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How to delete a string pattern in a file and write back to the same file

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# 1  
Old 11-18-2009
How to delete a string pattern in a file and write back to the same file

I have a control file which looks like this

INFILE '/array/data/data_Finished_T5_col_change/home/oracle/emp.dat'

How can i edit the 5th line to:


I want to get rid of


i prefer sed for this

# 2  
Old 11-18-2009
sed -i 's/ OPTIONALLY E.*//' controlfile

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