Solved

Sed sees ip-adres as regular expression.

Posted on 2006-06-11
5
401 Views
Last Modified: 2013-12-26
Hi,

I have a question concerning sed and regular expressions for tru64 unix.

I have a script that will change the ip address in a number of configuration files.  In the script, I use sed to change the ip-adresses.

for x in $config_files ;do
        cp -pr $x $x.temp
        cat $x.temp |sed "s|$old_ip|$new_ip|">$x
done

For most ip adresses, this worked just fine.  Now I need to change 10.255.2.5 into 10.255.2.195, which is giving problems.  Apparently, sed sees the . in the ip-adres as a part of a regular expression and is replacing all ip adresses that match this regular expression.

Is there any way to avoid that sed sees this as a regular expression ?  If not, how can I create a new variable $esc_old_ip that has the esc character before the dot ?

I tried already

esc_old_ip=`echo $old_ip | awk -F "." '{printf $1}';printf "\\\.";echo $old_ip | awk -F "." '{printf $2}';printf "\\\.";echo $old_ip | awk -F "." '{printf $3}';printf "\\\.";echo $old_ip | awk -F "." '{print $4}'`

This line give 10\255\2\5 iso the wanted 10\.255\.2\.5

Hope that anybody can help me urgently.

Kind regards,
Carembeu
0
Comment
Question by:Carembeu
[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
  • 3
5 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 16882782
perl -i -e 's|\Q$old_ip\E|$new_ip|g' $config_files


0
 
LVL 84

Expert Comment

by:ozo
ID: 16882852
or
esc_old_ip=`echo $old_ip | sed "s|\.|\\\\\\.|g"`
0
 
LVL 84

Accepted Solution

by:
ozo earned 500 total points
ID: 16882870
sorry
perl -i -pe 's|\Q$old_ip\E|$new_ip|g' $config_files
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Introduction: Ownerdraw of the grid button.  A singleton class implentation and usage. Continuing from the fifth article about sudoku.   Open the project in visual studio. Go to the class view – CGridButton should be visible as a class.  R…
Introduction: Hints for the grid button.  Nested classes, templated collections.  Squash that darned bug! Continuing from the sixth article about sudoku.   Open the project in visual studio. First we will finish with the SUD_SETVALUE messa…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…

690 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