ruby安装失败的Linux薄荷17.3

Question

我尝试使用官方指南install rails on ubuntu14在linuxmint 17（x64）上安装ruby，但它失败并出现以下错误。我的curl version is 7.45.0

local~# rbenv install -v 2.3.1
/tmp/ruby-build.20160831221528.6331 ~
Downloading ruby-2.3.1.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.1.tar.bz2
curl: (77) error setting certificate verify locations:
  CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
error: failed to download ruby-2.3.1.tar.bz2

BUILD FAILED (LinuxMint 17.3 using ruby-build 20160602-35-gf08cb5c)