Re: Using sed to find and replace ip address

[Chris Pando <chris.pando@xxxxxxxxx>]

I'm not sure what happens when your from file and to file are the
same, and I think your from file needs a less than sign in front of
it:

sed 's|x|y|' <from.txt >to.txt

sed is a really powerful tool; I've been in this field 40 years, but
didn't get into regular expressions until our Linux guy quit. Now I
can write regular expressions that look like modem line noise.

Chris
chris@xxxxxxxxx
www.brilligware.com - The home of MineSweeper5250

On Fri, Nov 13, 2020 at 4:31 PM Dean Eshleman
<Dean.Eshleman@xxxxxxxxxxxx> wrote:
> Thanks Chris and Kevin.  I made it a little further.  My problem was the missing / after the last 109.  It now runs successfully, but I end up with an empty file.  Here is the command I ran.  I did try it using [] around the periods as well, but that didn't make a difference.  I also tried adding "g" at the end, but that didn't help either.  I'm probably doing something silly.  I double checked the name of the file I'm testing with.
>
> STRQSH CMD('sed "s/10\.2\.0\.109/10.202.0.109/" /home/jdeane/httpd_dr.conf > /home/jdeane/httpd_dr.conf')
>
> Here are the first few lines of the configuration file.
>
> # Configuration originally created by Create HTTP Server wizard on Thu Jan 18 15:55:35 EST 2018
> Listen 10.2.0.109:8700
> DocumentRoot /www/websvc_prd/htdocs
> TraceEnable Off
> Options -ExecCGI -FollowSymLinks -SymLinksIfOwnerMatch -Includes -IncludesNoExec -Indexes -MultiViews
> LogFormat "%h %T %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
> LogFormat "%{Cookie}n \"%r\" %t" cookie
> LogFormat "%{User-agent}i" agent
> LogFormat "%{Referer}i -> %U" referer
> LogFormat "%h %l %u %t \"%r\" %>s %b" common
> CustomLog logs/access_log combined
> LogMaint logs/access_log 14 0
> LogMaint logs/error_log 14 0
>
> As you can see, the second line contains the ip address I want to update.  Not sure why it is wiping out the entire file.
>
> Dean Eshleman