bash - How to insert a new line character after a fixed number of characters in a file

Question

I am looking for a bash or sed script (preferably a one-liner) with which I can insert a new line character after a fixed number of characters in huge text file.

question from:https://stackoverflow.com/questions/1187078/how-to-insert-a-new-line-character-after-a-fixed-number-of-characters-in-a-file

Answer 1

How about something like this? Change 20 is the number of characters before the newline, and temp.text is the file to replace in..

sed -e "s/.{20}/&
/g" < temp.txt