商店里 好多软件装不上，下载失败，安装失败。使用apt-get install mysql-server
E: 无法下载 http://packages.deepin.com/deepin/pool/main/m/mysql-defaults/mysql-common_5.8+1.0.2_all.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/m/mysql-5.7/mysql-client-core-5.7_5.7.17-1_amd64.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/m/mysql-5.7/mysql-client-5.7_5.7.17-1_amd64.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/m/mysql-5.7/mysql-server-core-5.7_5.7.17-1_amd64.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/m/mecab/libmecab2_0.996-3_amd64.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/m/mysql-5.7/mysql-server-5.7_5.7.17-1_amd64.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/libh/libhtml-parser-perl/libhtml-parser-perl_3.72-3_amd64.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/libc/libcgi-pm-perl/libcgi-pm-perl_4.35-1_all.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/libf/libfcgi-perl/libfcgi-perl_0.78-2_amd64.deb  404  Not Found [IP: 202.141.160.114 80]
E: 无法下载 http://packages.deepin.com/deepin/pool/main/m/mysql-5.7/mysql-server_5.7.17-1_all.deb  404  Not Found [IP: 202.141.160.114 80]
E: 有几个软件包无法下载，要不运行 apt-get update 或者加上 --fix-missing 的选项再试试？

使用 apt-get update
E: 无法下载 http://packages.deepin.com/deepin/dists/panda/non-free/binary-i386/by-hash/SHA256/d86481a0b851c5d72caea4e0956d55382a677cf18acd4fc793421cb9b48e05ad  Hash 校验和不符
   Hashes of expected file:
    - Filesize:282679 [weak]
    - SHA256:d86481a0b851c5d72caea4e0956d55382a677cf18acd4fc793421cb9b48e05ad
    - SHA1:dfdcc4cc0e0d7b8a205b55d68154dc83df7bbd8a [weak]
    - MD5Sum:ec73b635ae2fe6f783c2e093061a521f [weak]
   Hashes of received file:
    - SHA256:fdbe612a3cbcb38dcccbcd89aaf96cb7c6f55ce40625a8d77ad0572e69fdbe3d
    - SHA1:4b431be73c4b7d06d7d23d0ed8bf28f056f71456 [weak]
    - MD5Sum:c9d96ff71877bcef033c703bdc6a4172 [weak]
    - Filesize:282679 [weak]
   Last modification reported: Tue, 20 Mar 2018 09:20:12 +0000
   Release file created at: Tue, 20 Mar 2018 08:53:41 +0000
E: 部分索引文件下载失败。如果忽略它们，那将转而使用旧的索引文件。



这是怎么回事啊