The certificate of ‘raw.githubusercontent.com’ is not trusted的解决办法

今天甲骨文选择Ubuntu16.04后，用萌咖的dd脚本dd成Debian9后，安装探针使用

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wget https://raw.githubusercontent.com/CokeMine/ServerStatus-Hotaru/master/status.sh

出现

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ERROR: The certificate of ‘raw.githubusercontent.com’ is not trusted. 
ERROR: The certificate of ‘raw.githubusercontent.com’ hasn't got a known issuer.

解决方法是

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sudo apt-get install ca-certificates

或者

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sudo apt-get install ssl-cert