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How to remove the # char form a line?

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Top Forums Shell Programming and Scripting How to remove the # char form a line?
# 1  
Old 01-02-2013
How to remove the # char form a line?
Hi,

my file has below details and I want remove the # char from only specific line.

Code:
#TEST:00:START
#TEST1:01:INPROCESS
#TEST2:02:ABOUTTO
#TEST3:03:COMP

i.e if want remove the # from 2nd line then file to be updated as

Code:
#TEST:00:START
TEST1:01:INPROCESS
#TEST2:02:ABOUTTO
#TEST3:03:COMP

please provide the script to do this.

Thanks,
Sandy
Last edited by Scrutinizer; 01-03-2013 at 03:15 AM.. Reason: code tags
# 2  
Old 01-03-2013
try:
Code:
awk 'NR==2 {sub("^#","")} 1' infile

or:
Code:
sed '2{s/^#//}' infile

# 3  
Old 01-03-2013
Code:
sed '2s/^#//' infile

--
@rdrxt1, some seds require a semicolon before the closing brace.
# 4  
Old 01-03-2013
And if you like to program the line to remove
Code:
line=2
awk 'NR==inp {sub("^#","")} 1' inp=line infile

# 5  
Old 01-03-2013
Thanks quick solutions.

if the line number is unknow, will it be posible to update based on the content means TEST or TEST1?
# 6  
Old 01-03-2013
Try:
Code:
sed '/TEST1:/s/^#//' file

# 7  
Old 01-03-2013
Code:
awk '/TEST1:/ {sub("^#","")} 1' infile
awk '/TEST:/ {sub("^#","")} 1' infile

The : is needed so that it selects only TEST and not TEST1 and TEST when search for TEST
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