The text file manipulation is one of the most common job for a system administrator, today I'm going to show how to insert a string at the beginning of each line in a text file.
we have a file named file0.txt and we want to add the string "text to add at the beginning" at the beginning of each line of this file.
we want an output like the following:
1 – The awk
awk can do almost everything on text files, here you are the awk solution for our problem, this sites has a lot of example of text files manipulation using awk.
2 – Sed, the other side of the moon
3 – perl scripting language
4 – line numbering filter
See you soon