What is the meaning of CR + LF?
CR LF means "Carriage Return, Line Feed" - it's a DOS hangover from the olden days from when some devices required a Carriage Return, and some devices required a Line Feed to get a new line, so Microsoft decided to just make a new-line have both characters, so that they would output correctly on all devices.
Windows programs expect their newline format in CRLF (
\r\n). *nix expect just LF data (
\n). If you open a Unix text document in Notepad on windows (earlier than Windows 10 build 1903 released May 2019 which added support for Unix line endings), you'll notice that all of the line breaks disappear and the entire document is on one line. That's because Notepad expects CRLF data, and the Unix document doesn't have the
There are applications that will convert this for you on a standard *nix distro (
For those wondering, a carriage return and a line feed differ from back in Typewriter days, when a carriage return and a line feed were two different things. One would take you to the beginning of the line (Carriage Return) and a one would move you one row lower, but in the same horizontal location (Line Feed)