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i think it can modify the variable. but I have to replace the line..

file.txt

aa bb cc
bb hh kk
kk ll yy
dd aa kk
rr tt aa

var=bb hh kk

now i want to replace line "bb hh kk" with "#bb hh kk" using variable $var.

suppose I have store the whole line in a variable. could you please tel me how can I insert # on this line?

I have a file and I can get the line with a specific pattern. I want to inset # on start of the line.

file.text
====
aa bb cc
bb hh kk
kk ll yy
dd aa kk
rr tt aa

I want to comment out the...

p1=text1
p2=text2(in red color)

when i am trying to replace $p1 with $p2, content of the file from text2 become red. so when i open that file using vi its showing color code before tex2.
please...

Yes, Its working fine now... Thanks :)

cat test
1 a
2 b
3 c
4 d
5 e
6 f
7 g


sed '2,4H;6{;x;s/^\n//;p;x;}' test

1 a
2 b
2 b
3 c
3 c
2 b
3 c
4 d

Hello Siniri,

Code is not working properly for me... could you please explain the code??

Thanks,
Biplab

Asked in a Interview of top MNC company...:)

I want to say that...
if
1 a
2 b
3 c
4 d
5 e
6 f
7 g
now if i copy from 2nd line to 4th line and paste it before 6th line.. o/p will be
1 a
2 b
3 c
4 d
5 e
2 b
3 c
4 d
6 f
7 g

Hi,

I want to know how I can copy line 6th to 10th and paste it after 17th line in same file.

Thanks,
Biplab