Is there a Bash command to convert \r\n to \n?

linux bash newlines carriage-return

37,092

Solution 1

There is:

dos2unix

Solution 2

There is a Unix utility called conv that can convert line endings. It is often invoked with softlinks to u2d or d2u or unix2dos or dos2unix.

Additionally there are utilities called fromdos and todos.

Solution 3

Translate (tr) is available in all Unixes:

tr -d '\r'  # From \r\n line end (DOS/Windows), the \r will be removed so \n line end (Unix) remains.

Solution 4

With sed and find that end with .txt, .php, .js, .css:

 sed -rie 's/\r\n/\n/' \
 $(find . -type f -iregex ".*\.\(txt\|php\|js\|css\)")

Solution 5

Doing this with POSIX is tricky:

POSIX Sed does not support \r or \15. Even if it did, the in place option -i is not POSIX
POSIX Awk does support \r and \15, however the -i inplace option is not POSIX
d2u and dos2unix are not POSIX utilities, but ex is
POSIX ex does not support \r, \15, \n or \12

To remove carriage returns:

awk 'BEGIN{RS="\1";ORS="";getline;gsub("\r","");print>ARGV[1]}' file

To add carriage returns:

awk 'BEGIN{RS="\1";ORS="";getline;gsub("\n","\r&");print>ARGV[1]}' file

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37,092

David Powell

Updated on September 17, 2022

Comments

David Powell over 1 year

Is there a Bash command to convert \r\n to \n?

When I upload my scripts from Windows to Linux, I need a utility like this to make things work.
- Bob_Gneu almost 14 years
  
  dos2unix is usually available, otherwise sed -e 's/\r$//'
- Dennis Williamson almost 14 years
  
  No, there's no Bash command for that, but there's dos2unix which is a Unix/Linux program to do what you want.
- vtest almost 14 years
  
  Why don't you just use a sane text editor that lets you choose newline style when saving files?
ivan_pozdeev almost 11 years

Has a side-effect of removing any other \r's too. They're highly uncommon though.
Jared almost 10 years

This is the historically correct answer, though dos2unix is not always available these days.
dwana over 8 years

I diden't even know ed,but it does the job (old but gold)
FK- over 4 years

This command worked for me when commands from other answers did not exist on the shared hosting I am using. Thanks :)
Ravindra Bawane over 3 years

Some explanation and formatting would make this an answer. Right now it's just a comment.