Shell Programming and Scripting

Hello
I have an file with this content
--------------------------------------------

Code:

timer
one
timer
two
timer
three
timer
four
timer
five
timer
six
timer
seven

-------------------------------------------
And I want the following output.
-------------------------------------------------

Code:

timer 1
one
timer 2
two
timer 3
three
timer 4
four
timer 5
five
timer 6
six
timer 7
seven

-----------------------------------------
So I want after the word timer(this is always the same word) a number
start with one and go up until the end of the file.
I have this code:

Code:

awk '/^timer/{$2+=1}1' file.txt > file1.txt

but this put after every timer the number 1.
Maybe someone know what I have to put inside this code?
Anyway thanks.

Try replacing $2+=1 with $2=++i

Code:

awk '/^timer/{$(NF+1)=++n}1' file.txt > file1.txt

Both solutions work.
Thanks

Code:

awk '/^test/{$0=$0" " ++i}1' file1.txt