Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Assistance required to decode sed search using /1
Top Forums UNIX for Beginners Questions & Answers Assistance required to decode sed search using /1 Post 303035613 by vgersh99 on Wednesday 29th of May 2019 10:32:08 AM
Old 05-29-2019
something along these lines:
Code:
sed 's/^ *\([0-9][0-9]*\).*\(TSval.*\)/\1 \2/' myFile

1> Why does [0-9] need to be grouped into brackers?
[0-9] - signifies the character rang - in this case numbers

2> What is the purpose of \1 TSval? If /1 denotes the last element which is remembered, how does it apply here?
From man sed or man ed...
Code:
   The REPLACEMENT can contain '\N' (N being a number from 1 to 9,
inclusive) references, which refer to the portion of the match which is
contained between the Nth '\(' and its matching '\)'.  Also, the
REPLACEMENT can contain unescaped '&' characters which reference the
whole matched portion of the pattern space.

Last edited by vgersh99; 05-29-2019 at 11:43 AM..
This User Gave Thanks to vgersh99 For This Post:
sand1234
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

sed search and replace word assistance...

Hi, I am trying to write a shell script designed to take input line by line by line from a file with a word on each line for editing with sed. Example file: 1.ejverything 2.bllown 3.maikling 4.manegement 5.existjing 6.systems My design currently takes input from the user, and... (2 Replies)
Discussion started by: mkfitzwilliams
2 Replies

2. Shell Programming and Scripting

DECODE file field is required in Bash

Dear All, I want to decode the one of the file field. Input file: 9393939393|999|2009-02-20 00:00:01|2||4587|2007-02-28 00:00:01|0 9393939393|2001|2009-02-20 00:00:01|2||4587|2007-02-28 00:00:01|0 9393939393|1500|2009-02-20 00:00:01|2||4587| 2007-02-28 00:00:01|0... (1 Reply)
Discussion started by: hanu_oracle
1 Replies

3. Emergency UNIX and Linux Support

Complicated SED search required

Hi All, I'm trying to extract all the description fields from a MIB file which contain multiple instances of the following text: ENTERPRISE compaq VARIABLES { sysName, cpqHoTrapFlags, cpqSsBoxCntlrHwLocation, cpqSsBoxCntlrIndex, cpqSsBoxBusIndex,... (10 Replies)
Discussion started by: badoshi
10 Replies

4. Shell Programming and Scripting

Decode %s Special Character in Sed

Greetings, I am doing something that I don't know if it is possible... I have a file with a line looks like this: <%s \n%s / %s \n%s \n> and I am trying to replace this line with <%s \n%s \n%s / %s \n%s \n> in Shell script with sed command... StringToReplace='%s \n%s / %s \n%s \n'... (2 Replies)
Discussion started by: wasabihowdi
2 Replies

5. Shell Programming and Scripting

Logic Test Search Assistance

I need to create a logical test to see if a job is complete. I have 4 seperate jobs that will be running in tandem and will create a file indicating the job completed. Once all 4 jobs have completed I will need to execute the final job to execute the final task. The problem I am having is that... (5 Replies)
Discussion started by: NoMadBanker
5 Replies

6. UNIX for Advanced & Expert Users

Need assistance with sed

Hi All, I need your assistance, I would like to replace all lines beginning with the word "begin" with the below text: Device | IPMB0-A | IPMB0-B Board Address |Sent SentErr %Errr |Sent SentErr ... (10 Replies)
Discussion started by: Dendany83
10 Replies

7. Shell Programming and Scripting

Assistance Required - manipulating records

Hi guys, I need to do a bit of work to a file. Basically I want to run a SQL statement against each record in this file (hundreds of lines): sample input: 233333 233334 233335 233336 I want to do the following: 1. Add a some text at the beginning to prepare the SQL (3 lines) 2. Add... (7 Replies)
Discussion started by: mcclunyboy
7 Replies

8. Hardware

Assistance required when booting M3000, error shows; * MBU_A Status:Degraded; Ver:0701h; Serial:

Here is the error showing in the XCSF, can anyone recommend further diagnosis for this specific error?; XSCF> showhardconf SPARC Enterprise M3000; + Serial:PX61142029; Operator_Panel_Switch:Locked; + Power_Supply_System:Single; SCF-ID:XSCF#0; + System_Power:On;... (4 Replies)
Discussion started by: Touchpoint
4 Replies

9. Shell Programming and Scripting

Assistance required with awk and regular expressions

Hello there, I am trying to get my head around the section below of a script we use that incorporates AWK and Regular Expressions. { match($0,"The broker*");print $1,$2,$3 ":", substr($0, RSTART,RLENGTH)} I have a basic understanding of how match works, what I am struggling with is the... (2 Replies)
Discussion started by: jimbojames
2 Replies

10. Shell Programming and Scripting

sed assistance

Hello everyone. I am trying to replace sprintf(buffer, "{\"id\":1,\"method\":\"mining.update_block\",\"params\":}\n", coinid, blockhash); with sprintf(buffer, "{\"id\":1,\"method\":\"mining.update_block\",\"params\":}\n", coinid, blockhash); this is the code I was trying but is... (9 Replies)
Discussion started by: crombiecrunch
9 Replies

LEARN ABOUT LINUX

shtool-subst

SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME

       shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

       shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
       [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]

DESCRIPTION

       This command applies one or more sed(1) substitution operations to stdin or any number of files.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -n, --nop
	   No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.

       -w, --warning
	   Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
	   operations resulted in no content change on all files.

       -q, --quiet
	   Suppress warning on substitution operation resulting in no content change.

       -s, --stealth
	   Stealth operation. Preserve timestamp on file.

       -i, --interactive
	   Enter interactive mode where the user has to approve each operation.

       -b, --backup ext
	   Preserve backup of original file using file name extension ext.  Default is to overwrite the original file.

       -e, --exec cmd
	   Specify sed(1) command directly.

       -f, --file cmd-file
	   Read sed(1) command from file.

EXAMPLE

	#   shell script
	shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]

	#    RPM spec-file
	%install
	    shtool subst -v -n 
		-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' 
		-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' 
		`find . -name Makefile -print`
	    make install

HISTORY

       The GNU shtool subst command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 2001 for GNU shtool.  It was prompted
       by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.

SEE ALSO

       shtool(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-SUBST.TMP(1)
All times are GMT -4. The time now is 12:47 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy