Emacs 5: Offical Tutorial Part 4

>> Type C-x b *Messages* <Return> to look at the buffer of messages.
   Then type C-x b TUTORIAL <Return> to come back to this tutorial.


C-x s     Save some buffers

C-x s asks you about each buffer which contains changes that you have
not saved.  It asks you, for each such buffer, whether to save the
buffer.

>> Insert a line of text, then type C-x s.
   It should ask you whether to save the buffer named TUTORIAL.
   Answer yes to the question by typing "y".

Line 635