上周四开始ubuntu镜像不可用
前阵子还是好好的，上周四突然发现不能用了。
Err:1 http://mirrors.aliyun.com/ubuntu bionic InRelease Temporary failure resolving 'mirrors.aliyun.com' Err:2 http://mirrors.aliyun.com/ubuntu bionic-security InRelease Temporary failure resolving 'mirrors.aliyun.com' Err:3 http://mirrors.aliyun.com/ubuntu bionic-updates InRelease Temporary failure resolving 'mirrors.aliyun.com' Err:4 http://mirrors.aliyun.com/ubuntu bionic-backports InRelease Temporary failure resolving 'mirrors.aliyun.com' Err:5 http://mirrors.aliyun.com/ubuntu bionic-proposed InRelease Temporary failure resolving 'mirrors.aliyun.com' Reading package lists... ^[[91mW: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic/InRelease Temporary failure resolving 'mirrors.aliyun.com' W: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-security/InRelease Temporary failure resolving 'mirrors.aliyun.com' W: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-updates/InRelease Temporary failure resolving 'mirrors.aliyun.com' W: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-backports/InRelease Temporary failure resolving 'mirrors.aliyun.com' W: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-proposed/InRelease Temporary failure resolving 'mirrors.aliyun.com' W: Some index files failed to download. They have been ignored, or old ones used instead.
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