Ubuntu安装阿里云镜像地址

• cd /etc/apt
  这个目录下的sources.list文件
  vim /etc/apt/sources.list

• 使用dd全部删除，然后添加阿里云的镜像地址

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb 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

腾讯云地址

deb http://mirrors.cloud.tencent.com/ubuntu/ bionic main universe restricted multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-security main universe restricted multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-updates main universe restricted multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-backports main universe restricted multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic main universe restricted multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-security main universe restricted multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-updates main universe restricted multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-backports main universe restricted multiverse

如果出现
错误:http://mirrors.aliyun.com/ubuntu bionic InRelease
由于没有公钥，无法验证下列签名： NO_PUBKEY 3B4FE6ACC0B21F32
因为没有导入公钥

解决办法

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32 3B4FE6ACC0B21F32 3B4FE6ACC0B21F32  3B4FE6ACC0B21F32