Sponsored Content
Full Discussion: Lines with comma
Top Forums Shell Programming and Scripting Lines with comma Post 303043558 by MadeInGermany on Friday 31st of January 2020 12:01:15 PM
Old 01-31-2020
Quote:
Originally Posted by zouhair
Code:
grep ^, a.txt

^ beginning of the line
, a comma
So it prints all lines that start with a , i.e. if the 1st field is empty.
Perhaps you want to only print if all fields are empty?
BTW it is better to put the RegularExpression string in quotes, in order to avoid unwanted substitiutions from the shell : '^,'
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Joining three lines with comma separation

I have a file that looks like this: G. KRESSLAR 9618 W. APPALOOSA DRIVE SUN CITY, AZ 85373 SHIRLEY ALLEN 7272 W. VIA MONTOYA DRIVE GLENDALE, AZ 85310 LOUIS VALDEZ 244441 N. 86TH AVENUE PEORIA, AZ 85383 DONNA NEWBON 3231 W. DENTON #D PHOENIX, AZ 85017 SARAH WILSON 6534 W. PALO... (3 Replies)
Discussion started by: BCarlson
3 Replies

2. Shell Programming and Scripting

Place a comma on lines

Is it possible to place a comma in the desired places, like 10spaces after or 15 spaces after, irrespective of the contents??? Ex:File: TEST TEST: vimalthomaswants to place a comma can he do it in the desired places? as per the above file, i need to place a comma after 10th space... (4 Replies)
Discussion started by: vj8436
4 Replies

3. Shell Programming and Scripting

Script to Check & Edit Content of a file (Addition of comma in each lines of code)

Hi all, I need to write an automated bash shell script which performs such operations: 1. Grep the header of everyline with the initial of "T" in "FILE_A" 2. Perform a for loop, Count the numbers of comma in the line of code, if (no. of comma < 17) ADD the comma until 17; ... (2 Replies)
Discussion started by: big_nutz
2 Replies

4. UNIX for Dummies Questions & Answers

sort comma separated lines by specific columns

Hello, I have a file which lines' words are comma separated: aa, bb, cc, uu b, ee, ff bb, cc, zz, ee, ss, kk oo, bb, hh, uu a, xx, ww tt, aa, dd, yy aa, gg I want to sort first by second column and in case of tie by fourth column with sort command. So the output would be: ... (4 Replies)
Discussion started by: asanchez
4 Replies

5. Shell Programming and Scripting

Make multiple lines into single quoted comma separated Linux

Hi, I want to change a file file1.txt: 1234 3456 2345 6789 3456 2333 4444 As, file2.txt in Linux: '1234','3456','2345','6789','3456','2333','4444' Could someone please help me. (Single liner sed, awk will be welcome!) (7 Replies)
Discussion started by: wiweq05
7 Replies

6. Shell Programming and Scripting

Combining multiple block of lines in one comma separated line

Hi Everyone, On my Linux box I have a text file having block of few lines and this block lines separated by one blank line. I would like to format and print these lines in such a way that this entire block of lines will come as single comma separated line & again next block of lines in next... (7 Replies)
Discussion started by: gr8_usk
7 Replies

7. UNIX for Dummies Questions & Answers

How to convert a comma delimited string to records or lines of text?

Hi, I am not sure if I've posted this question before. Anyway, I previously asked about converting lines of text into a comma delimited string. Now I am needing to do the other way around ... :( :o Can anyone advise how is this possible? Example as below: Converting records/lines to... (2 Replies)
Discussion started by: newbie_01
2 Replies

8. Shell Programming and Scripting

Comma separated values to individual lines

My OS : RHEL 6.7 I have a text file with comma separated values like below $ cat testString.txt 'JOHN' , 'KEITH' , 'NEWMAN' , 'URSULA' , 'ARIANNA' , 'CHENG', . . . . I want these values to appear like below 'JOHN' , 'KEITH' , 'NEWMAN' , 'URSULA' , 'ARIANNA' , 'CHENG', .... (4 Replies)
Discussion started by: kraljic
4 Replies

9. Shell Programming and Scripting

awk to parse comma separated field and removing comma in between number and double quotes

Hi Experts, Please support I have below data in file in comma seperated, but 4th column is containing comma in between numbers, bcz of which when i tried to parse the file the column 6th value(5049641141) is being removed from the file and value(222.82) in column 5 becoming value of column6. ... (3 Replies)
Discussion started by: as7951
3 Replies

10. UNIX for Beginners Questions & Answers

Need help on an old post - How to convert a comma delimited string to records or lines of text?

Hi, Apologies in advance to the moderator if I am posting this the wrong way. I've searched and found the solution to an old post but as it is a very old post, I don't see an option to update it with additional question. The question I have is in relation to the following post: How to... (6 Replies)
Discussion started by: newbie_01
6 Replies
NDSELECT(1)							   User Commands						       NDSELECT(1)

NAME
ndselect - select lines and fields for numdiff DESCRIPTION
Usage: ndselect -h|--help|-v|--version or ndselect [-b N][-e N][-s N][-F N][-L N][-I N][-S IFS][-x][-l PATH][-o PATH] [FILE] Print to standard output a subset of lines and fields from a given file. The argument after the options is the name of the file to read from. The complete path of the file should be given, a directory name is not accepted. If no input file is specified, the program reads from the standard input. Exit status: 0 in case of normal termination, -1 (255) in case of error -b, --beginning, --start=N Set to N the number of the first line to print (The default behavior is to start with line number 1) -e, --end=N Set to N the number of the last line that can be printed (The default behavior is to arrive till to the end of the file) -s, --step=N Set to N the increment to use when selecting the lines to print (The default value for the increment is 1) -F, --first-field=N Set to N the number of the first field to print (The default behavior is to start with field number 1) -L, --last-field=N Set to N the number of the last field that can be printed (The default behavior is to arrive till to the end of every line) -I, --increment=N Set to N the increment to use when selecting the fields to print (The default value for the increment is 1) -S, --separator=IFS Specify the set of characters to use to split the input lines into fields (The default set of characters is space, tab and newline). -x, --omit-empty-lines Do not print empty lines -l, --warnings-to=PATH Redirect warning and error messages from stderr to the indicated file -o, --output=PATH Redirect output from stdout to the indicated file -h, --help Show this help message -v, --version Show version number, Copyright, Distribution Terms and NO-Warranty COPYRIGHT
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Ivano Primi <ivprimi@libero.it> License GPLv3+: GNU GPL version 3 or later, see <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for ndselect is maintained as a Texinfo manual. If the info and ndselect programs are properly installed at your site, the command info numdiff should give you access to the complete manual. ndselect 5.6.0 January 2012 NDSELECT(1)
All times are GMT -4. The time now is 08:33 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy