How to remove the # char form a line?

Shell Programming and Scripting
1

Hi,

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

#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

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

please provide the script to do this.

Thanks,
Sandy

2

try:

awk 'NR==2 {sub("^#","")} 1' infile

or:

sed '2{s/^#//}' infile
3 
sed '2s/^#//' infile

--
@rdrxt1, some seds require a semicolon before the closing brace.

4

And if you like to program the line to remove

line=2
awk 'NR==inp {sub("^#","")} 1' inp=line infile
5

Thanks quick solutions.

if the line number is unknow, will it be posible to update based on the content means TEST or TEST1?

6

Try:

sed '/TEST1:/s/^#//' file
7 
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