利用dockerfile文件建立镜像时，下面这一步报错：
报错内容为：
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/p/python3-defaults/python3_3.5.1-3_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/m/mesa/libgbm1_18.0.5-0ubuntu0~16.04.1_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/libe/libedit/libedit2_3.1-20150325-1ubuntu2_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/d/d-conf/libdconf1_0.24.0-2_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/d/d-conf/dconf-gsettings-backend_0.24.0-2_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/l/less/less_481-2.1ubuntu0.2_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/a/at-spi2-atk/libatk-bridge2.0-0_2.18.1-2ubuntu1_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/g/gtk+3.0/libgtk-3-0_3.18.9-1ubuntu3.3_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/s/shine/libshine3_3.1.0-4_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/libb/libbluray/libbluray1_0.9.2-2_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/b/boost-defaults/libboost-date-time-dev_1.58.0.1ubuntu1_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/b/boost1.58/libboost-log1.58-dev_1.58.0+dfsg-5ubuntu3.1_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/b/boost1.58/libboost-math1.58.0_1.58.0+dfsg-5ubuntu3.1_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/n/netcdf/libnetcdf11_4.4.0-2_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/s/spatialite/libspatialite7_4.3.0a-5_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/q/qt4-x11/libqt4-xml_4.8.7+dfsg-5ubuntu2_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/main/q/qt4-x11/libqt4-svg_4.8.7+dfsg-5ubuntu2_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/v/vtk6/libvtk6-java_6.2.0+dfsg1-10ubuntu0.1_amd64.deb Hash Sum mismatch
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ubuntu/pool/universe/w/wxpython3.0/python-wxgtk3.0_3.0.2.0+dfsg-1build1_amd64.deb Hash Sum mismatch
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
应该就是Hash Sum mismatch，哈希值不匹配的问题，查阅了网上很多解决办法，基本都试过了，包括：删除list文件下内容，重新建立文件夹更新源；换源（但不知道换的对不对，是在dockerfile文件中换的）；按照提示maybe run apt-get update or try with --fix-missing?修复；这三个方法暂时都不行，麻烦各位网友给点意见吧！
