Linux Ubuntu16.04下载慢或者不成功

更换下载源

sudo gedit /etc/apt/sources.list

删除里面所有内容
粘贴以下内容
(阿里云镜像点)

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe
multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic main
restricted universe multiverse

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

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

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

更新下载源:

sudo apt-get update
Sudo apt-get upgrade

其他镜像点自行搜索。
其余18.04 20.04版本

https://developer.aliyun.com/mirror/ubuntu?spm=a2c6h.13651102.0.0.3e221b11bPinKf

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