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Shell Programming and Scripting

Insert text before first 'n' lines

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# 1  
Old 05-27-2013
Insert text before first 'n' lines
I want to put a particular text, say, the hash '#' before each of the first n lines of a file.

How can I do that?
# 2  
Old 05-27-2013
From line 1 to 3 , it will insert "#"
Code:
 sed '1,3 i #' filename

# 3  
Old 05-27-2013
This will put a # symbol before each of the first 10 lines of a file. Modify accordingly.
Code:
sed '1,10s/^/#/' file

# 4  
Old 05-27-2013
Put # before 10 first lines using awk.
Code:
awk 'NR<=10 {$0="#" $0} 1' file

# 5  
Old 05-27-2013
balajesuri and Jtone's suggestion work fine. Thanks.
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