title: rustup install stable error during download
body: <p>I install Rust with command:</p>
  
  <pre><code>$ curl -sSf https://static.rust-lang.org/rustup.sh | sh
  </code></pre>
  
  <p>when I run:</p>
  
  <pre><code>$ rustc main.rs
  </code></pre>
  
  <p>this appeared:</p>
  
  <pre><code>error: no default toolchain configured
  </code></pre>
  
  <p>so I run:</p>
  
  <pre><code>rustup install stable
  </code></pre>
  
  <p>then:</p>
  
  <pre><code>info: downloading component 'rust-std'
   23.2 MiB /  56.2 MiB ( 41 %)  67.2 KiB/s ETA: 503 s                error: component download failed for rust-std-x86_64-unknown-linux-gnu
  info: caused by: could not download file from 'https://static.rust-lang.org/dist/2018-07-10/rust-std-1.27.1-x86_64-unknown-linux-gnu.tar.xz' to '/home/kwebi/.rustup/downloads/d3b0d00357cfaecf85651bea6f1d72793a5a859b6b07e9613ba21285922d5d58.partial'
  info: caused by: error during download
  info: caused by: [56] Failure when receiving data from the peer (OpenSSL SSL_read: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac, errno 0)
  </code></pre>
  
  <p>at the first,I use the follow to install rust, the error information printed as before, there is a download error:</p>
  
  <pre><code>$ curl https://sh.rustup.rs -sSf | sh
  curl: (56) OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 104
  rustup: command failed: downloader https://static.rust-lang.org/rustup/dist/x86_64-unknown-linux-gnu/rustup-init /tmp/tmp.2EZ69sGKWR/rustup-init
  </code></pre>
  
  <p>what can I do to install rust currently and completely?</p>