问题描述

在下载安装包的时候一直卡在0% [Waiting for headers]，报错信息如下：

Get:1 file:/var/cudnn-local-repo-ubuntu1804-8.5.0.96 InRelease [1,575 B]
Get:1 file:/var/cudnn-local-repo-ubuntu1804-8.5.0.96 InRelease [1,575 B]
Get:2 file:/var/cudnn-local-repo-ubuntu1804-8.5.0.96 Packages [950 B]
Get:3 https://dl.google.com/linux/chrome/deb stable InRelease [1,825 B]
Get:4 https://dl.google.com/linux/chrome/deb stable/main amd64 Packages [1,088 B]
Get:5 https://packages.microsoft.com/repos/edge stable InRelease [3,569 B]
Ign:6 https://ppa.launchpadcontent.net/jonathonf/ffmpeg-4/ubuntu jammy InRelease
Get:7 https://packages.microsoft.com/repos/edge stable/main amd64 Packages [8,803 B]
Err:8 https://ppa.launchpadcontent.net/jonathonf/ffmpeg-4/ubuntu jammy Release
404 Not Found [IP: 2620:2d:4000:1::3e 443]
0% [Waiting for headers]

解决方案

sudo rm -rf /var/lib/apt/lists/* 
sudo rm -rf /var/lib/apt/lists/partial/*
cd /var/cache/apt/archives  
sudo rm -rf partial

以上命令都是清理缓存文件。

如果清除缓存文件之后还是遇到waiting for headers，那就更换国内源

#备份现有源
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak #查看当前版本
cat /etc/issue  #修改文件，替换下面软件源，删除文件所有内容，替换对应版本的源，见Ubuntu国内源
sudo vim /etc/apt/sources.list #更新列表
sudo apt-get update 

即在sudo vim /etc/apt/sources.list的这一步，将其中的内容全部注释掉。如下：

在前面没打#的地方加上#。

然后在最前面加上：（注意我的版本是ubuntu-22.04，其余版本参加下面链接。或者试一下也可以。）

deb http://mirrors.163.com/ubuntu/ jammy main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ jammy-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ jammy-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ jammy-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ jammy-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jammy main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jammy-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jammy-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jammy-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jammy-backports main restricted universe multiverse

Ubuntu镜像使用帮助：https://mirrors.163.com/.help/ubuntu.html

大功告成！