Sponsored Content
Top Forums Shell Programming and Scripting Extract File line and manipulate Post 302377477 by ghostdog74 on Friday 4th of December 2009 07:14:33 AM
Old 12-04-2009
bash shell
Code:
while read -r line
do
 set -- $line
 echo ${@:2:4}
done <"file"

 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

To manipulate a specific line

Hi, I would like to cut a specific line from a text file and then manipulate the text in that line. For eg. below is "tmp" file. ----------------- Tue 07/05/05 00:27:34.333 Tue 07/05/05 00:27:34.333 4 events were processed for customer 315 and will be correctly resolved when 315MERGE is run:... (2 Replies)
Discussion started by: dhiman.sarkar
2 Replies

2. Shell Programming and Scripting

Extract a line from a file using the line number

I have a shell script and want to assign a value to a variable. The value is the line exctrated from a file using the line number. The line number it is not fix, and could change any time. I have tried sed, awk, head .. See my script # Get randome line number from the file #selectedline = `awk... (1 Reply)
Discussion started by: zambo
1 Replies

3. Shell Programming and Scripting

extract a line from a file using the line number

Hello, I am having trouble extracting a specific line from a file when the line number is known. My first attempt involved grep -n 'hi' (the word 'hi will always be there) to get the line number before the line that I actually want (line 4). Extra Notes: -I am working in a bash script. -The... (7 Replies)
Discussion started by: grandtheftander
7 Replies

4. Shell Programming and Scripting

get the fifth line of a text file into a shell script and trim the line to extract a WORD

FOLKS , i have a text file that is generated automatically of an another korn shell script, i want to bring in the fifth line of the text file in to my korn shell script and look for a particular word in the line . Can you all share some thoughts on this one. thanks... Venu (3 Replies)
Discussion started by: venu
3 Replies

5. Shell Programming and Scripting

extract a line from a file by line number

Hi guys, does anyone know how to extract(grep) a line from the file, if I know the line number? Thanks a lot. (9 Replies)
Discussion started by: aoussenko
9 Replies

6. Shell Programming and Scripting

HELP: Shell Script to read a Log file line by line and extract Info based on KEYWORDS matching

I have a LOG file which looks like this Import started at: Mon Jul 23 02:13:01 EDT 2012 Initialization completed in 2.146 seconds. -------------------------------------------------------------------------------- -- Import summary for Import item: PolicyInformation... (8 Replies)
Discussion started by: biztank
8 Replies

7. Shell Programming and Scripting

Manipulate XML File Continous STRING by each Order Line using SHELL

heres sample File: <?xml version="1.0"?> <!DOCTYPE cXML SYSTEM "www"><cXML.............................................. <OrderRequest>USE UNIX.com</Extrinsic><Extrinsic name="UniqueName">Peter@UNIX.com</Extrinsic><Extrinsic name="ContractingEntity">UNIX... (3 Replies)
Discussion started by: Pete.kriya
3 Replies

8. Shell Programming and Scripting

Extract & Manipulate continous data stream-- tcpdump

Hello; I have this rather tricky problem to solve --(to me, anyways) .. I am processing the following one liner with tcpdump.. tcpdump -i T3501 -A ether host 00:1e:49:29:fc:c9 or ether host 00:1b:2b:86:ec:1b or ether host 00:21:1c:98:a4:08 and net 149.83.6.0/24 | grep --line-buffered -B... (5 Replies)
Discussion started by: delphys
5 Replies

9. Shell Programming and Scripting

Perl to extract information from a file line by line

In the below perl code I am using tags within each line to extract certain information. The tags that are used are: STB >0.8 is STRAND BIAS otherwise GOOD FDP is the second number GO towards the end of the line is read into an array and the value returned is outputed, in the first line that... (1 Reply)
Discussion started by: cmccabe
1 Replies

10. Shell Programming and Scripting

How to manipulate string in line?

Hello, I looked up on google but do not know from which point to start... I am under ubuntu 18 bionic and Mainfile consists of 25K lines MainFile: Test,AAEE9FED3, GGBBDD DD AA X2d Moscow 112233445566aaBBccPPdddEE Test,AAEE9FED3, GG33DD s00022 Leningrad 11298932566aaBBccPPdddEE... (8 Replies)
Discussion started by: baris35
8 Replies
shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list. Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)). FILES
/etc/shells lists shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.10 4 Jun 2001 shells(4)
All times are GMT -4. The time now is 07:21 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy