Docker容器内更新apt-get国内加速实现过程

#1.进入容器
docker exec -it <容器名称/id> bash
#2.执行命令apt-get update 发现缓慢
#3.进入apt-get 配置目录
cd /


/apt
#4.执行备份命令 --避免修改失败无法使用
cp sources.list sources.list.bak

#5.同时执行echo下的4行命令，修改成国内镜像源
echo "">sources.list
echo "deb http://ftp2.cn.debian.org/debian/ buster main">>sources.list
echo "deb http://ftp2.cn.debian.org/debian/debian-security buster/updates main">>sources.list
echo "deb http://ftp2.cn.debian.org/debian/debian buster-updates main">>sources.list

#6.查看文件 是否修改成功
cat sources.list
###############################
root@62be94cc90e7:/etc/apt# cat sources.list

deb http://ftp2.cn.debian.org/debian/ buster main
deb http://ftp2.cn.debian.org/debian/debian-security buster/updates main
deb http://ftp2.cn.debian.org/debian/debian buster-updates main
root@62be94cc90e7:/etc/apt#
###############################
#7.更新apt-get
apt-get update
#修改完成
#如果发现安装vim 缓慢或者失败，说明本教程不适合你
apt-get install vim
#将备份完成的文件改回来，即可。
rm sources.list
mv sources.list.bak sources.list

root@62be94cc90e7:/etc/apt# apt-get update
Get:1 http://mirrors.tuna.tsinghua.edu.cn/debian buster InRelease [122 kB]
Ign:2 http://mirrors.tuna.tsinghua.edu.cn/debian/debian-security buster/updates InRelease
Ign:3 http://mirrors.tuna.tsinghua.edu.cn/debian/debian buster-updates InRelease
Err:4 http://mirrors.tuna.tsinghua.edu.cn/debian/debian-security buster/updates Release
  404  Not Found [IP: 101.6.8.193 80]
Get:6 http://mirrors.tuna.tsinghua.edu.cn/debian buster/main amd64 Packages [7906 kB]
Err:5 http://mirrors.tuna.tsinghua.edu.cn/debian/debian buster-updates Release
  404  Not Found [IP: 101.6.8.193 80]
Reading package lists... Done
E: The repository 'http://ftp2.cn.debian.org/debian/debian-security buster/updates Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ftp2.cn.debian.org/debian/debian buster-updates Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

#进入容器
docker exec -it <容器名称/id> bash
#执行命令apt-get 发现缓慢
apt-get update 
#执行命令 Ctrl + C 停止 返回命令行
cd /ect/apt
#查看目录
ls
root@62be94cc90e7:/etc/apt# ls
apt.conf.d  auth.conf.d  preferences.d  sources.list  sources.list.d  trusted.gpg.d
#执行备份命令 --避免修改失败无法使用，备份可恢复
cp sources.list sources.list.bak

#执行命令 更改apt-get 不用安装vim (vim真的太慢了)
echo "">sources.list
echo "deb http://ftp2.cn.debian.org/debian/ buster main">>sources.list
echo "deb http://ftp2.cn.debian.org/debian/debian-security buster/updates main">>sources.list
echo "deb http://ftp2.cn.debian.org/debian/debian buster-updates main">>sources.list
#更改完成后执行命令
apt-get update 
#将备份完成的文件改回来，即可。
#rm --删除文件后使用 mv --更改文件名字
rm sources.list
mv sources.list.bak sources.list