Question

i have some problems.
I have one big file that provide one error with text “it’s an error”.
In source code I have a lot of lines with same text.
How I can change all this line to counted lines.
I mean that i want to change it like this:

some_function ()
 {
 provide  "it's an error"
  } 
 another_function ()
 provide  "it's an error"
 provide  "it's an error"

And now i want to get next:

some_function ()
 {
 provide  "1 it's an error"
  } 
 another_function ()
 provide  "2 it's an error"
 provide  "3 it's an error"

Or the same but with line numbers.

Answer 1

With line numbers:

awk '{gsub(/it.s an error/, NR" &"); print }' filename