dos,unix格式文件转换

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转：dos,unix格式文件转换

The UNIX end-of-line character is a line feed/newline character ( /n). The DOS/Windows end-of-line character is a carriage return, followed by a line feed/newline ( /r/n).

Most editors can automatically convert these to the appropriate format, but others, such as Notepad in Windows, cannot.

To convert a UNIX file to DOS using sed(GNU sed3.02.80 or later):
$ sed 's/$//r/' UNIX_file > DOS_file

To convert a DOS file to UNIX file, use trto remove the carriage return:
$ tr -d '/r' < DOS_file > UNIX_file

To accomplish the same thing using sed:
$ sed 's/^M//' DOS_file > UNIX_file

Note: To generate the ^Mabove, press Ctrl-V, then Ctrl-M.

FTP's ASCIItransfer mode will automatically do the end-of-line conversion between DOS and UNIX systems.

Also, the commands dos2unixand unix2dosmay be used to perform. the conversion, if present on your system.

Emacs

You can also convert aDOSfile nameddosfile.txtto aUnixtext file usingEmacs, aUnixtext editor. Enter at theUnixshell prompt:
```
emacsdosfile.txt
```
This will open the file in theEmacstext editor. To remove all the "^M" characters, type
```
M-% C-q C-m RET RET !
```
It may also be necessary to remove aCtrl-zat the end of the document. To quickly get to the end of the document inEmacs, type
```
M->
```
If you see aCtrl-zat the end of the document, delete it.

To convert aUnixfile namedunixfile.txtto aDOStext file, first open it inEmacs. At theUnixshell prompt, enter
```
emacsunixfile.txt
```
This will open the file in theEmacstext editor. To add carriage returns, which will show up as^MinEmacs, type
```
M-% C-q C-j RET C-q C-m C-q C-j RET !
```
It may also be necessary to add aCtrl-zat the end of the document. At the very end of the document, press
```
C-q C-z
```