Normalize line-endings examples with sed.
#!/bin/sh
# For DOS to Unix:
sed s/.$// infilename >outfilename
#For Mac to Unix:
sed s/x0d/x0a/ infilename >outfilename
# For Unix to DOS:
sed s/$/x0d/ infilename >outfilename
# For Unix to Mac:
sed s/x0a/x0d/ infilename >outfilename
# For DOS to Mac:
sed s/x0d// infilename >outfilename
# For Mac to DOS:
sed s/x0a/x0dx0a/ infilename >outfilename