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How to search and replace a particular line in file with sed command

 
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# 1  
Old 05-20-2009
Data How to search and replace a particular line in file with sed command
Hello,

I have a file and in that, I want to search for a aprticular word and then replace another word in the same line with something else.

Example: In file abc.txt, there is a line
<host oa_var="s_hostname">test</host>

I want to search with s_hostname text and then replace test with prod.

How do I achieve this with the sed or some other command.

Please help.

Thanks in advance.

Sam
# 2  
Old 05-20-2009
using perl to search and replace
Hope this helps, I created a file prodtest for example

Code:
$ perl -pe 'if ( $_ =~ /hostname/ ) { s/test/prod/ }' prodtest

st oa_var="s_hostname">prod</host>
<host oa_var="s_name">test</host>
<host oa_var="s_hostname">qa</host>
<host oa_var="s_hostname">prod</host>
<host oa_var="s_host">test</host>


$ cat prodtest

st oa_var="s_hostname">test</host>
<host oa_var="s_name">test</host>
<host oa_var="s_hostname">qa</host>
<host oa_var="s_hostname">test</host>
<host oa_var="s_host">test</host>


$ perl -i -pe 'if ( $_ =~ /hostname/ ) { s/test/prod/ }' prodtest


$ cat prodtest

st oa_var="s_hostname">prod</host>
<host oa_var="s_name">test</host>
<host oa_var="s_hostname">qa</host>
<host oa_var="s_hostname">prod</host>
<host oa_var="s_host">test</host>

# 3  
Old 05-30-2009
Hi Doutdes,

Thanks for your response and apologize for delayed reply.

In the meantime, I came up with following solution.

cat abc.txt | sed "/s_hostname/s/test/prod/g" > xyz.txt

Thanks,

Samir
 
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