Sponsored Content
Top Forums Shell Programming and Scripting Extract substring specif position and length from file line Post 302781161 by DGPickett on Friday 15th of March 2013 04:09:29 PM
Old 03-15-2013
Leading and trailing spaces are not preserved in read, but internal ones are OK:
Code:
$ echo ' a b   c d '|while read l ;do echo ">$l<";done
>a b   c d<
$
 
 
sed is happy to do this:
 
$ sed 's/^.\{9\}\(.\{4\}\).*/\1/' in_file > out_file


Last edited by DGPickett; 03-15-2013 at 05:15 PM..
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

how to extract a substring froma file

hi all, I'm really newbie on this and I need some help. how is the best way to extract a strig or substring from a each line in a file. e.g. I want to print only this ERROR=JUD+the followed numbers from one line like this one, considering the numbers change related to different errors ... (1 Reply)
Discussion started by: morena
1 Replies

2. Shell Programming and Scripting

Deleting Characters at specific position in a line if the line is certain length

I've got a file that would have lines similar to: 12345678 x.00 xx.00 x.00 xxx.00 xx.00 xx.00 xx.00 23456781 x.00 xx.00 xx.00 xx.00 xx.00 x.00 xxx.00 xx.00 xx.00 xx.00 34567812 x.00 xx.00 x.00 xxx.00 xx.00 xx.00 xx.00 45678123 x.00 xx.00 xx.00 xx.00 xx.00 x.00 xxx.00 xx.00 xx.00 xx.00 xx.00... (10 Replies)
Discussion started by: Cailet
10 Replies

3. UNIX for Dummies Questions & Answers

Extract substring of unknown length from string

I have a string: hgLogOutput=" +0000 files: forum/web/hook-test.txt /forum/web/hook-test-2.txt description: test" and I want to extract the file names from it, they will always appear between the files: and the description:. I have worked out that I can do this: "$hgLogOutput" | awk '{... (2 Replies)
Discussion started by: klogger
2 Replies

4. UNIX for Dummies Questions & Answers

Using sed to extract a substring at end of line

This is the line that I am using: sed 's/^*\({3}*$\)/\1 /' <test.txt >results.txt and suppose that test.txt contains the following lines: http://www.example.com/200904/AUS.txt http://www.example.com/200903/_RUS.txt http://www.example.com/200902/.FRA.txt What I expected to see in results.txt... (6 Replies)
Discussion started by: figaro
6 Replies

5. UNIX for Dummies Questions & Answers

To Extract words from File based on Position

Hi Guys, While I was writing one shell script , I just got struck at this point. I need to extract words from a file at some specified position and do some comparison operation and need to replace the extracted word with another word. Eg : I like Orange very much. I need to replace... (19 Replies)
Discussion started by: kuttu123
19 Replies

6. Shell Programming and Scripting

Add substring in a file containing fixed length record.

I am new to awk and writing a script using awk. I have file containing fixed length records, I wish to extract 2 substring(each substring is padded with zeros on left e.g 000000003623) and add each substring respectively for every record in the file to get total sum of respective substring for all... (5 Replies)
Discussion started by: Devesh5683
5 Replies

7. UNIX for Dummies Questions & Answers

Help with awk, where line length and field position are variable

I have several questions about using awk. I'm hoping someone could lend me a hand. (I'm also hoping that my questions make sense.) I have a file that contains pipe separated data. Each line has similar data but the number of fields and the field position on each line is variable. ... (3 Replies)
Discussion started by: Cheese64
3 Replies

8. Shell Programming and Scripting

Extract substring in a file

Hello, A question please. A have a file that contains a string. Ex: AAAABBCCCCCDDEEEEEEEEEEFF I'd want to recover 2 substrings, 'BB' and 'FF' and then leave them in a new file. Could anoyone help me please? Thanks in advance (3 Replies)
Discussion started by: nolo41
3 Replies

9. Shell Programming and Scripting

Extract a substring from a file

Hello, A question please. A have a file that contains a string. Ex: AAAABBCCCCCDDEEEEEEEEEEFF I'd want to recover 2 substrings, 'BB' and 'FF' and then leave them in a new file. From position 5, 2 caracters (ex:"BB") and from position 25, 2 caracters (ex:"FF") in a file. Could anoyone help me... (3 Replies)
Discussion started by: nolo41
3 Replies
ECHO(1) 						    BSD General Commands Manual 						   ECHO(1)

NAME
echo -- write arguments to the standard output SYNOPSIS
echo [-n] [string ...] DESCRIPTION
The echo utility writes any specified operands, separated by single blank (' ') characters and followed by a newline (' ') character, to the standard output. The following option is available: -n Do not print the trailing newline character. This may also be achieved by appending 'c' to the end of the string, as is done by iBCS2 compatible systems. Note that this option as well as the effect of 'c' are implementation-defined in IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002. Applications aiming for maximum portability are strongly encouraged to use printf(1) to sup- press the newline character. Some shells may provide a builtin echo command which is similar or identical to this utility. Most notably, the builtin echo in sh(1) does not accept the -n option. Consult the builtin(1) manual page. EXIT STATUS
The echo utility exits 0 on success, and >0 if an error occurs. SEE ALSO
builtin(1), csh(1), printf(1), sh(1) STANDARDS
The echo utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002. BSD
April 12, 2003 BSD
All times are GMT -4. The time now is 03:39 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy