Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Replace x Number of String Occurrence with Sed
Top Forums Shell Programming and Scripting Replace x Number of String Occurrence with Sed Post 302486843 by SkySmart on Monday 10th of January 2011 12:06:49 PM
Old 01-10-2011
Quote:
Originally Posted by panyam
As suggested by DGPickett , you can use sed.

To get the line number of the 250th occurance:

Code:
 
line_num=`awk '/string to search/ {c++; if (c>=250) {c=NR;exit}}END {print c}' input_file`

then you can use $line_num value.

Code:
 
sed  "$line_num,$ s/string to search/string to replace/g" input_file

This doesn't seem to be what i want.

ok, the file that needs to be edited is services.cfg.

if i did a grep -c "use five-minute-interval" on that file right now, i would get about 590 lines that have those strings.

but, i want to cut that 590 to half by replacing half of the "five-minute-interval" with "four-minute-interval".

there has to be a way for me to be able to automatically replace the first number of occurrences of a string with another string.

I tried the below but it didn't work. I also tried what you suggested, but it didn't replace the bottom 250 occurrences of the specified strings. Smilie

Code:
sed 's/use five-minute-interval/use four-minute-interval/250' services.cfg

 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Search and replace to first occurrence of string

Hi all, I have a very large; delimited file. In vi I would like to replace: CSACT_DY;AVG_UEACT1;uesPerActiveLinkSetSize_1;#;A CSACT_DY;AVG_UEACT2;uesPerActiveLinkSetSize_2;#;A CSACT_DY;AVG_UEACT3;uesPerActiveLinkSetSize_3;#;A with: CSACT_DY;AVG_UEACT1;Average... (7 Replies)
Discussion started by: gilmord
7 Replies

2. Shell Programming and Scripting

SED replace string by occurrence

hi all, I have a text file with following content PAGENUMBER asasasa asasasa PAGENUMBER sasasasasa PAGENUMBER using sed i want to replace PAGENUMBER by occurrence count eg 1 asasasa asasasa 2 sasasasasa 3 (4 Replies)
Discussion started by: uttamhoode
4 Replies

3. Shell Programming and Scripting

Sed to print a string until the second occurrence of a character

Hi, I am totally new to shell scripting. I have a String "c:\working\html\index.txt.12-12-2009.bkp" I want to check if the string has more than one "." character. If it does I would like to retrieve only "c:\working\html\index.txt" i.e, discard the second occurrence of "." and the rest of the... (7 Replies)
Discussion started by: imr
7 Replies

4. UNIX for Dummies Questions & Answers

Sed to replace second number in a random string

I need a sed line that will take STDM111 and change it to STDM161 the STDM will always be constant but the 3 numbers after will be random, I just need it to always replace the middle number with 6 regardless of what the numbers are. (8 Replies)
Discussion started by: glev2005
8 Replies

5. Shell Programming and Scripting

SED to replace exact match, not first occurrence.

Lets say I have file.txt: (Product:Price:QuantityAvailable) (: as delimiter) Chocolate:5:5 Banana:33:3 I am doing a edit/update function. I want to change the Quantity Available, so I tried using the SED command to replace 5, but my Price which is also 5 is changed instead. (for the Banana... (13 Replies)
Discussion started by: andylbh
13 Replies

6. Shell Programming and Scripting

find string nth occurrence in file and print line number

Hi I have requirement to find nth occurrence in a file and capture data from with in lines (between lines) Data in File. <QUOTE> <SESSION> <ATTRIBUTE NAME='Parameter Filename' VALUE='file1.parm'/> <ATTRIBUTE NAME='Service Name' VALUE='None'/> </SESSION> <SESSION> <ATTRIBUTE... (6 Replies)
Discussion started by: tmalik79
6 Replies

7. Shell Programming and Scripting

Sed diffrent replace by occurrence

I couldn't find the answer anywhere, so I hope you could help me. I need to change something like the following: something/bla/aaaa anything/bbb to: something --bla ----aaaa anything --bbb How do I do this? Is it possible with sed? I tried various patterns, but don't know how to... (5 Replies)
Discussion started by: Patwan
5 Replies

8. Shell Programming and Scripting

Count number of occurrence of a string in file

if there's a file containing: money king money queen money cat money also money king all those strings are on one line in the file. how can i find out how many times "money king" shows up in the line? egrep -c "money king" wont work. (7 Replies)
Discussion started by: SkySmart
7 Replies

9. AIX

Replace consecutive occurrence of string in same line

Hi All, I have a requirement to replace consecutive occurence of same string nedd to be replaced. Below is the input and desired output. Input: --------- 123.5|ABC|.|.|. 234.4|DEF|.|.|.|.|.| Output: --------- 123.5|ABC|||. 234.4|DEF||||| so basically "|.|" need to be replaced with... (9 Replies)
Discussion started by: ureddy
9 Replies

10. Shell Programming and Scripting

Replace first occurrence of a string in while loop

####Solved#### Hello, My aim is to replace searched string with incremented value under ubuntu 16.04. Example: aasasasas 9030 31wwo weopwoep weerasas 9030 ew31wo ieopwoep bbqqqsas 9030 ew3swo ieeopwoep ccsaqpas 9030 ewiro o2opwoep Expected: aasasasas 9030 31wwo weopwoep weerasas 9031... (2 Replies)
Discussion started by: baris35
2 Replies

LEARN ABOUT CENTOS

locale::codes::langvar

Locale::Codes::LangVar(3)				User Contributed Perl Documentation				 Locale::Codes::LangVar(3)

NAME

       Locale::Codes::LangVar - standard codes for language variation identification

SYNOPSIS

	  use Locale::Codes::LangVar;

	  $lvar = code2langvar('acm');		       # $lvar gets 'Mesopotamian Arabic'
	  $code = langvar2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langvar_codes();
	  @names   = all_langvar_names();

DESCRIPTION

       The "Locale::Codes::LangVar" module provides access to standard codes used for identifying language variations, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language variations. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lvar = code2langvar('arevela','alpha');
	  $lvar = code2langvar('arevela',LOCALE_LANGVAR_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of alphanumeric codes from the IANA language registry, such as 'arevela' for Eastern Armenian.

	   This code set is identified with the symbol "LOCALE_LANGVAR_ALPHA".

	   This is the default code set.

ROUTINES

       code2langvar ( CODE [,CODESET] )
       langvar2code ( NAME [,CODESET] )
       langvar_code2code ( CODE ,CODESET ,CODESET2 )
       all_langvar_codes ( [CODESET] )
       all_langvar_names ( [CODESET] )
       Locale::Codes::LangVar::rename_langvar  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangVar::add_langvar  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangVar::delete_langvar  ( CODE [,CODESET] )
       Locale::Codes::LangVar::add_langvar_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangVar::delete_langvar_alias  ( NAME )
       Locale::Codes::LangVar::rename_langvar_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangVar::add_langvar_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangVar::delete_langvar_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2013-04-12						 Locale::Codes::LangVar(3)
All times are GMT -4. The time now is 05:06 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy