about CR/LF

CR:Carriage Return(回车)

LF:Line Feed(换行)

windows use CR/LF to terminate line,*nix use LF,MAC uses CR.

if you tranfer windows file to unix.sometimes, you can see ^M at the end of each line in the file. ^M is CR sign in unix.

you can use tr or sed command to solve this problem.

windows -> Unix

tr -d '\r' < oldfile > newfile

sed 's/.$//'

Unix->windows

sed -e 's/$/\r/' myunix.txt > mydos.txt

in VIM

:set ff:show the file format.

:set ff=unix:set the file format to unix.