$ cat > test
this is a test
this is a test
this is a test
12345678901234
$ od -t x1 test
000000  74  68  69  73  20  69  73  20  61  20  74  65  73  74  0a  74
000020  68  69  73  20  69  73  20  61  20  74  65  73  74  0a  74  68
000040  69  73  20  69  73  20  61  20  74  65  73  74  0a  31  32  33
000060  34  35  36  37  38  39  30  31  32  33  34  0a
000074
$ \ls -l test
-rw-------  1 ikegami  users  60 May 19 09:40 test