Sponsored Content
Top Forums Shell Programming and Scripting Replace a column with a value by ignoring the header lines Post 302785277 by anbu23 on Monday 25th of March 2013 07:38:27 AM
Old 03-25-2013
Code:
$ cat file
< Aravind, 33, chennai, 09091980, , , , , , , surfing>
< Swapnil, 32, bhopal, 01121981, , , , , , , cricket>
$ awk '{sub(".{8}","********",$5)}1' file
< Aravind, 33, chennai, ********, , , , , , , surfing>
< Swapnil, 32, bhopal, ********, , , , , , , cricket>

Code:
$ cat file
< Aravind,33,chennai,09091980, , , , , , , surfing>
< Swapnil,32,bhopal,01121981, , , , , , , cricket>
$ awk -F"," -v OFS="," '{sub(".{8}","********",$4)}1' file
< Aravind,33,chennai,********, , , , , , , surfing>
< Swapnil,32,bhopal,********, , , , , , , cricket>

Redirect the output of awk to same file and then gzip it.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to count lines - ignoring blank lines and commented lines

What is the command to count lines in a files, but ignore blank lines and commented lines? I have a file with 4 sections in it, and I want each section to be counted, not including the blank lines and comments... and then totalled at the end. Here is an example of what I would like my... (6 Replies)
Discussion started by: kthatch
6 Replies

2. Shell Programming and Scripting

awk/sed column replace using column header - help

$ cat log.txt Name Age Sex Lcation nfld alias xsd CC 25 M XYZ asx KK Y BB 21 F XAS awe SS N SD 21 M AQW rty SD A How can I replace the column with header "Lcation" with the column with header "alias" and delete the "alias" column? so that the final output will become: Name Age Sex... (10 Replies)
Discussion started by: jkl_jkl
10 Replies

3. UNIX for Dummies Questions & Answers

deleteing duplicate lines sing uniq while ignoring a column

I have a data set that has 4 columns, I want to know if I can delete duplicate lines while ignoring one of the columns, for example 10 chr1 ASF 30 15 chr1 ASF 20 5 chr1 ASF 30 6 chr2 EBC 15 4 chr2 EBC 30 ... I want to know if I can delete duplicate lines while ignoring column 1, so the... (5 Replies)
Discussion started by: japaneseguitars
5 Replies

4. Shell Programming and Scripting

Rename a header column by adding another column entry to the header column name URGENT!!

Hi All, I have a file example.csv which looks like this GrpID,TargetID,Signal,Avg_Num CSCH74_1_1,2007,61,256 CSCH74_1_1,212007,647,679 CSCH74_1_1,12007,3,32 CSCH74_1_1,207,299,777 I want the output as GrpID,TragetID,Signal-CSCH74_1_1,Avg_Num CSCH74_1_1,2007,61,256... (4 Replies)
Discussion started by: Vavad
4 Replies

5. UNIX for Dummies Questions & Answers

Rename a header column by adding another column entry to the header column name

Hi All, I have a file example.csv which looks like this GrpID,TargetID,Signal,Avg_Num CSCH74_1_1,2007,61,256 CSCH74_1_1,212007,647,679 CSCH74_1_1,12007,3,32 CSCH74_1_1,207,299,777 I want the output as GrpID,TragetID,Signal-CSCH74_1_1,Avg_Num CSCH74_1_1,2007,61,256... (1 Reply)
Discussion started by: Vavad
1 Replies

6. UNIX for Dummies Questions & Answers

Merge all csv files in one folder considering only 1 header row and ignoring header of all others

Friends, I need help with the following in UNIX. Merge all csv files in one folder considering only 1 header row and ignoring header of all other files. FYI - All files are in same format and contains same headers. Thank you (4 Replies)
Discussion started by: Shiny_Roy
4 Replies

7. Shell Programming and Scripting

Add column header and row header

Hi, I have an input like this 1 2 3 4 2 3 4 5 4 5 6 7 I would like to count the no. of columns and print a header with a prefix "Col". I would also like to count the no. of rows and print as first column with each line number with a prefix "Row" So, my output would be ... (2 Replies)
Discussion started by: jacobs.smith
2 Replies

8. Shell Programming and Scripting

Sum of a column as new column based on header in a script

Hello, I am trying to store sum of a column as a new column inside a file but have to find the column names dynamically I/p c1,c2,c3,c4,c5 10,20,30,40,50 20,30,40,50,60 If i want to find sum only column c1, c3 and output it as c6,c7 O/p c1,c2,c3,c4,c5,c6,c7 10,20,30,40,50,30,70... (6 Replies)
Discussion started by: mkathi
6 Replies

9. UNIX for Beginners Questions & Answers

awk script to extract a column, replace one of the header and replace year(from ddmmyy to yyyy)

I have a csv which has lot of columns . I was looking for an awk script which would extract a column twice. for the first occurance the header and data needs to be intact but for the second occurance i want to replace the header name since it a duplicate and extract year value which is in ddmmyy... (10 Replies)
Discussion started by: Kunalcurious
10 Replies

10. Shell Programming and Scripting

Find header in a text file and prepend it to all lines until another header is found

I've been struggling with this one for quite a while and cannot seem to find a solution for this find/replace scenario. Perhaps I'm getting rusty. I have a file that contains a number of metrics (exactly 3 fields per line) from a few appliances that are collected in parallel. To identify the... (3 Replies)
Discussion started by: verdepollo
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). Free Software Foundation Nov 3 1999 IGAWK(1)
All times are GMT -4. The time now is 06:37 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy