How to insert a new line character after a fixed number of characters in a file
bash, sed
Solution
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\}/&\n/g" < temp.txt
Problem
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.