[Sed] Replace newline (\n) to different symbol

[Sed] Replace newline (\n)  to different symbol

sed ':a;  N;  $!ba;  s/\n/=""\n/g' 1.txt



1. create a label via :a

2. append the current and next line to the pattern space via N

3. if we are before the last line, branch to the created label $!ba ($! means not to do it on the last line (as there should be one final newline)).

4. finally the substitution replaces every newline with a space on the pattern space (which is the whole file).

 

Reference:

• 
  sed: How can I replace a newline (\n)?