How to remove Control-M (^M) from files

Description: How to remove CTRL-M characters from a file in UNIX.

You may need to do this when you import a text file from MS-DOS (or MS-Windows), and forget to transfer it in ASCII or text mode. Here are several ways to do it; pick the one you are most comfortable with.

The easiest way is probably to use the stream editor sed to remove the ^M characters. Type this command:
```
  % sed -e "s/^M//" filename > newfilename
```
To enter ^M, type CTRL-V, then CTRL-M. That is, hold down the CTRL key then press V and M in succession.
You can also do it in vi:
```
  % vi filename
```
Inside vi [in ESC mode] type:
```
  :%s/^M//g
```
To enter ^M, type CTRL-V, then CTRL-M. That is, hold down the CTRL key then press V and M in succession.
You can also do it inside Emacs. To do so, follow these steps:
1. Go to the beginning of the document
2. Type:
```
  M-x replace-string RET C-q C-m RET RET
```
  where "RET" means <press the return key> and C-q and C-m mean <hold the CTRL key and press the m (or q) key>.

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URL: http://www2.ucsc.edu/cats/sc/help/unix/clean_ctrl_m.shtml
Created 1-April-1999 - Last revised on Thursday, 18-Apr-2002 14:30:18 PDT
UC Santa Cruz - Communications and Technology Services - Jacques Delsemme