$ wget.exe
BusyBox v1.25.0-FRP-441-g53c3b08 (2016-05-24 12:20:38 BST) multi-call binary.
Usage: wget [-c|--continue] [-s|--spider] [-q|--quiet] [-O|--output-document FILE]
[--header 'header: value'] [-Y|--proxy on/off] [-P DIR]
[-U|--user-agent AGENT] URL...
Retrieve files via HTTP or FTP
-s Spider mode - only check file existence
-c Continue retrieval of aborted transfer ← コレ
-q Quiet
-P DIR Save to DIR (default .)
-O FILE Save to FILE ('-' for stdout)
-U STR Use STR for User-Agent header
-Y Use proxy ('on' or 'off')
