将换行格式从Mac转换为Windows

carriage return

line feed

\\r\\n

\\n

dos2unix

Perl

sed

sed -e \'s/$/\\r/\' inputfile > outputfile                # UNIX to DOS  (adding CRs)
sed -e \'s/\\r$//\' inputfile > outputfile                # DOS  to UNIX (removing CRs)
perl -pe \'s/\\r\\n|\\n|\\r/\\r\\n/g\' inputfile > outputfile  # Convert to DOS
perl -pe \'s/\\r\\n|\\n|\\r/\\n/g\'   inputfile > outputfile  # Convert to UNIX
perl -pe \'s/\\r\\n|\\n|\\r/\\r/g\'   inputfile > outputfile  # Convert to old Mac

perl -pi -e \'s/\\r\\n|\\n|\\r/\\r\\n/g\' file-to-convert  # Convert to DOS
perl -pi -e \'s/\\r\\n|\\n|\\r/\\n/g\'   file-to-convert  # Convert to UNIX

brew install unix2dos

unix2dos file-to-convert

dos2unix file-to-convert

$ man unix2dos

NAME
       dos2unix - DOS/MAC to UNIX and vice versa text file format converter

SYNOPSIS
           dos2unix [options] [-c CONVMODE] [-o FILE ...] [-n INFILE OUTFILE ...]
           unix2dos [options] [-c CONVMODE] [-o FILE ...] [-n INFILE OUTFILE ...]

DESCRIPTION
       The Dos2unix package includes utilities \"dos2unix\" and \"unix2dos\" to convert plain text files in DOS or MAC format to UNIX format and vice versa.  Binary files and non-
       regular files, such as soft links, are automatically skipped, unless conversion is forced.

       Dos2unix has a few conversion modes similar to dos2unix under SunOS/Solaris.

       In DOS/Windows text files line endings exist out of a combination of two characters: a Carriage Return (CR) followed by a Line Feed (LF).  In Unix text files line
       endings exists out of a single Newline character which is equal to a DOS Line Feed (LF) character.  In Mac text files, prior to Mac OS X, line endings exist out of a
       single Carriage Return character. Mac OS X is Unix based and has the same line endings as Unix.

tr

tr -d \"\\r\" <infile.txt >outfile.txt

vim

vim hello.txt <<EOF
:set fileformat=dos
:wq
EOF

#!/bin/bash

# http://stackoverflow.com/questions/6373888/converting-newline-formatting-from-mac-to-windows

# =============================================================================
# =
# = FIXTEXT.SH by ECJB
# =
# = USAGE:  SCRIPT [ MODE ] FILENAME
# =
# = MODE is one of unix2dos, dos2unix, tounix, todos, tomac
# = FILENAME is modified in-place
# = If SCRIPT is one of the modes (with or without .sh extension), then MODE
# =   can be omitted - it is inferred from the script name.
# = The script does use the file command to test if it is a text file or not,
# =   but this is not a guarantee.
# =
# =============================================================================

clear
script=\"$0\"
modes=\"unix2dos dos2unix todos tounix tomac\"

usage() {
    echo \"USAGE:  $script [ mode ] filename\"
    echo
    echo \"MODE is one of:\"
    echo $modes
    echo \"NOTE:  The tomac mode is intended for old Mac OS versions and should not be\"
    echo \"used without good reason.\"
    echo
    echo \"The file is modified in-place so there is no output filename.\"
    echo \"USE AT YOUR OWN RISK.\"
    echo
    echo \"The script does try to check if it\'s a binary or text file for sanity, but\"
    echo \"this is not guaranteed.\"
    echo
    echo \"Symbolic links to this script may use the above names and be recognized as\"
    echo \"mode operators.\"
    echo
    echo \"Press RETURN to exit.\"
    read answer
    exit
}

# -- Look for the mode as the scriptname
mode=\"`basename \"$0\" .sh`\"
fname=\"$1\"

# -- If 2 arguments use as mode and filename
if [ ! -z \"$2\" ] ; then mode=\"$1\"; fname=\"$2\"; fi

# -- Check there are 1 or 2 arguments or print usage.
if [ ! -z \"$3\" -o -z \"$1\" ] ; then usage; fi

# -- Check if the mode found is valid.
validmode=no
for checkmode in $modes; do if [ $mode = $checkmode ] ; then validmode=yes; fi; done
# -- If not a valid mode, abort.
if [ $validmode = no ] ; then echo Invalid mode $mode...aborting.; echo; usage; fi

# -- If the file doesn\'t exist, abort.
if [ ! -e \"$fname\" ] ; then echo Input file $fname does not exist...aborting.; echo; usage; fi

# -- If the OS thinks it\'s a binary file, abort, displaying file information.
if [ -z \"`file \"$fname\" | grep text`\" ] ; then echo Input file $fname may be a binary file...aborting.; echo; file \"$fname\"; echo; usage; fi

# -- Do the in-place conversion.
case \"$mode\" in
#   unix2dos ) # sed does not behave on Mac - replace w/ \"todos\" and \"tounix\"
#       # Plus, these variants are more universal and assume less.
#       sed -e \'s/$/\\r/\' -i \'\' \"$fname\"             # UNIX to DOS  (adding CRs)
#       ;;
#   dos2unix )
#       sed -e \'s/\\r$//\' -i \'\' \"$fname\"             # DOS  to UNIX (removing CRs)
#           ;;
    \"unix2dos\" | \"todos\" )
        perl -pi -e \'s/\\r\\n|\\n|\\r/\\r\\n/g\' \"$fname\"  # Convert to DOS
        ;;
    \"dos2unix\" | \"tounix\" )
        perl -pi -e \'s/\\r\\n|\\n|\\r/\\n/g\'   \"$fname\"  # Convert to UNIX
        ;;
    \"tomac\" )
        perl -pi -e \'s/\\r\\n|\\n|\\r/\\r/g\'   \"$fname\"  # Convert to old Mac
        ;;
    * ) # -- Not strictly needed since mode is checked first.
        echo Invalid mode $mode...aborting.; echo; usage
        ;;
esac

# -- Display result.
if [ \"$?\" = \"0\" ] ; then echo \"File $fname updated with mode $mode.\"; else echo \"Conversion failed return code $?.\"; echo; usage; fi

cat foo | col -b > foo2

sed -e \'s/^M$//\' -i \'\' filename

#!/usr/bin/perl -wpi
s/\\n|\\r\\n/\\r\\n/g;