apt-get install curl libcurl3-openssl-dev
安装好后查看curl安装在哪里 dpkg -L curl
$ cd /usr/share/doc/curl
$ sudo wget http://curl.haxx.se/ca/cacert.pem
$ sudo mv curl-ca-bundle.crt old.curl-ca-bundle.crt #要是没有旧文件就不用管它
$ sudo mv cacert.pem curl-ca-bundle.crt
vi /etc/profile
export CURL_CA_BUNDLE=/usr/share/doc/curl/curl-ca-bundle.crt
source /etc/profile
