You can find one way on this Wikipedia page:
TYPE unix_file | FIND "" /V > dos_file
Remember that you can't redirect the output to the same file you're reading from. This applies to pretty much all systems and shells, so an additional rename is necessary.
The key here is that type
knows how to read LF line endings and find
will then convert them do CRLF. type
alone won't do anything with the output (it's supposed to, because having a command that simply dumps the file contents messing with them isn't good :-)).
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…