Solved

VI - how to replace arbitary column(s)

Posted on 2004-10-05
2
599 Views
Last Modified: 2010-04-21
I've used vi and unix for years but I've never found a good way to do this.

I want to search and replace based on column/character number

the search part I can do by

/^......<correct number of .>...X/

given its an 'X' in the column I want but I can't do

:1,$s/^.............................X/.....................Y/

unless I want all .'s in the file
0
Comment
Question by:NickUpson
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
2 Comments
 
LVL 21

Expert Comment

by:tfewster
ID: 12226932
:1,$s/^\(....\)X/\1Y/
0
 
LVL 21

Accepted Solution

by:
tfewster earned 500 total points
ID: 12226966
The way I understand this is:
Look for X in the 5th column;  "Remember" the characters in the columns 1-4 (4 .'s) in a sed variable.
Subsitute the "pattern" found with \1Y, where \1 is the contents of the variable
0

Featured Post

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When you do backups in the Solaris Operating System, the file system must be inactive. Otherwise, the output may be inconsistent. A file system is inactive when it's unmounted or it's write-locked by the operating system. Although the fssnap utility…
Let's say you need to move the data of a file system from one partition to another. This generally involves dismounting the file system, backing it up to tapes, and restoring it to a new partition. You may also copy the file system from one place to…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question