问题
How to replace \n from a line using sed command?
回答1:
It's gross, because sed normally processes a line at a time:
sed -e :a -e N -e 's/\n/ /' -e ta input.txt
This is nicer:
tr '\n' ' ' < input.txt
I chose to replace the newline with a space. tr can only replace by a single character (or delete with the -d option).
Flexible and simple:
perl -ne 'chomp;print $_," "' input.txt
Where " " is whatever you want in place of the newline.
来源：https://stackoverflow.com/questions/1442702/replacing-newline-sed