131/docker from scratch.md

## docker from scratch.md

      
    Raw
  

              docker from scratch.md
            
          
    minimal curl/wget, with binary file support

function __curl() {
  read proto server path <<<$(echo ${1//// })
  DOC=/${path// //}
  HOST=${server//:*}
  PORT=${server//*:}
  [[ x"${HOST}" == x"${PORT}" ]] && PORT=80

  exec 3<>/dev/tcp/${HOST}/$PORT
  echo -en "GET ${DOC} HTTP/1.0\r\nHost: ${HOST}\r\n\r\n" >&3
  (while read line; do
   [[ "$line" == $'\r' ]] && break
  done && cat) <&3
  exec 3>&-
}

As we cannot use apt-key add, (nothing but gpgv is installed) this is apt-key add - equivalent
__curl http://my-server.com/myrepo.gpg > /etc/apt/trusted.gpg.d/ivs.gpg

Now, all we can use our mirror
echo "deb http://my-server.com/mirror/debian-9 stretch main" > /etc/apt/sources.list
apt-get update