parser.add_argument('--port', required=True,
help='serial console device to connect ' +
'to (e.g. /dev/pts/X)')
-parser.add_argument('--hostname', default="stretch",
+parser.add_argument('--hostname', default="buster",
help='hostname of the system for login process ' +
- '(default: stretch)')
+ '(default: buster)')
parser.add_argument('--pipefile', default="./serial0",
help='file name for named pipe file (for ' +
'interacting between host + VM via QEMU ' +