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How to use sed command for change special lines?

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# 1  
Old 01-26-2010
How to use sed command for change special lines?
Hi,

I want to add a character "#" in this few lines with sed command

Initial:
Code:
### CACCIA: DEBUT ###
if $(grep -wqi "$2" /etc/passwd); then
        chuser -R files registry=files $2
fi
### CACCIA: FIN ###

Result with sed command:

Code:
### CACCIA: DEBUT ###
#if $(grep -wqi "$2" /etc/passwd); then
#        chuser -R files registry=files $2
#fi
### CACCIA: FIN ###

Thank you
Last edited by Franklin52; 01-26-2010 at 12:59 PM.. Reason: Please use code tags!
# 2  
Old 01-26-2010
Something like this:
Code:
sed 's/^[^#].*/#&/' file

# 3  
Old 01-26-2010
Or even:
Code:
sed 's/^[^#]/#&/' file

-or-
Code:
sed '/^#/!s/^/#/' file

# 4  
Old 01-26-2010
Code:
awk '!/^#/ {$0="#"$0}1 ' urfile

# 5  
Old 01-27-2010
Hi,

thank you for your reply.
But, i forget to tell that this lines are in a file with other lines.

I have the character "#" in all file.

thank you
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