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concatinating the string in each line of the file

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# 1  
Old 09-01-2009
concatinating the string in each line of the file
how to concatenate particular string in each line of a file..

root$cat conf

check_11043
heartbeat_4345

----------

if i want to add the string "done" output of the file should be

check_11043 done
heartbeat_4345 done
# 2  
Old 09-01-2009
Code:
sed -i 's/$/ done/' conf

or (safer)
Code:
sed -e 's/$/ done/' conf > conf.done

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