Table of contents


ux2dos - convert text file(s) from UNIX format to DOS format


ux2dos filelist


ux2dos adds carriage returns to isolated newlines (linefeeds) in UNIX format text files to conform to DOS requirements. Existing carriage-return/newline pairs are left intact, so that no changes are made to a file which is already in DOS format.

Access and modification time stamps of the files are preserved. The SunOS unix2dos and dos2unix utilities do not preserve time stamps, and work on only one file per invocation.

This command may be invoked from either DOS or UNIX. However, the filenames must conform to the conventions of the environment in which the command is invoked.

Each file on the command line is converted in turn to a temporary file, and then the original is deleted, and the temporary file renamed to the original name. If you interrupt the execution of this command, then be sure to check for a file in the current directory named ux2dos.$$$ and rename it manually, if necessary.


dos2mac(1), dos2ux(1), mac2dos(1), mac2ux(1), ux2mac(1), unix2dos(1), dos2unix(1).


Nelson H. F. Beebe
Center for Scientific Computing
University of Utah
Department of Mathematics, 105 JWB
155 S 1400 E RM 233
Salt Lake City, UT 84112-0090
Email:,, (Internet)
Tel: +1 801 581 5254
FAX: +1 801 581 4148