wgetの終了ステータス(Exit Status)一覧

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2.13 Exit Status

Wget may return one of several error codes if it encounters problems.

0 No problems occurred.
1 Generic error code.
2 Parse error—for instance, when parsing command-line options, the ‘.wgetrc’ or ‘.netrc’...
3 File I/O error.
4 Network failure.
5 SSL verification failure.
6 Username/password authentication failure.
7 Protocol errors.
8 Server issued an error response.