How to convert DOS/Windows newline (CRLF) to Unix newline (LF) in a Bash script

tr -d "\r" < file

# In a Unix environment: convert DOS newlines (CR/LF) to Unix format.

sed 's/.$//'               # Assumes that all lines end with CR/LF

sed 's/^M$//'              # In Bash/tcsh, press Ctrl-V then Ctrl-M

sed 's/\x0D$//'            # Works on ssed, gsed 3.02.80 or higher



# In a Unix environment: convert Unix newlines (LF) to DOS format.

sed "s/$/`echo -e \\\r`/"            # Command line under ksh

sed 's/$'"/`echo \\\r`/"             # Command line under bash

sed "s/$/`echo \\\r`/"               # Command line under zsh

sed 's/$/\r/'                        # gsed 3.02.80 or higher

vim file.txt -c "set ff=unix" -c ":wq"

vim file.txt -c "set ff=dos" -c ":wq"

awk '{ sub("\r$", ""); print }' dos.txt > unix.txt

perl -pe 's/\r$//' < dos.txt > unix.txt