Sponsored Content
Top Forums Shell Programming and Scripting hot to specify the last column in sed? Post 302207733 by fedora on Friday 20th of June 2008 04:03:23 PM
Old 06-20-2008
the thing is the last column of the file test is special, it may have something like "aaMM", which will be YYMM after the replacement, or "aaYY", which will be YYYY after the replacement, we can not just replace YY$ back to aa here.

Quote:
Originally Posted by robotronic
With GNU sed you may try something like this:

Code:
sed "s/\baa\b/YY/g; s/YY$/aa/" input_file.txt

No better ideas... For now Smilie
 

7 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Hot Keys

I am a new user, using Unix in a DOS window. Can I set up Hot Keys to run a script? Example - A12.1.13.15 aaaaBbbbCccc Thank you, cwtlr (8 Replies)
Discussion started by: cwtlr
8 Replies

2. What is on Your Mind?

Too Hot Here

Officially, we had high of 96°F with a relative humidity of 52% here in Rockville Md today. But my car's thermometer said the outside temp was 110° when I first got in this afternoon. After driving for 30 minutes it cooled down to 103°. I actually have a nasty burn on my hand just from leaning... (19 Replies)
Discussion started by: Perderabo
19 Replies

3. 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

4. Shell Programming and Scripting

Awk or Sed, fubd match in column, then edit column.

FILE A: 9780743551526,(Abridged) 9780743551779,(Unabridged) 9780743582469,(Abridged) 9780743582483,(Unabridged) 9780743563468,(Abridged) 9780743563475,(Unabridged) FILE B: c3saCandyland 9780743518321 "CANDYLAND" "MCBAIN, ED" 2001 c3sbCandyland 9780743518321 ... (7 Replies)
Discussion started by: glev2005
7 Replies

5. Shell Programming and Scripting

awk or sed: change the color of a column w/o screwing up column spacing

Hey folks. I wrote a little awk script that summarizes /proc/net/dev info and then pipes it to the nix column command to set up column spacing appropriately. Here's some example output: Iface RxMBytes RxPackets RxErrs RxDrop TxMBytes TxPackets TxErrs TxDrop bond0 9 83830... (3 Replies)
Discussion started by: ryran
3 Replies

6. Shell Programming and Scripting

Solution for replacement of 4th column with 3rd column in a file using awk/sed preserving delimters

input "A","B","C,D","E","F" "S","T","U,V","W","X" "AA","BB","CC,DD","EEEE","FFF" required output: "A","B","C,D","C,D","F" "S", T","U,V","U,V","X" "AA","BB","CC,DD","CC,DD","FFF" tried using awk but double quotes not preserving for every field. any help to solve this is much... (5 Replies)
Discussion started by: khblts
5 Replies

7. UNIX for Beginners Questions & Answers

Awk/sed summation of one column based on some entry in first column

Hi All , I am having an input file as stated below Input file 6 ddk/djhdj/djhdj/Q 10 0.5 dhd/jdjd.djd.nd/QB 01 0.5 hdhd/jd/jd/jdj/Q 10 0.5 512 hd/hdh/gdh/Q 01 0.5 jdjd/jd/ud/j/QB 10 0.5 HD/jsj/djd/Q 01 0.5 71 hdh/jjd/dj/jd/Q 10 0.5 ... (5 Replies)
Discussion started by: kshitij
5 Replies
COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. ENVIRONMENT
The COLUMNS, LANG, LC_ALL and LC_CTYPE environment variables affect the execution of column as described in environ(7). EXIT STATUS
The column utility exits 0 on success, and >0 if an error occurs. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ; printf "HH:MM/YEAR NAME " ; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. BUGS
Input lines are limited to LINE_MAX (2048) bytes in length. BSD
July 29, 2004 BSD
All times are GMT -4. The time now is 09:22 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy