" using line number as the index.
Code:
END{if(x)for(z=x;z<=NR;z++)print y[z]}
At the end of the file, if reg_exp was found, print each line from array "y" starting from "x".
This User Gave Thanks to Ygor For This Post:
ni2
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Simple AWK script problem.

Hi all, I have set up a simple awk script to calculate the average of values that are printed out a number of times per second (the number of time the printing occurs varies). The data is of the format shown below: 1 4.43 1 3.65 1 2.45 2 7.65 2 8.23 2 5.65 3 4.65 3 6.21 .. .. 120... (4 Replies)
Discussion started by: omnomtac
4 Replies

2. Shell Programming and Scripting

awk gsub simple problem

Hi New to shell script and awk and need assistance on this problem. I need to use a variable to substitute a string in an external file and write the changed info to another file. At first I did not know if you could use a variable as the sub value but the following showed me that I can. ... (3 Replies)
Discussion started by: hukcjv
3 Replies

3. Shell Programming and Scripting

simple awk problem

pcn linus> ntpq -p remote refid st t when poll reach delay offset disp ============================================================================== +smpnn01 ntpsrv1 2 u 829 1024 377 1.46 0.793 0.85 *smpnn02 ntpsrv1 2 u ... (2 Replies)
Discussion started by: arch12
2 Replies

4. Shell Programming and Scripting

Search with awk problem

Hi There is one problem which i am not able to find the solution :( Suppose there are two files tmpfile1 and tmpfile2 . tmpfile1 contains data as :bash> cat tempfile1 1222 1234 1234 1234 :bash> now my code is written as getcommand="cat tmpfile2" while(getcommand | getline)... (7 Replies)
Discussion started by: aishsimplesweet
7 Replies

5. Shell Programming and Scripting

How to do a simple awk search?

Hello I am trying to do global search on access log files for a date and for either 'Error|error' string ls -lrt *access* | grep "Sep 23" | awk '{print $9}'|xargs awk '/23\/Sep\/2011/ && /Error/ || /error' Above matches All lines with 'error' as well unfortunately. Is there a... (6 Replies)
Discussion started by: delphys
6 Replies

6. Shell Programming and Scripting

simple awk problem

Hello; I have the following log file: 10/11/11 10:42:02 LOCK Q Userid:284 Username=root UserPID:23158 Device:marlin batch 10/11/11 10:42:02 TableNr:226 TableName:iatkn RecId:116290398 Flags:X Q H 10/11/11 10:42:02 LOCK CONTENTION X 10/11/11 10:42:02 ... (3 Replies)
Discussion started by: delphys
3 Replies

7. Shell Programming and Scripting

Simple awk problem II

Hello; Trying to figure out how to keep just the contents between the two search lines: awk '/regexp_1/ ,/regexp_2/' I do not want lines containing regexp_1 and regexp_2 in the output. Thank you for any ideas Video tutorial on how to use code tags in The UNIX and Linux Forums. (5 Replies)
Discussion started by: delphys
5 Replies

8. Shell Programming and Scripting

another simple awk problem

Hello; I need to print two previous lines after searching for a reg exp: awk '/haywood/' should produce the following =================== p9J46THe020804 89922 Tue Oct 18 21:06 MAILER-DAEMON (host map: lookup (haywood.com): deferred) ... (1 Reply)
Discussion started by: delphys
1 Replies

9. Shell Programming and Scripting

simple awk sort problem

Hello folks I have the following output UNIX95=1 ps -ef -o pcpu,user,pid,args |more %CPU USER PID COMMAND 0.03 root 0 swapper 0.08 root 1 init 0.00 root 13 net_str_cached 0.00 root 12 usbhubd 0.00 root 11 escsid 0.00 root 10... (3 Replies)
Discussion started by: delphys
3 Replies

10. Shell Programming and Scripting

Problem passing a search pattern to AWK inside a script loop

Learning, stumbling! My progress in shell scripting is slow. Now I have this doubt: I have the following file (users.txt): AU0909,on AU0309,off AU0209,on AU0109,off And this file (userson.txt) AU0909 AU0209 AU0109 AU0309 I just want to set those users on userson.txt to "off" in... (14 Replies)
Discussion started by: quinestor
14 Replies

LEARN ABOUT CENTOS

paps

PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME

       paps - UTF-8 to PostScript converter using Pango

SYNOPSIS

       paps [options] files...

DESCRIPTION

       paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
       through the pango ft2 backend.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.

       --landscape
	      Landscape output. Default is portrait.

       --columns=cl
	      Number of columns output. Default is 1.

       --font=desc
	      Set the font description. Default is Monospace 12.

       --rtl  Do rtl layout.

       --paper ps
	      Choose paper size. Known paper sizes are legal, letter, a4. Default is A4.

       --bottom-margin=bm
	      Set bottom margin in postscript points (1/72 inch). Default is 36.

       --top-margin=tm
	      Set top margin. Default is 36.

       --left-margin=lm
	      Set left margin. Default is 36.

       --right-margin=rm
	      Set right margin. Default is 36.

       --help Show summary of options.

       --header
	      Draw page header for each page.

       --markup
	      Interpret the text as pango markup.

       --encoding=ENCODING
	      Assume the documentation encoding is ENCODING.

       --lpi  Set the lines per inch. This determines the line spacing.

       --cpi  Set the characters per inch. This is an alternative method of specifying the font size.

       --stretch-chars
	      Indicates  that  characters  should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
	      behaviour.

AUTHOR

       paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								  April  17, 2006							   PAPS(1)
All times are GMT -4. The time now is 05:02 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy