Line Ending Header

Use the Sforce-Line-Ending header to specify how line endings are formatted.

When you create a Bulk API 2.0 job, specify a line ending that matches the line ending used to create the CSV file using the lineEnding request field. Bulk API 2.0 supports two line-ending formats:

LF linefeed
CRLF carriage-return plus linefeed

The default line ending, if not specified, is LF. Different operating systems use different characters to mark the end of a line.

Unix / Linux / OS X uses LF (line feed, '\n', 0x0A).

Windows / DOS uses CRLF (carriage return followed by line feed, '\r\n', 0x0D0A).

For example,

1{
2    "object" : "Account",
3    "contentType" : "CSV",
4    "operation" : "insert",
5    "lineEnding" : "LF"
6}

Note that it’s possible that the text editor used to create the CSV file is configured for a specific line-ending format and might supersede the default operating system format.

Bulk API 2.0 and Bulk API Developer Guide

Line Ending Header