sed: properly replace lines containing paths via bash script - bash

Question

I am trying to write a bash script that will do backup-based DUPLICATE database (Oracle) from Production to Development host. One of the steps is to take a copy of the Production database pfile, edit it properly and then power-up a new instance on another host. I am having difficulties to do the following on my bash script:
Production pfile: (single line taken as an example, all others are the same)
*.audit_file_dest='/u01/app/grid/admin/orcl11/adump'
Let's say that the above line should be changed completely to:
*.audit_file_dest='/u02/another/path'
I've had a look at the examples on StackOverflow, but I really can't understand them. Can someone please help me on that?
Many thanks in advance!
EDIT: Thanks a lot guys. This worked out like a charm. Topic Answered.

Answer 1

If it's exactly as you pasted in the question, you can use sed to substitute:
sed -i "s#audit_file_dest='/u01/app/grid/admin/orcl11/adump'#audit_file_dest='/u02/another/path'#" your_file

Answer 2

if you just need to change the single line in your question, #leafei 's line works for you.
if you want to customize your "pfile", like:
change
nameA='oldA'
nameB='oldB'
nameC='oldC'
to
nameA='newA'
nameB='oldB' #here perhaps you want to keep the old value
nameC='newC'
you could try this:
awk 'BEGIN{s="\x27";FS=OFS="="}{if($1=="nameA"){print $1,s"newA"s;next;} if($1=="nameC"){print $1,s"newC"s;next;}}1' pfile
test:
kent$ echo "nameA='oldA'
nameB='oldB'
nameC='oldC'"|awk 'BEGIN{s="\x27";FS=OFS="="}{if($1=="nameA"){print $1,s"newA"s;next;} if($1=="nameC"){print $1,s"newC"s;next;}}1'
nameA='newA'
nameB='oldB'
nameC='newC'