Sponsored Content
Top Forums Shell Programming and Scripting Using awk or sed to find a pattern that has lines before and after it Post 302974217 by Don Cragun on Thursday 26th of May 2016 02:37:54 PM
Old 05-26-2016
Quote:
Originally Posted by ran_bon_78
Thanks to all for reply and my sincere apology to Scott for not showing the work.
As I mentioned you the file is pretty big and I am trying to update the source file at the same time too. I did some search and understand that sed buffer option can handle it but frankly could not understand.

Thanks
Randy
You never answered Scott's main question. Is this a homework assignment? If this is not homework, why are we restricted to "useing(sic) awk for(sic) sed"?

And, until now, you never said anything about wanting to update the file. You said you wanted to hash certain lines and did not want to hast(?) other lines. If you want to update certain strings in your file, what replacement text do you want to use? And, why do you care about "hash"ing lines you don't want to change?

How is your script supposed to determine which strings are to be replaced and what replacement text is to be used? Do you intend to hard code values into your script and edit your script every time before you run it? Will you be passing in pairs of command-line arguments specifying old and new text? Will you supply an input file that specifies old and new values? (If so, what will be used as the separator between old and new values in that file? And, what will be the name of that file (or will the name of that file be given as an operand)?)

What shell are you using?

What operating system are you using?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to awk/sed/grep lines which contains a pattern at a given position

Dear friends I am new to linux and was trying to split some files userwise in our linux server. I have a data file of 156 continuous columns named ecscr final. I want the script to redirect all the lines containing a pattern of 7 digits to separate files. I was using grep to do that,... (2 Replies)
Discussion started by: anoopvraj
2 Replies

2. Shell Programming and Scripting

sed/awk to insert multiple lines before pattern

I'm attempting to insert multiple lines before a line matching a given search pattern. These lines are generated in a separate function and can either be piped in as stdout or read from a temporary file. I've been able to insert the lines from a file after the pattern using: sed -i '/pattern/... (2 Replies)
Discussion started by: zksailor534
2 Replies

3. Shell Programming and Scripting

awk to find pattern and add lines

My file goes like this: SID_LIST_HOSTNAME_LISTENER_3 = (SID_LIST = (SID_DESC = (SID_NAME = ORA0008) (ORACLE_HOME = /opt/oracle/product/ORA0008) (ENVS = "LD_LIBRARY_PATH=/opt/oracle/product/ORA0008/lib") ) (SID_DESC = (SID_NAME = ORA0007) ... (4 Replies)
Discussion started by: jpsingh
4 Replies

4. Shell Programming and Scripting

sed/awk : how to delete lines based on IP pattern ?

Hi, I would like to delete lines in /etc/hosts on few workstations, basically I want to delete all the lines for a list of machines like this : for HOST in $(cat stations.lst |uniq) do # echo -n "$HOST" if ping -c 1 $HOST > /dev/null 2>&1 then HOSTNAME_val=`rsh $HOST "sed... (3 Replies)
Discussion started by: albator1932
3 Replies

5. Shell Programming and Scripting

How to print the lines between the pattern using awk/grep/sed?

Hi, I need a help to search a pattern and print the multiple lines between them. Input file: Tue May 29 12:30:33 EDT 2012:threadWebContainer : 357:com.travimp.hotelierlinks.abba.service.RequestHandler.requestService(String, ITICSDataSet): hotelCancelReservation request: ... (4 Replies)
Discussion started by: aroragaurav.84
4 Replies

6. Shell Programming and Scripting

Getting lines before and until next pattern in file /awk, sed

Hi, I need to get specific parts in a large file. I need to: Get a line containing an IP address, and read from there to another line saying ***SNMP-END*** So, I have the start and the end well defined, but the problem is that apparently the awk command using the -F option doesn't work... (17 Replies)
Discussion started by: ocramas
17 Replies

7. Shell Programming and Scripting

[awk] find pattern, change next two lines

Hi, hope you can help me... It seems like a straightforward problem, but I haven't had any success so far using my basic scripting and awk "skills": I need to find a pattern /VEL/ in an input file that looks like this: 1110SOL OW25489 1.907 7.816 26.338 -0.4365 0.4100 -0.0736 ... (3 Replies)
Discussion started by: origamisven
3 Replies

8. Shell Programming and Scripting

sed -- Find pattern -- print remainder -- plus lines up to pattern -- Minus pattern

The intended result should be : PDF converters 'empty line' gpdftext and pdftotext?xml version="1.0"?> xml:space="preserve"><note-content version="0.1" xmlns:/tomboy/link" xmlns:size="http://beatniksoftware.com/tomboy/size">PDF converters gpdftext and pdftotext</note-content>... (9 Replies)
Discussion started by: Klasform
9 Replies

9. UNIX for Beginners Questions & Answers

Sed/awk join lines once pattern found

Hi all OS - RHEL6.4 I have input file -f1.txt I need to search line which starts with \Start and read next line till it gets blank line and join them all. I need to trim any trailing spaces for each line.So output.txt should be.. \Start\now\fine stepwatch this space for toolsends... (7 Replies)
Discussion started by: krsnadasa
7 Replies

10. UNIX for Beginners Questions & Answers

find pattern matches in consecutive lines in certain fields-awk

I have a text file with many thousands of lines, a small sample of which looks like this: InputFile:PS002,003 D -1 5 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 6 6 -1 -1 -1 -1 0 509 0 PS002,003 PSQ 0 1 7 18 1 0 -1 1 1 3 -1 -1 ... (5 Replies)
Discussion started by: jvoot
5 Replies
IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
All times are GMT -4. The time now is 03:50 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy