docker容器中 bash: vi: command not found，docker apt-get 异常 Temporary failure resolving

bash: vi: command not found，

场景：

因为 docker里面没有这个命令，我们安装一下

apt-get update
apt-get install vim

如果 这个时候 安装也还是会出现 异常

root@446d7cf1606c:/etc/mysql# apt-get update
Err:1 http://security.debian.org/debian-security buster/updates InRelease                           
  Temporary failure resolving 'security.debian.org'
Err:2 http://repo.mysql.com/apt/debian buster InRelease                                             
  Temporary failure resolving 'repo.mysql.com'
Err:3 http://deb.debian.org/debian buster InRelease                                                 
  Temporary failure resolving 'deb.debian.org'
0% [Connecting to deb.debian.org]
Err:4 http://deb.debian.org/debian buster-updates InRelease
  Temporary failure resolving 'deb.debian.org'
Reading package lists... Done    
W: Failed to fetch http://deb.debian.org/debian/dists/buster/InRelease  Temporary failure resolving 'deb.debian.org'
W: Failed to fetch http://security.debian.org/debian-security/dists/buster/updates/InRelease  Temporary failure resolving 'security.debian.org'
W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/InRelease  Temporary failure resolving 'deb.debian.org'
W: Failed to fetch http://repo.mysql.com/apt/debian/dists/buster/InRelease  Temporary failure resolving 'repo.mysql.com'
W: Some index files failed to download. They have been ignored, or old ones used instead.
root@446d7cf1606c:/etc/mysql# 

从 异常我们可以看出来，安装找不到源。

解决方法：

sudo systemctl restart docker

对没错，重启docker即可。目的是为了，让源…等等配置文件重新启动，然后再重新对接接口下载。

没问题了。