How to remove the ^M return character on Linux

  • Posted by racoonlab
  • Tagged with 
dos2unix -n oldfile.txt newfile.txt

or if the error is within a script: 

sed -i -e 's/\r$//' your-script.sh

Executing a shell script, might end with 

/bin/bash^M: bad interpreter: No such file or directory

The ^M is a carriage return character. Linux uses the line feed character to mark the end of a line, whereas Windows uses the two-character sequence CR LF. Your file has Windows line endings, which is confusing Linux.