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To add a new line with specific text after the pattern is found using sed

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# 1  
Old 01-11-2013
To add a new line with specific text after the pattern is found using sed
hi guys,

im trying to add the following line in my xml file
Code:
<dbrollbacksegs <oa_var="s_db_rollback_segs">NOROLLBACK</dbrollbacksegs>

when ever i find the following line
Code:
<dbsharedpool oa_var="s_dbsharedpool_size">300000000</dbsharedpool>

I have succedded till adding a new line after the above searched pattern but not able to insert my specifc part (NOROLLBACK)

Code:
users/oracle> cat  file
    <dbsharedpool oa_var="s_dbsharedpool_size">300000000</dbsharedpool>
/users/oracle > sed 's/dbsharedpool>/&\n/g' file
         <dbsharedpool oa_var="s_dbsharedpool_size">300000000</dbsharedpool>

/users/oracle >

But my Output should be something like this
Code:
/users/oracle > sed 's/dbsharedpool>/&\n/g' file
         <dbsharedpool oa_var="s_dbsharedpool_size">300000000</dbsharedpool>
         <oa_var="s_db_rollback_segs">NOROLLBACK</dbrollbacksegs>
/users/oracle >

Pls help
# 2  
Old 01-11-2013
Code:
# cat file
<dbsharedpool oa_var="s_dbsharedpool_size">300000000</dbsharedpool>
<ABCD>
</ABCD>
<EFGH>
</EFGH>

Code:
#  sed '/<\/dbsharedpool>/ a\ <dbrollbacksegs <oa_var="s_db_rollback_segs">NOROLLBACK</dbrollbacksegs>' file
<dbsharedpool oa_var="s_dbsharedpool_size">300000000</dbsharedpool>
 <dbrollbacksegs <oa_var="s_db_rollback_segs">NOROLLBACK</dbrollbacksegs>
<ABCD>
</ABCD>
<EFGH>
</EFGH>

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