/tmp/demo2>file *.txt
oldmac.txt:  ASCII text, with CR line terminators
unix.txt:    ASCII text, with CRLF line terminators
windows.txt: ASCII text, with CRLF, CR line terminators

/tmp/demo2>od -tx1 -c windows.txt
0000000  6c  69  6e  65  20  31  0d  0d  0a  6c  69  6e  65  20  32  0d
          l   i   n   e       1  \r  \r  \n   l   i   n   e       2  \r
0000020  0d  0a  6c  69  6e  65  20  33  0d  0d  0a
         \r  \n   l   i   n   e       3  \r  \r  \n
0000033

/tmp/demo2>