How can I insert some text in specific lines of a file? What is the simplest method that I can use? (
What I want to do might be simple, but I don't know where I should start. It takes too much time for me to try to do this manually (I have a lot of files that I have to change for Excel/Calc later use).
Here is my input file example:
4.06 4.05 5.04 4.06 34.50 56.06 45.33 36.44
And I want something like this (insert text before line 1 and 5):
Exp1 4.06 4.05 5.04 4.06 Exp2 34.50 56.06 45.33 36.44
How can I do this?