ERROR: The certificate of 'github.com' is not trusted.

wget을 이용하여 코드를 내려받을 때 

아래와 같은 에러를 만날 수 있다.

borangepi@Orangepi:~$ wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.1.0.zip

converted 'https://github.com/Itseez/opencv/archive/3.1.0.zip' (ANSI_X3.4-1968) -> 'https://github.com/Itseez/opencv/archive/3.1.0.zip' (UTF-8)

--2016-01-01 00:44:12--  https://github.com/Itseez/opencv/archive/3.1.0.zip

Resolving github.com (github.com)... 192.30.253.112, 192.30.253.113

Connecting to github.com (github.com)|192.30.253.112|:443... connected.

ERROR: The certificate of 'github.com' is not trusted.

ERROR: The certificate of 'github.com' is not yet activated.

The certificate has not yet been activated

ERROR: The certificate of 'github.com' is not trusted.

ERROR: The certificate of 'github.com' is not yet activated.

wget 명령에 옵션으로  "--no-check-certificate" 를 추가하여 다시 실행해본다.

아래처럼 말이다.

$ wget --no-check-certificate -O opencv.zip https://github.com/Itseez/opencv/archive/3.1.0.zip