Dos (windows) to unix:

• meta-style:
  M-x set-buffer-file-coding-system RET undecided-unix

• control-style:
  C-x RET f undecided-unix

Unix to dos (windows):

• meta-style:
  M-x set-buffer-file-coding-system RET undecided-dos

• control-style:
  C-x RET f undecided-dos

This is more a memo to self than a public utility post, because every time I need to do this conversion I don’t remember the command and I have to google for it. From now on I will skip the google step