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Shell script find word from one file and insert in another file

 
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# 1  
Old 08-24-2011
Shell script find word from one file and insert in another file
Hi,
I am new to shell scripting. I need a bash shell scripts which search and grep a parameter value from input.txt file and insert it in between two semicolon of second line of output.txt file.
For example
The shell script search an IP address as parameter value from input.txt
------------------------------------------
vi input.txt
DUT_IPaddress=10.10.20.25
--------------------------------------------
And the shell script should insert the IP address in between two semicolons present at second line of output.txt file.
-------------------------------------------
vi output.txt
#this is configuration file
15952;;sunil
------------------------------------------
# 2  
Old 08-25-2011
Code:
#!/bin/bash

var=$(sed 's/.*=\(.*\)/\1/' < input.txt)
sed -i "/;;/s/\([^;]*;\)\(;[^;]*\)/\1$var\2/" output.txt

I have used sed's in-place edit '-i' option. If that is not available in your machine use redirection feature instead. I hope there will be more easier methods than my solution.
# 3  
Old 08-25-2011
Code:
IP_val=`awk -F= ' { print $2 } ' inputfile`
sed -n '2p' config_file | nawk -F";" -v IP="$IP_val" ' { print $1";"IP";"$3 } '

 
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