Sponsored Content
Top Forums Shell Programming and Scripting Extracting specified line from a file using awk Post 302080072 by jim mcnamara on Saturday 15th of July 2006 11:47:18 AM
Old 07-15-2006
Code:
awk ' {
        if (NR==1){
            if( $1 ~ /^[A-Za-z0-9]/) {print $0}
        }
}' file1

If I understand what you want. ^[stuff] means match this at the start of the line
or
Code:
sed '1q' file1 | grep '^[a-zA-Z0-9]'

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

AWK - Extracting matched line

Hi all, I have one more query related to AWK. I have the following csv data: ,qwertyA, field1, field2, field3, field4, field5, field6 ,,,,,,,,,,,,,,,,,,,100,200 ,,,,,,,,,,,,,,,,,,,300,400 ,qwertyB, field1, field2, field3, field4, field5, field6 ,,,,,,,,,,,,,,,,,,,100,200... (9 Replies)
Discussion started by: not4google
9 Replies

2. Shell Programming and Scripting

Extracting a line in a text file

If my file looks like this…. 10 20 30 and I want to take each line individually and put it in a variable so it can be read later in it's on individual test statement, how can I do that? I guess what I'm asking is how can I extract each line individually. Thanks (5 Replies)
Discussion started by: terryporter51
5 Replies

3. UNIX for Dummies Questions & Answers

Help: Sorting and extracting a line from a file

I was proposed with the following problem: The file 'numbers' contains a list of numbers. Write a command to place the largest one of those numbers in the file 'largest' (there should be nothing else in that file). Do not use the 'head' command in your answer. I think if i used the sort... (1 Reply)
Discussion started by: stava
1 Replies

4. Shell Programming and Scripting

Extracting line from a file

Hi, I would like to extract a certain portion of sentences from a particular sentence i.e. to extract the last section embrace by input output Please advice. Cheers (6 Replies)
Discussion started by: dwgi32
6 Replies

5. Shell Programming and Scripting

Extracting a column from a file and merging with other file using awk

Hi All: I have following files: File 1: <header> text... text .. text .. text .. <\header> x y z ... File 2: <header> text... text .. text .. (4 Replies)
Discussion started by: mrn006
4 Replies

6. Shell Programming and Scripting

extracting line numbers from a file and redirecting them to another file

i have applied the following command on a file named unix.txt that contains the string "linux from the text" grep -n -i -w "linux from the text" unix.txt and the result is 5:Today's Linux from the text systems are split into various branches, developed over time by AT&T as well as various... (5 Replies)
Discussion started by: arindamlive
5 Replies

7. Shell Programming and Scripting

error while extracting a line from a file based on identifier

here is the content of input file CREATE TABLE `bla bla bla` ( `allianceSiteId` int(11) DEFAULT NULL, `trunkGroupsId` int(11) DEFAULT NULL, `lastModified` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, UNIQUE KEY `allianceSiteId`... (4 Replies)
Discussion started by: vivek d r
4 Replies

8. Shell Programming and Scripting

AWK - Extracting substr and using it on the same line

Hey, I'm new to the forums. I've searched around and found some great help on how to work with sub-strings but I'm having problems extracting a substr and then using it on the line it was extracted from :wall: I have a text file full of a varying amount of tables (each with the same number of... (7 Replies)
Discussion started by: pyro214
7 Replies

9. UNIX for Dummies Questions & Answers

Extracting line1 from a file with certain file pattern in line 7

Hello there, I am new to unix and would like to do the following, hoping someone would give some guide, thanks in advance. Lets say i have a file like this: A w x y w x 0.1 B w x y w x 0.3 C w x y w x 0.7 D w x y w x 0.9 E w x y w x 0.2 So i would like to extract line 1 data where line... (2 Replies)
Discussion started by: seiksoon
2 Replies

10. UNIX for Dummies Questions & Answers

problem with extracting line in file

My file looks like this and i need to only extract those with PDT_AP21_B and output it to another file. Can anyone help? Thanks. PDT_AP21_R,,, 11 TYS,,,,T17D1207230742TYO***T17DS,,C PDT_AP21_L,,,9631166650001 ,,,,T17D1207230903TYOTYST17DS ,,C... (3 Replies)
Discussion started by: Alyssa
3 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). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)
All times are GMT -4. The time now is 09:33 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy