Shell Programming and Scripting

Hi,

Somebody please assist me in updating the data from one file to the other in Shell Scripting.

There are two files file1 and file2. Both the files have differen data but a common attribute. e.g. JAVA_HOME.

e.g. file1 has JAVA_HOME=/usr/j2se and
file2 has JAVA_HOME=/usr/jdk1.4.2

Now through shell script I want to update file1 content with the path of the JAVA_HOME provided in the file2.

I am not getting exactly how to use awk and sed for this operation.

Try:

Code:

sed 's!\(JAVA_HOME=.*\)!'$(grep JAVA_HOME file2)'!' < file1 > file1_modified

I'm sure there are some folks who know sed and awk much better than I do who can help you out. I'm curious if changing the JAVA_HOME in file2 is what you are trying to do, then have you thought about setting the JAVA_HOME in your profile and just referencing it with ${JAVA_HOME} in your scripts? This way, when the JAVA_HOME changes, all you have to do is change it once in your profile and the scripts will automatically reference the new home. Just a suggestion.

Hi Dennis Jacob,

Your code really worked for me. Thanks a lot.