ubuntu18.04 更换源后update失败 404

报错日志

E: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic/main/binary-arm64/Packages  404  Not Found [IP: 111.164.16.227 80]
E: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-security/main/binary-arm64/Packages  404  Not Found [IP: 111.164.16.227 80]
E: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-updates/main/binary-arm64/Packages  404  Not Found [IP: 111.164.16.227 80]
E: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-proposed/main/binary-arm64/Packages  404  Not Found [IP: 111.164.16.227 80]
E: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-backports/main/binary-arm64/Packages  404  Not Found [IP: 111.164.16.227 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

解决方法

• 查看系统cpu架构

  root@shuan-FortFirm-H3652:/etc/apt# dpkg --print-architecture
  amd64
  

• 源中指定上一步输出的系统CPU架构

  cd /etc/apt
  mv sources.list sources.list.bak
  cat > sources.list << EOF
  deb [arch=amd64] http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
  deb [arch=amd64] http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
  deb [arch=amd64] http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
  deb [arch=amd64] http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
  deb [arch=amd64] http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
  EOF
  

• 更新源

  apt-get update